Freeform Fabrication of Ti3sic2 Structures D.J. Dcosta and W. Sun
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UNITE-D STATESJPATBNT Omen .V
.' Patented Sept. 11,1934 1,973,428 UNITE-D STATESJPATBNT omen .v ’ 1,973,428 ; CEMEN'I'ED man ommn'm'raamn Gregory J. Comstock, Edgcwoorl, Pa. assignor'to ~: ' ' ' , Firth-Sterling Steel CompanmMcKeeeport, 2a., , a corporation of Pennsylvania Y . ‘ ' ' No Drawing. Application November 8,‘ 1932, Serial No. 641,762 r .' 3 Claims. (ems-1‘) cold-press, method or the hot-ypress' method. In , . This invention relates generally to hard- ce-f the cold-press method thefmixtureis compacted " mented carbide materials made by a cementing into 'a billet under relatively ‘high'pressure, for -' ‘ or sintering process, and more ‘particularly to example 10,000#/sq.~ in.v and is then preferably such materials containing tungsten carbide, tan:- ,. given'a ‘preliminary sinter at about _1600°‘>-F. ‘of 5 talum carbide, titanium carbide and an auxiliary , It is cooled and :reshaped'and then given a ?nal, I , ‘ I metal, or alloy- such as cobalt, iron or nickel. sinter at a temperature of between ‘2600 and‘ Hard cemented carbide materials containing 32009.- E, . 7' . ~ - _ tungsten carbide and iron, cobalt. or nickel are The material may be made according to the ’ now known and have been described in hot-press method in which the heat ‘and pressure 65 10 Schroeter Patent No. 1,549,615. ‘ ' ‘ ' ' - ‘I ' are applied simultaneously. We’ preter in the ' In my application, Serial No. ‘512,917, filed hot-press, method to use. ‘a temperature‘ of about . November 4, 1931, there isdescribed a hard. 3200° F. and a pressure of about 140o#/sq. in'. cemented carbidematerial containing tungsten and.‘ to carry out the sintering‘for, about ?ve _ carbide, tantalum carbide and cobalt, nickel or minutes‘ at thisftemperature. -
Method for Producing Thick Ceramic Films by a Sol Gel
Europäisches Patentamt *EP000815285B1* (19) European Patent Office Office européen des brevets (11) EP 0 815 285 B1 (12) EUROPEAN PATENT SPECIFICATION (45) Date of publication and mention (51) Int Cl.7: C23C 18/12 of the grant of the patent: // C04B41/87, C04B41/50 22.08.2001 Bulletin 2001/34 (86) International application number: (21) Application number: 96901675.7 PCT/CA96/00088 (22) Date of filing: 13.02.1996 (87) International publication number: WO 96/29447 (26.09.1996 Gazette 1996/43) (54) METHOD FOR PRODUCING THICK CERAMIC FILMS BY A SOL GEL COATING PROCESS VERFAHREN ZUR HERSTELLUNG DICKER KERAMIKFILMS DURCH SOL-GEL-BESCHICHTUNGSPROZESS PROCEDE DE FABRICATION DE FILMS DE CERAMIQUE EPAIS METTANT EN UVRE UN PROCESSUS DE REVETEMENT SOL-GEL (84) Designated Contracting States: (74) Representative: AT BE CH DE DK ES FR GB GR IE LI NL PT SE Simpson, Alison Elizabeth Fraser et al Urquhart-Dykes & Lord, (30) Priority: 22.03.1995 US 409127 30 Welbeck Street London W1G 8ER (GB) (43) Date of publication of application: 07.01.1998 Bulletin 1998/02 (56) References cited: EP-A- 0 433 915 EP-A- 0 482 659 (73) Proprietor: QUEEN’S UNIVERSITY AT KINGSTON EP-A- 0 564 866 WO-A-96/00198 Kingston Ontario K7L 3N6 (CA) US-A- 4 921 731 (72) Inventors: • TECHNICAL DISCLOSURE BULLETIN, vol. 37, • BARROW, David No 09, September 1994, "Low Leakage, Ajax, Ontario L1S 6Z4 (CA) Temperature Invariant, High Dielectric Constant • PETROFF, Edward, T. Films, using Multilayered Sol-Gel Fabrication", Scarborough, Ontario M1T 1V8 (CA) page 27 - page 28 • SAYER, Michael • PATENT ABSTRACTS OF JAPAN, vol. -
The Titanium Industry: a Case Study in Oligopoly and Public Policy
