DOCSLIB.ORG

High Temperature Resistant Cermet and Ceramic Compositions

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
High Temperature Resistant Cermet and Ceramic Compositions United States Patent [191 [I11 4,13 1,459 Phillips [45] Dw. 26, 1978 HIGH TEMPERATURE RESISTANT Primary Examiner-Brooks H. Hunt CERMET AND CERAMIC COMPOSITIONS Attorney, Agent, or Finn-Monte F. Mott; John R. Manning; Wilfred Griflra Inventors: Jama C. Fletcher, Administrator of the National Aeronautics and Space [571 ABSTRACT Administration, with respect to an invention of Wayne M. Phillips, La Cermet compositions having high temperature oxida- Crescenta, Calif. tion resistance, high hardness and high abrasion and wear resistance, and particularly adapted for produc- Appl. NO.: 858,766 tion of high temperature resistant cermet insulator bod- Filed: Dec. 8,1977 ies, comprising a sintered body of particles of a high temperature resistant metal or metal alloy, preferably Related U.S. Application Data molybdenum or tungsten particles, dispersed in and bonded to a solid solution formed of aluminum oxide Division of Ser. No. 633,876, Nov. 20, 1975, Pat. No. 4,072,532. and silicon nitride, and particularly a ternary solid solu- tion formed of a mixture of aluminum oxide, silicon ht. Cl.2 .............................................. C22C 29/00 nitride and aluminum nitride. Also disclosed are novel U.S. Cl. ........................................ 75/20% 75/205; ceramic compositions comprising a sintered solid solu- 75/206; 75/212; 75/226; 264/60 tion of aluminum oxide, silicon nitride and aluminum Field of Search ................. 75/203, 205, 206, 212, nitride. 75/226; 264/60 The cermet compositions are designed particularly to References Cited provide high temperature resistant refractory coatings U.S. PATENT DOCUMENTS on metal substrates, preferably molybdenum or tung- sten substrates. 3,526,485 9/1970 Dawihl et al. ......................... 75/235 3,900,626 8/1975 Brennan ................................. 264/60 3,914,500 10/1975 Prennan et al. ........................ 264/60 15 Claims, 4 Drawing Figures ALUMINUM NITRIDE. AI N SILICON CERAMIC NlTRlDE OXIDES 80 60 40 Si3N4 ‘3 MOL K Si3N4- y2 03 “2’3 US. Patent Dec. 26, 1978 4,13 1,459 ALUMINUM NITRIDE. AI N FIG. I SILICON NITRIDE 20 Si3N4 80 60 40 “2 ‘3 MOL % Si3N4- y2 03 “2’3 12 ll 14 IO ‘ 18 16 FIG. 4 26 24 4,13 1,459 1 two ceramic materials, during sintering, form a very HIGH TEMPERATURE RESISTANT CEm stable solid solution, and in this state, it has been found AND CERAMIC COMPOSITIONS that the silicon nitride cannot react with the refractory metal, i.e. molybdenum or tungsten, to form a silicide, ORIGIN INVENTION OF 5 so that the resulting cermet retains its structural integ- The invention described herein was made in the per- rity. Further, the solid solution retains the crystal struc- formance of work under a NASA contract and is sub- ture of the silicon nitride so that the cermet has very ject to the provisions of Section 305 of the National high abrasion resistance, good strength at high tempera- Aeronautics and Space Act of 1958, Public Law 85-568 tures as well as resistance to thermal shock and oxida- (72 Stat. 435; 42 USC 2457). 10 tion, while at the same time having good adhesion to This is a division of application Ser. No. 633,876, filed substrate metals such as molybdenum or tungsten, due Nov. 20, 1975 now U.S. Pat. No. 4,072,532. to the molybdenum or tungsten content of the cermet. As a particular feature of the invention, it has been BACKGROUND OF THE INVENTION found that a novel ceramic composition comprising a 1. Field of the Invention 15 solid solution of certain ceramic oxides, particularly This invention relates to production of cermet com- aluminum oxide, silicon nitride and aluminum nitride positions wherein particles of a metal or metal alloy, are (AIN),when combined with certain high temperature dispersed in a matrix of a ceramic material, and is partic- resistance metals, particularly molybdenum or tungsten, ularly concerned with the production of cermet compo- results in the production