THE TITANIUM INDUSTRY: A CASE STUDY IN OLIGOPOLY AND PUBLIC POLICY DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy In the Graduate School of the Ohio State University by FRANCIS GEORGE MASSON, B.A., M.A. The Ohio State University 1 9 5 k Content* L £MR I. INTRODUCTION............................................................................................... 1 II. THE PRODUCT AND ITS APPLICATIONS...................................... 9 Consumption and Uses ................................. 9 Properties ........................................................ ...... 16 III. INDUSTRY STRUCTURE................................................................................ 28 Definition of the I n d u s t r y ............................................ 28 Financial Structure. ..••••••.••. 32 Alloys and Carbide Branch. ........................... 3 k Pigment Branch .............................................................................. 35 Primary Metal Branch ................................. 1*0 Fabrication Branch ................................. $0 IT. INDUSTRY STRUCTURE - CONTINUED............................................. $2 Introduction ................................ $2 World Production and Resources ................................. $3 Nature of the Demand for Ram Materials . $8 Ores and Concentrates Branch. ••••••• 65 Summary.................................................................. 70 V. TAXATION. ANTITRUST AND TARIFF POLICY............................ -
Pdf 1007.44 K
IJE TRANSACTIONS B: Applications Vol. 29, No. 5, (May 2016) 677-687 International Journal of Engineering Journal Homepage: www.ije.ir A Review on Titanium Nitride and Titanium Carbide Single and Multilayer Coatings Deposited by Plasma Assisted Chemical Vapor Deposition a, A. Sabour Rouhaghdamb, S. Ahangaranic٭M. Azadi a Faculty of metallurgical Engineering and material, Semnan University, Semnan, Iran b Faculty of Engineering, Materials Engineering Department, Surface Engineering Laboratory ,Tarbiat Modares University, Tehran, Iran c Advanced Materials and Renewable Energies Department, Iranian Research Organization for Science and Technology, Tehran, Iran P A P E R I N F O ABSTRACT Paper history: In this paper, we reviewed researches about the titanium nitride (TiN) and titanium carbide (TiC) Received 21 September 2015 single and multilayer coatings. These coatings were deposited by the plasma assisted chemical vapor Received in revised form 06 February 2016 deposition (PACVD) technique. Plasma-based technologies are used for the processing of thin films Accepted 4 March 2016 and coatings for different applications such as automobile and aerospace parts, computer disc drives, food industry and surgical/medical instruments. We describe the state of the performance of different Keywords: coating systems and thin film architectures in PACVD suitable for industrial-scale or laboratory Titanium Nitride applications. Mechanical properties of coatings such as wear resistance, hardness and the scratch Titanium Carbide resistance, structural characteristics, physical and chemical properties like coatings adhesion into Multilayer Coatings different substrates, wetting behavior and corrosion resistance were studied. Thus, this paper represents Hard Coatings a source of information for those who want to familiarize with the status of knowledge in the area of Plasma Assisted Chemical Vapor Deposition materials science of functional coatings, in particular TiN/TiC coatings that was deposited by a new Plasma-based technologies. -
Synthesis of Titanium Carbide by Means of Pressureless Sintering
ceramics Article Synthesis of Titanium Carbide by Means of Pressureless Sintering Tatiana Kvashina 1,*, Nikolai Uvarov 1,2 and Arina Ukhina 2 1 Department of Chemistry and Chemical Technology, Novosibirsk State Technical University, 630073 Novosibirsk, Russia; [email protected] 2 Institute of Solid State Chemistry and Mechanochemistry SB RAS, 630090 Novosibirks, Russia; [email protected] * Correspondence: [email protected]; Tel.: +7-923-129-9892 Received: 4 June 2020; Accepted: 14 August 2020; Published: 18 August 2020 Abstract: In this study, titanium carbide was obtained by low-temperature pressureless (at pressure less than 1 MPa) sintering of a mixture of elementary titanium and graphite powders in a hot-pressing plant with a preliminary mechanical treatment of the initial mixture. The sintering was carried out at temperatures of 900 and 1000 ◦C in argon media. As a result, cubic modification (Fm3m) of titanium carbide was obtained. The content of impurities was about 12–13 wt.