of a highly valuable cermet sitions of the above type, having high temperature oxi- 20 having in addition to those properties noted above, dation resistance, high strength and hardness, and high including excellent bonding to such metals, high oxida- abrasion and erosion resistance, and particularly de- tion resistance, and good abrasion and wear resistance, signed for use as cermet seals for thermionic converters, low coefficient of friction and high hardness equivalent and diodes, and with the production of high 'tempera- to and superior to tungsten carbide. ture oxidation resistant ceramics particularly useful in 25 As previously noted, the cermet compositions of the the production of such cermet compositions. The inven- invention are particularly designed as high temperature tion is also concerned with procedure for producing resistant electrical insulators, especially for use as seals said cermet and ceramic compositions. for thermionic converters or diodes. However, the cer- 2. Description of the Prior Art met bodies produced according to the invention can It is known to strengthen high temperature resistant 30 have wide application and can be employed wherever a metals by adding ceramic or refractory metal oxides pure ceramic can be used, while at the same time pro- thereto. It is also known to incorporate high tempera- viding the above noted properties and advantages, in- ture resistant metals into ceramic materials or refractory cluding very high strength and high thermal shock metal oxides, in order to increase adhesion of the ce- resistance. Other diverse applications include use of the ramic material or refractory metal oxide to a metal 35 cermet, for example, as turbine blades, coal gasification substrate, to provide high temperature resistance refrac- equipment including powdered coal feed nozzles, reen- tory coatings on such metal substrates. try shields fpr space vehicles, and the lie, taking advan- In my U.S. application Ser. No. 348,422, filed Apt. 5, tage of the high abrasion and erosion resistance coupled 1973, there is disclosed a high strength cermet composi- with oxidation resistance of the cermet, as medical im- tion comprising a sintered body consisting of high tem- 40 plants for rebuilding bones and joint structures of the perature resistant metal or metal alloy particles such as body, and taking aivantage of the very high hardness, niobium or niobium alloys, coated with and dispersed in which produces low wear rates, good biocompatibility, a continuous matrix of a ceramic oxide such as alumina, and capability of producing surfaces with controlled yttria or zirconia, and particularly designed for use as porosity to allow bone and tissue ingrowth. The cer- cermet seals for thermionic diodes. Although such cer- 45 mets and novel ceramics formed of the three compo- met compositions have been found to e advantageous, nent single phase solid solution of aluminum oxide, cermets having even higher temperature oxidation re- silicon nitride and aluminum nitride are particularly sistance for application as seals for thermionic convert- advantageous in fabricating body joints such as hip ers are required. Also, cermets having improved hard- joints, and as tooth and bone implants. The foregoing ness, and high abrasion and erosion resistance, coupled 50 novel three-component ceramic composition and cer- with high oxidation resistance are required especially mets produced therefrom employing molybdenum and for applications such as the production of turbine tungsten as metal components, can be employed for blades. very high hardness applications such as sand blast noz- NATURE PHYSICAL SCIENCE, VOLUME 238, zles and the production of machine tools, as a substitute NO. 80, Pages 28,29, July 10, 1972, discloses ceramics 55 for tungsten carbide in such applications. obtained by hot pressing mixtures of silicon nitride and Thus, the ceramic compositions employed in produc- alumina to form a single phase solid solution, known as ing the improved cermets according to the invention the Si-A1-0-N system. are two-component single phase solid solutions consist- ing of certain ceramic oxides, particularly aluminum DESCRIPTION OF THE INVENTION 60 oxide, and silicon nitride, and especially three-compo- In accordance with the present invention it has now nent single phase solid solutions of such ceramic oxides, been found that cermet bodies, particularly having high particularly aluminum oxide, silicon nitride and alumi- temperature oxidation resistance, high strength and num nitride. abrasion resistance, as well as resistance to thermal The ceramic oxide component can be any of the shock are provided, comprising particles of molybde- 65 oxides, also known as sesquioxides, of the group consist- num or tungsten, coated with and dispersed in a solid ing of aluminum oxide (Al2O3), yttrium oxide (Y203), solution of certain ceramic oxides, particularly alumi- and chromium oxide (CrzO3), employed separately or in num oxide (A1203)and silicon nitride (Si3N4). These combination. The preferred ceramic oxide for produc- 4,13 1,459 3 4 ing the solid phase ceramic compositions employed in The compositions of the solid solutions at the points producing the cermets of the invention, is aluminum A, B, C, D, E, F, G, H, J and K, defining the boundaries oxide. However, mixtures of such ceramic oxides, par- of the above noted broad, preferred and optimum ticularly aluminum oxide together with yttrium oxide ranges of ceramic compositions, in terms of mol percent and/or chromium oxide, can be employed. Particularly 5 of the three components are set forth in the table below. preferred combinations are those of aluminum oxide and yttrium oxide, preferably in proportions of about 1 TABLE1 ’ to about 10% yttrium oxide and about 90 to about 99% aluminum oxide, by weight. Similar combinations of POINTS (mol %) A B C D aluminum oxide and chromium oxide in amounts for 10 1 10% of AlN 0 0 50 6 example of about to about chromium oxide ~~d Al o3 40 70 40 4 and about 90 to about 99% of aluminum oxide, by Range Si&4 60 30 10 90 weight, can also be employed.
Load more

Recommended publications
  • Microwave Sintering of Alumina-Titanium Cermets Redacted for Privacy Abstract Approved: (
    AN ABSTRACT OF THE THESIS OF Wendell R. Wrzesinski for the degree of Master of Material Science in Mechanical Engineering presented on 10-19-87. Microwave Sintering of Alumina-titanium Cermets Redacted for Privacy Abstract Approved: ( The influence of microwave radiation on the fabrication of cermet materials has been investigated for alumina-titanium cermets with compositions ranging from 20 to 80 wt. % titanium. An industrial microwave oven was characterized and adapted to process cermet materials. Physical and mechanical property determinations were made as a function of microwave processing time and compared to a furnace sintered sample. Electron microscopy was conducted on the composite materials in evaluat- ing the extent of bonding between metal and oxide particles and particle sizing in the cermet. Sintering of composite materials through microwave radiation usagemay be possible as a reduced cost, time-saving, processing technique. Microwave Sintering of Alumina-titanium Cermets by Wendell R. Wrzesinski A THESIS submitted to Oregon State University in partial fulfillment of the requirements for the degree of Master of Material Science Completed: 10-19-87 Commencement June 1988 APPROVED: Redacted for Privacy Profesqr of Material Science and Engineering incharge of major Redacted for Privacy head of department of MechanicalEngineering Redacted for Privacy Dean of Grad School Date thesis presented: 10-19-87 ACKNOWLEDGEMENT The author would like to sincerely thank Dr. JimRawers and Rick Wilson for their assistance and guidance inexperimentation and preparation involved with this thesis, the Bureau ofMines for its support, and those others who offered invaluableassistance including: Dr. Jim Rawers, Kellee Roub, and Rick Wilsonfor technical review of this manuscript, Dan Davis forpreparing furnace sintered materials, Keith Collins formicroscopic eval- uation, and Earl Peterson and Steve Anderson fortheir drafting and photography.