% Keywords: titanium carbide; mechanical activation; synthesis of elements; pressureless sintering 1. Introduction Currently, the synthesis of high-melting compounds for high technology applications is one of the topical problems of material sciences. Titanium carbide exhibits such properties as high values of hardness, crack and wear resistance, fatigue limit and modulus of elasticity, and heat resistance, and is a promising compound of this type [1]. Titanium carbide is widely used as an abrasive material, a component of hard-alloy tools, cutting tools, and carbidosteels, as well as in the manufacture of dispersed-hardened alloys, metal alloying, and ceramics. A new and prospective application of titanium carbide is the synthesis of MAX phases Ti2AlC and Ti3AlC2. -
Low-Cost Synthesis and Consolidation of Titanium Carbide
Project Fact Sheet LOW-COST SYNTHESIS AND CONSOLIDATION OF TITANIUM CARBIDE BENEFITS NEW MECHANOCHEMICAL PROCESS DELIVERS • Enhances mechanical properties and ULTRA FINE TITANIUM-CARBIDE POWDER FOR USE IN wear resistance of TiC composites THE FABRICATION OF CUTTING TOOLS by reducing particle size • Significantly reduces production Titanium carbide (TiC) is a model structural material due to its hardness, high- temperature stability, and low density. However, the widespread use of TiC in energy by shortening processing cutting tools and other applications has been limited because the production of TiC time through use of ambient- has not been cost effective and the fracture strength of the material has resulted in temperature processing poor fracture toughness. • Reduces high cost of synthesized The insufficient fracture toughness of conventionally produced TiC is characteristic TiC powder, making it cost effective of the synthesis process used, which involves reduction of titanium dioxide by for use in creating cutting tools carbon black at high temperatures. These high process temperatures, in addition to • Eliminates CO gas by-product of increasing costs, also result in the formation of the large carbide particles that can cause failure of TiC-based cemented carbides. However, the use of smaller carbide conventional TiC synthesis particles for the production of fine-grained composites is prohibitively expensive. A new technology, low-cost synthesis and consolidation of TiC, is being developed APPLICATIONS as a cost-effective mechanochemical processing method that yields an ultra fine Low-cost processing of TiC would titanium-carbide powder. In this process, mechanical milling fosters an ambient- temperature reaction to produce extremely fine TiC powder, which is then combined allow its use in the cutting-tool industry with low-cost, iron-based alloy powders. -
Opas 3D-Tulostuksen Yleisimpiin Tekniikoihin Ja Niiden Haasteiden Ratkaisemiseen
JOONAS KORTELAINEN Opas 3D-tulostuksen yleisimpiin tekniikoihin ja niiden haasteiden ratkaisemiseen AUTOMAATIOTEKNOLOGIAN KOULUTUSOHJELMA 2019 Tekijä(t) Julkaisun laji Päivämäärä Kortelainen, Joonas Opinnäytetyö, ylempi AMK Joulukuu 2019 Sivumäärä Julkaisun kieli 91 Suomi Julkaisun nimi Opas 3D-tulostuksen yleisimpiin tekniikoihin ja niiden haasteiden ratkaisemiseen Tutkinto-ohjelma Automaatioteknologian koulutusohjelma Tä ssä opinnäytetyössä tuotettiin opas 3D-tulostuksen yleisimpiin ongelmatilanteisiin ja niiden ratkaisemiseen. Käsiteltäviksi 3D-tulostusteknologioiksi valittiin FDM- ja MSLA-teknologiat niiden yleisyyden vuoksi. Tämä tutkimus toteutettiin konkreettisin menetelmin, kokeilemalla ja tuottamalla on- gelmatapauksia tarkoituksella, sekä ratkaisemalla niitä saatavilla olevin keinoin sekä kokemuksen tuoman ratkaisukeskeisen toimintatavan avulla. Tuloksena on tämä opinnäytetyön muotoon kirjoitettu opas valittujen 3D-tulostustek- niikoiden yleisimpiin ongelmiin ja niiden ratkaisuihin. Ratkaisut näihin ongelmiin on tuotu esille ytimekkäästi sekä konkreettisin askelein. Lopuksi oli hyvä huomata, kuinka paljon ongelmia 3D-tulostamisessa näillä valituilla teknologioilla oikeastaan on. Käsitellyt ongelmat ovat yleisimpiä näillä tulostusteknii- koilla esille tulevia ongelmia, mutta muitakin ongelmia saattaa esiintyä. Asiasanat 3D-tulostus, ongelmanratkaisu, 3D-tulostimet Author(s) Type of Publication Date Kortelainen, Joonas Master’s thesis December 2019 ThesisNumberAMK of pages Language of publication: 91 Finnish Title of publication -