    [Show full text]
  • Nasa Tm X-3265 17 Effect of Magnesium Oxide Content
    NASA TECHNICAL. NASA TM X-3265 17 MEMORANDUM CO 1 I b- ; X in.l rui LOAN COPY: RE t-1! AFWL TECHNICAL t-1: KIRTLAND AFB EFFECT OF MAGNESIUM OXIDE CONTENT ON OXIDATION BEHAVIOR OF SOME SUPERALLOY-BASE CERMETS Isidor Zaplatynsky Lewis Research Center Cleveland, Ohio 44135 \ NATIONAL AERONAUTICS AND SPACE ADMINISTRATION • WASHINIGTUlUILJD.G - • AUGUST 1975 ERRATA NASA Technical Memorandum X-3265 EFFECT OF MAGNESIUM OXIDE CONTENT ON OXIDATION BEHAVIOR OF SOME SUPERALLOY-BASE CERMETS by Isidor Zaplatynsky August 1975 The composition of the alloy listed as Hastelloy X in table I, page 9, does not fit the specifications for HASTELLOY ® (a registered trademark of the Cabot Corporation) alloy X. Further, an analysis of this alloy indicated deviation from the specifications shown in table I. The following corrected table shows the correct analysis of this alloy, henceforth called Alloy A. Thus, throughout the report, references to Hastelloy X should be read to mean Alloy A. Further, references to Inconel-702 should be read to meanlNCONEL ® alloy 702. ERRATA NASA Technical Memorandum X-3265 EFFECT OF MAGNESIUM OXIDE CONTENT ON OXIDATION BEHAVIOR OF SOME SUPERALLOY-BASE CERMETS by Isidor Zaplatynsky August 1975 The composition of the alloy listed as Hastelloy X in table I, page 9, does not fit the specifications for HASTELLOY © (a registered trademark of the Cabot Corporation) alloy X. Further, an analysis of this alloy indicated deviation from the specifications shown in table I. The following corrected table shows the correct analysis of this alloy, henceforth called Alloy A. Thus, throughout the report, references to Hastelloy X should be read to mean Alloy A.
    [Show full text]
  • Repository Criticality Control with Depleted-Uranium-Dioxide Cermet Waste Packages
    —Summary— REPOSITORY CRITICALITY CONTROL WITH DEPLETED-URANIUM-DIOXIDE CERMET WASTE PACKAGES Charles W. Forsberg Oak Ridge National Laboratory* P.O. Box 2008 Oak Ridge, Tennessee 37831-6180 Tel: (865) 574-6783 Fax: (865) 574-9512 Email: [email protected] File Name: Cermet.DuCermet.Criticality Session: Geological Disposal Prepared for Session: Geological Disposal Embedded Topical Meeting on Practical Implementation of Nuclear Criticality Safety American Nuclear Society Reno, Nevada November 11–15, 2001 Limit: 1000 words Actual: 823 words The submitted manuscript has been authored by a contractor of the U.S. Government under contract DE-AC05-00OR22725. Accordingly, the U.S. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for U.S. Government purposes. _________________________ *Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725. REPOSITORY CRITICALITY CONTROL WITH DEPLETED URANIUM DIOXIDE CERMET WASTE PACKAGES It is proposed that the structural components and internal basket structures of spent nuclear fuel (SNF) waste packages (WPs), which will be sequestered with the SNF at the repository, be constructed of depleted uranium dioxide (DUO2 )–steel cermets. The cermet used for the WP basket would also contain neutron absorbers with high-absorption-cross-sections such as boron or rare earth oxides. This strategy would provide both operational and long-term (repository post-closure) criticality control. As the WP degrades, the 238U in the depleted uranium (DU) would mix with the degrading SNF and isotopically dilute 233U and 235U to levels (<1 wt % 235U in 238U; <0.66 wt % 233U in 238 U) that ensure critically will not occur.
    [Show full text]
  • Additive Manufacturing of Ceramics and Cermets: Present Status and Future Perspectives
    Sådhanå Ó (2021) 46:162 Indian Academy of Sciences https://doi.org/10.1007/s12046-021-01685-2Sadhana(0123456789().,-volV)FT3](0123456789().,-volV) Additive manufacturing of ceramics and cermets: present status and future perspectives MAINAK SAHA1,2,* and MANAB MALLIK1,* 1 Department of Metallurgical and Materials Engineering, National Institute of Technology, Durgapur 713209, West Bengal, India 2 Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Madras 600036, Tamil Nadu, India e-mail: [email protected]; [email protected] MS received 6 November 2020; revised 19 May 2021; accepted 6 July 2021 Abstract. The present decade has witnessed a huge volume of research revolving around a number of Additive Manufacturing (AM) techniques, especially for the fabrication of different metallic materials. How- ever, fabrication of ceramics and cermets using AM-based techniques mainly suffers from two primary limi- tations which are: (i) low density and (ii) poor mechanical properties of the final components. Although there has been a considerable volume of work on AM based techniques for manufacturing ceramic and cermet parts with enhanced densities and improved mechanical properties, however, there is limited understanding on the cor- relation of microstructure of AM-based ceramic and cermet components with the mechanical properties. The present article is aimed to review some of the most commonly used AM techniques for the fabrication of ceramics and cermets. This has been followed by a brief discussion on the microstructural developments during different AM-based techniques. In addition, an overview of the challenges and future perspectives, mainly associated with the necessity towards developing a systematic structure-property correlation in these materials has been provided based on three factors viz.
    [Show full text]
  • Some Neutron and Gamma Radiation Characteristics of Plutonium Cermet
    Some Neutron and Gamma Radiation Characteristics of Plutonium Cermet Fuel for Isotopic Power Sources R. A. NEFF, M. E. ANDERSON, A. R. CAMPBELL, and F. X. HAAS Mound Laboratory, Miamisburg, Ohio* Gamma and neutron measurements on various types of plutonium sources are presented in order to show the effects of ZTO, ZSO, ZSF, S3SPu, age of the fuel, and size of the source on the gamma and neutron spectra. Analysis of the radiation measurements shows that fluorine is the main contributor to the neutron yields from _resent plutonium-molybdenum cermet fuel while both fluorine and s Spu daughters contribute significantly to the gamma-ray intensities. Plutonium-238 has many desirable qual- The fuel used in heat sources is nomi- ities for a radioisotopic heat source fuel nally about 80% a=SPu, 16% _SgPu, and 1.2 and has been used in numerous heat sources ppm =36Pu. The _39Pu contributes a group for terrestrial, marine and space applica- of peaks around 400 keV while the main tions. The plutonium fuel has been pre- contributions from _3SPu are the two in- pared in several different forms depending tense peaks at 2614 and 583 keV due to on the requirements of the particular mis- the =°STI daughter. Other peaks from a3ePu sion and the technology available at the daughters which can be seen in this spec- time of fabrication. Fuel forms used in trum are the 510 and 860 keV peaks also the past have been plutonium metal, alloys, from S°STl, the 240 and 301 keV peaks from and dioxide microspheres. The most recent _1sPb, and the 727 and 1620 keV peaks from fuel form to be used is plutonium,molybde- SZ2Bi.