Atmospheric Pressure Chemical Vapor Deposition of Tin from Tetrakis(Dimethylamido)Titanium and Ammonia Joshua N
Journal of MATERIALS RESEARCH Welcome Comments Help Atmospheric pressure chemical vapor deposition of TiN from tetrakis(dimethylamido)titanium and ammonia Joshua N. Musher and Roy G. Gordon Department of Chemistry, Harvard University, Cambridge, Massachusetts 02138 (Received 15 December 1994; accepted 28 October 1995) Near stoichiometric titanium nitride (TiN) was deposited from tetrakis(dimethylamido)titanium (TDMAT) and ammonia using atmospheric pressure chemical vapor deposition. Experiments were conducted in a belt furnace; static experiments provided kinetic data and continuous operation uniformly coated 150-mm substrates. Growth rate, stoichiometry, and resistivity are examined as functions of deposition temperature (190–420 ±C), ammonia flow relative to TDMAT (0–30), and total gas-flow rate (residence time 0.3–0.6 s). Films were characterized by sheet resistance measurements, Rutherford Backscattering Spectrometry, and X-Ray Photoelectron Spectrometry. Films deposited without ammonia were substoichiometric (NyTi , 0.6–0.75), contained high levels of carbon (CyTi 0.25–0.40) and oxygen (OyTi 0.6–0.9), and grew slowly. Small amounts of ammonia (NH3yTDMAT > 1) brought impurity levels down to CyTi , 0.1 and OyTi 0.3–0.5. Ammonia increased the growth rates by a factor of 4–12 at temperatures below 400 ±C. Films 500 A˚ thick had resistivities as low as 1600 mV-cm when deposited at 280 ±C and 1500 mV-cm when deposited at 370 ±C. Scanning electron micrographs indicate a smooth surface and poor step coverage for films deposited with high ammonia concentrations. I. INTRODUCTION Three problems are associated with this process: Nitrides are technologically important materials be- chlorine contamination, HCl by-products, and high sub- cause of their hardness, stability at high temperatures, strate temperatures. -
Direct and Indirect Laser Sintering of Metals
Direct and Indirect Laser Sintering of Metals By Montasser Marasy A. Dewidar A Thesis submitted in accordance with the requirements for the degree of Doctor of Philosophy The University of Leeds School of Mechanical Engineering Leeds UK May 2002 The candidate confirms that the work submitted is his own and that appropriate credit has been given where reference has been made to the work of others. Abstract 11 ABSTRACT Manufacturing functional prototypes and tools using conventional methods usually is a time consuming procedure with multiple steps. The pressure to get products to market faster has resulted in the creation of several Rapid Prototyping (RP) techniques. However, potentially one of the most important areas of Rapid Manufacturing (RM) technology lies in the field of Rapid Tooling (RT). Layer manufacture technologies are gaining increasing attention in the manufacturing sector for the production of polymer mould tooling. Layer manufacture techniques can be used in this potential manufacturing area to produce tooling either indirectly or directly, and powder metal based layer manufacture systems are considered an effective way of producing rapid tooling. Selective Laser Sintering (SLS) is one of available layer manufacture technologies. SLS is a sintering process in which shaped parts are built up layer by layer from bottom to top of powder material. A laser beam scans the powder layer, filling in the outline of each layers CAD-image, and heats the selected powder to fuse it. This work reports the results of an experimental study examining the potential of layer manufacturing processes to deliver production metal tooling for manufacture of polymer components. -
Additive Manufacturing: Analysis of the Economic Context and Evaluation of the Indoor Air Quality, with a Total Quality Management Approach