    [Show full text]
  • Microstructure and Mechanical Properties of Multicomponent Metal Ti(C,N)-Based Cermets
    metals Article Microstructure and Mechanical Properties of Multicomponent Metal Ti(C,N)-Based Cermets Xuelei Wang 1,* , Qiufeng Wang 2, Zhaojun Dong 3, Xiaoqian Zhou 1, Xiaoliang Wang 1, Boyan Zhang 1 and Chao Meng 1,* 1 College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China; [email protected] (X.Z.); [email protected] (X.W.); [email protected] (B.Z.) 2 School of Geomatics, Liaoning Technical University, Fuxin 123000, China; [email protected] 3 College of New Energy and Environment, Jilin University, Changchun 130012, China; [email protected] * Correspondence: [email protected] (X.W.); [email protected] (C.M.); Tel.: +86-0418-511-0099 (X.W.); +86-0418-511-0102 (C.M.) Received: 7 June 2020; Accepted: 8 July 2020; Published: 10 July 2020 Abstract: Ti(C,N)-based cermets with multicomponent ingredients were prepared using vacuum sintering technology. The effect of molding agents, binder phase and sintering temperature on Ti(C,N)-based cermets were studied. The optimum molding performance was obtained by adding 2% polyvinyl alcohol (PVA-1788). The microstructure and mechanical properties of Ti(C,N)-based cermets were investigated. The Ti(C,N)-based cermet with a weight percentage of TiC:TiN:Ni:Co:Mo:WC:Cr3C2:C = 40:10:20:10:7:8:4:1 and sintered at 1450 ◦C had the optimal mechanical properties. The relative bending strength, Vickers hardness, elastic modulus and wear resistance were 2010 MPa, 15.01 GPa, 483.57 GPa and 27 mg, respectively. Additionally, X-ray diffraction (XRD), backscatter scanning electron microscopy pictures (SEM–BSE), energy dispersive spectrometry (EDS) and optical micrographs of Ti(C,N)-based cermets were characterized.
    [Show full text]
  • Cermet Fuel Element
    CERMET FUEL ELEMENT (FE) ON THE BASIS OF MICROFUEL – FE PROTOTYPE FOR FUTURE POWER ENGINEERING I.I.Fedik, V.P.Deniskin, V.I.Nalivaev S.S.Gavrilin FSUE “SRI SIA “Luch” The FE with ceramic fuel and cladding of E110 alloy under average impletion depth of 43-45MW day/kg U with providing of 3 and 4 year operation periods are used successfully in VVER. The program had been developed for improving of the fuel cycles economical indexes and for further increasing the VVER operational characteristics. In this program the reactor safety increasing has been foreseen and also the coefficient of capacity using (KIUM) has at the expense of the average implement of 55-60 MW day/kg U achieving. The program foresees also the integration of 5-6 year fuel cycle and other developments [1,2]. It is planning to solve the pointed problems with help of traditional technical solution, directed to the improving of FE with ceramic fuel. In the present paper the design-engineering and experimental development results have been presented for creation of cermet FE on the basis of micro-fuel with matrix structure (in the further -the cermet FE) for VVER. The works have been carried out over period of the last 10 years in SRI SIA “Luch” jointly with” OKB “Gidropress”, VSRINM Bochvar name, RNTs “Kurchatovsky institute,” FEI and other. The construction description. Cermet FE is differed from FE with ceramic fuel and from known dispersion type FE by following (Fig. [3,4]): cermet fuel core has matrix structure, excluding the contacts between fuel particles of 500 micron size at the nuclear fuel volume part in the composition of 79%; in the capacity of matrix material the alloy on the basis of Zr is used; between the cladding and the core the precoat of type silumin material is placed, providing the metallurgy adhesion and high heat conductivity.
    [Show full text]
  • INERT MATRIX — CERMET FUELS: TOWARD OPTIMIZED UTILISATION of Pu in a PWR NEUTRONIC STUDIES — the TANOX EXPERIMENT
    INERT MATRIX — CERMET FUELS: TOWARD OPTIMIZED UTILISATION OF Pu IN A PWR NEUTRONIC STUDIES — THE TANOX EXPERIMENT J. PORTA, J.Y. DORIATH, S. BALDL B. GUIGON Centre d etudes nucleaires de Cadarache, XA9953271 Saint-Paul-lez-Durance Ph. DEHAUDT, A. MOCELLIN Centre d'etudes nucleaires de Grenoble, Grenoble C. AILLAUD Centre d'etudes nucleaires de Cadarache, Saint-Paul-lez-Durance France Abstract In order to address the new issues linked to the checking of the nuclear programme and the abandonment of the fast reactor system in France, the Nuclear Reactor Division (DRN) of the CEA launched a study programme with the aim of increasing the plutonium load in pressurized water reactors. INTRODUCTION The nuclear industry landscape has considerably changed since the 1960s: the development of the fast breeder reactor system was first curtailed, then progressively left in abeyance, which resulted in the accumulation of large amounts of plutonium. A temporary solution for these stocks of plutonium consisted in using them in pressurized water reactors (PWRs). However, for safety reasons, essentially related to the great sensitivity of the cores of these reactors - due to a very negative moderating coefficient that makes cold hazards particularly difficult to control -, the safety authorities decided to limit core loading of Pu in its conventional, MOX (Mixed Oxide) form to only 30 %. On the other hand, for reasons linked to proliferation resistance and economics, increased burnup of these fuels is highly desirable. Although 20 reactors of the French nuclear power plants are authorized to operate with a load of 30 % MOX, only 17 currently use this fuel, while eight units are soon to receive authorization to operate using this fuel.
    [Show full text]
  • D3.5 Characterization of Sintered Ceramic and Cermet Parts
    Ref. Ares(2017)6114712 - 13/12/2017 D3.5 Version: 1.0 Date: 10.07.2017 Scheduled for: month 30 Author: LITHOZ Dissemination level: PU Document reference: D3.5 Provide characterization of sintered ceramic and cermet parts Project acronym: ToMax Project name: Toolless Manufacturing of Complex Structures Call: H2020-FoF-2014 Grant agreement no.: 633192 Project duration: 36 months (2015-01-01 – 2017-12-31) Project coordinator: TUW (Technische Universität Wien) Partners: (lead) Partner LITHOZ Project no. 633192 "Toolless Manufacturing of Complex Structures" ToMax H2020-633192 ToMax D3.5v1.0 FoF-02-2014 "Manufacturing processes for complex structures and geometries with efficient use of material" D3.5 Provide characterization of sintered ceramic and cermet parts Due date of deliverable: 2017-06-30 Actual submission date: 2017-07-10 Start date of project: 2015-01-01 Duration: 36 months Lead partner for this deliverable: Partner LITHOZ Project founded by the European Commission within the Horizon 2020 Programme Dissemination Level PU Public X CO Confidential, only for members of the consortium (including the Commission Services) D3.5 - Characterization of sintered parts Page 2 of 12 H2020-633192 ToMax D3.5v1.0 History chart Version Author Date Status Reviewer 1.0 Martin 2017-06-22 Schwentenwein 2017-07-10 final Koch Abstract The subject of this deliverable is the characterization of the 3D printed ceramic (alumina and sialon) and cermet (alumina-molybdenum) parts that have been developed in the course of Tomax. For the sintered alumina ceramics it could be demonstrated that it is possible to fabricate fully dense objects with maximum wall thickness of > 10 mm in the green and 10 mm in the sintered state without any defects.
    [Show full text]
  • Fabrication of Tic-20Mass%Ni Cermet Using MA-PCS Process
    Materials Transactions, Vol. 47, No. 10 (2006) pp. 2561 to 2565 #2006 The Japan Institute of Metals Fabrication of TiC-20 mass%Ni Cermet Using MA-PCS Process Keizo Kobayashi and Kimihiro Ozaki Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology, Nagoya 463-8560, Japan Mechanical alloying and pulsed-current sintering were used to synthesize TiC-20 mass%Ni cermet with ultra-fine TiC particles dispersed. The mixture, in which Ti and Ni elements were uniformly distributed, was prepared by mechanical alloying of Ti, Ni and graphite powders for 18 ks. TiC particles were produced in the mixture milled for longer than 18 ks through a combustion synthesis reaction during heating. Mechanically alloyed Ti-C-Ni composite powder milled for 18 ks was consolidated using pulsed-current sintering at 1223 K under 70 MPa pressure. The sintered compact consisted of TiC and Ni. The average grain size of TiC particles in the sintered body was 0.80 mm. The relative density of the sintered compact reached 92% of the theoretical one; its Vickers hardness was 2260 Hv. [doi:10.2320/matertrans.47.2561] (Received April 17, 2006; Accepted August 25, 2006; Published October 15, 2006) Keywords: mechanical alloying, pulsed-current sintering, cermet alloy, TiC-20 mass%Ni, combustion synthesis reaction, ultra-fine particle 1. Introduction 2. Experimental Procedure TiC-based cermet alloys are utilized for high-performance Using planetary ball milling for 18 and 36 ks, TiC-20 cutting tools because of their high hardness and chemical mass%Ni powders were synthesized from starting materials stability.
    [Show full text]
  • 3D Gel Printing of Graded Tic-High Manganese Steel Cermet
    J Mater Sci (2019) 54:2122–2132 CompositesCOMPOSITES 3D gel printing of graded TiC-high manganese steel cermet Xinyue Zhang1, Leichen Guo2, Fang Yang1,* , Alex A. Volinsky3, Megan Hostetter3, and Zhimeng Guo1,* 1 Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China 2 School of Engineering Technology, Purdue University, West Lafayette, IN 47907, USA 3 Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA Received: 13 July 2018 ABSTRACT Accepted: 20 September 2018 A new solid freeform process, 3D gel printing (3DGP), was proposed for Published online: designing and manufacturing graded composites. As an example, TiC-high 26 September 2018 manganese steel cermet with a gradient distribution of TiC was successfully designed and fabricated by 3DGP. The rheological behavior and polymerization Ó Springer Science+Business of slurries with different TiC content have been researched. The complex- Media, LLC, part of Springer shaped green bodies were printed accurately by depositing slurries layer by Nature 2018 layer. The scanning electron microscopy and X-ray diffraction revealed the gradient distribution and morphology of the TiC particles within a sintered sample. The density, hardness, abrasion wear resistance, transverse rupture strength and impact toughness of the 3D gel-printed TiC-high manganese steel cermet appeared graded distribution corresponding to its gradient structure. Gradient distribution of the composition, microstructure and mechanical properties of the 3D gel-printed part are consistent with the design concept. Results indicated that 3DGP is a promising approach for high-throughput design and fabrication of complex-shaped graded composites. Introduction requirements within a component.
    [Show full text]
  • Ti (C, N) Titanium Carbonitride Based Cermet Rods Ticn Based Cermet with Coolant Hole Cermets Blank of CNC Cutting Tools Materials
    Ti (C, N) Titanium carbonitride based cermet rods ticn based cermet with coolant hole cermets blank of CNC cutting tools materials Ti (C, N) Titanium carbonitride based cermet rods ticn based cermet with coolant hole cermets blank of CNC cutting tools materials was measured using a metal carbon titanium, tungsten, cobalt, nickel and other metals and metal carbide powder produced by powder metallurgy method ceramic materials, hardness up HRA91-93.5, density 6.45g / cm3, is an ideal high-speed CNC tool material, mainly used in high-speed CNC machining tool, provides a perfect solution for high-speed CNC machining, Very suitable for machining difficult to machine materials, particularly high-speed machining of titanium alloys in aircraft manufacturing, processing speeds of up to 300-350 m / min, the workpiece surface finish can be a mirror effect.this product is the company's patented product, patent number: 201210087901X. 1. Advantage Cermet CNC cutting tools toughness higher than ceramic tools,More wear-resistant than carbide cutting speed faster,metal ceramics have excellent surface polishing technology and high speed machining technology.With high-speed finishing and milling technology for low-carbon steel, carbon steel, alloy steel and stainless steel,to achieve superb turning, groove, boring, bearings and milling level.Having chipping resistance and wear resistance superior cermet.Having excellent thermal conductivity and wear resistance, is steel processing the best choice,suitable for steel turning, groove, boring, bearings and milling.Covering a wide range of steel finishing to roughing field. 2. High wear resistance Cermet hardness is higher than sintering carbide material, compared with the carbide, in high temperature conditions and ferrous metal processing work-pieces affinity is low, can obtain better surface finish, from low speed to high speed machining is possible.
    [Show full text]