DIPARTIMENTO DI ECONOMIA, SOCIETÀ, POLITICA CORSO DI DOTTORATO DI RICERCA IN Economia, Società, Diritto CURRICULUM Economia e Management CICLO XXXI Additive Manufacturing: analysis of the economic context and evaluation of the indoor air quality, with a Total Quality Management approach SETTORE SCIENTIFICO DISCIPLINARE: SECS-P/13-SCIENZE MERCEOLOGICHE RELATORE DOTTORANDA Chiar.ma Prof.ssa Federica Murmura Dott.ssa Laura Bravi CO TUTOR Ing. Francesco Balducci Anno Accademico 2017/2018 Summary INTRODUCTION CHAPTER 1: ADDITIVE MANUFACTURING: IS IT THE FUTURE? ABSTRACT .......................................................................................................................... 10 1.1 Additive and Subtractive Manufacturing ...................................................................... 10 1.2 The road towards Additive Manufacturing ................................................................... 13 1.2.1 Prehistory of AM .................................................................................................... 14 1.2.2 First attempts to modern AM ................................................................................. 16 1.2.3 The RepRap project ................................................................................................ 19 1.2.4 The Fab@Home project ......................................................................................... 23 1.3 AM today: 3D printing in the digitalization of manufacturing ..................................... 24 1.3.1 The main Additive Manufacturing -
High-Precision and Innovative Additive Manufacturing Solutions Based on Photopolymerization Technology
materials Review A New Approach to Micromachining: High-Precision and Innovative Additive Manufacturing Solutions Based on Photopolymerization Technology Paweł Fiedor 1 and Joanna Ortyl 1,2,* 1 Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland; pawel.fi[email protected] 2 Photo HiTech Ltd., Bobrzy´nskiego14, 30-348 Cracow, Poland * Correspondence: [email protected] Received: 9 June 2020; Accepted: 29 June 2020; Published: 1 July 2020 Abstract: The following article introduces technologies that build three dimensional (3D) objects by adding layer-upon-layer of material, also called additive manufacturing technologies. Furthermore, most important features supporting the conscious choice of 3D printing methods for applications in micro and nanomanufacturing are covered. The micromanufacturing method covers photopolymerization-based methods such as stereolithography (SLA), digital light processing (DLP), the liquid crystal display–DLP coupled method, two-photon polymerization (TPP), and inkjet-based methods. Functional photocurable materials, with magnetic, conductive, or specific optical applications in the 3D printing processes are also reviewed. Keywords: 3D printing; high-resolution; additive manufacturing; photopolymerization; industry 4.0; stereolithography; two-photon polymerization 1. Introduction Three dimensional (3D) printing is currently an extremely important branch of Research and Development (R&D) departments. This is because of its rapid prototyping, swift elimination of design errors, and improvements of the product at the prototyping stage. This approach significantly accelerates the implementation of new solutions without incurring significant production costs and eliminating in-production testing of underdeveloped models. Thanks to 3D printing techniques, making a prototype with complex geometry has become possible in a short time with unprecedented precision [1]. -
History of Additive Manufacturing
Wohlers Report 2014 History of Additive Manufacturing History of additive This 34‐page document is a part of Wohlers Report 2014 and was created for its readers. The document chronicles the history of additive manufacturing manufacturing (AM) and 3D printing, beginning with the initial by Terry Wohlers and Tim Gornet commercialization of stereolithography in 1987 to May 2013. Developments from May 2013 through April 2014 are available in the complete 276‐page version of the report. An analysis of AM, from the earliest inventions in the 1960s to the 1990s, is included in the final several pages of this document. Additive manufacturing first emerged in 1987 with stereolithography (SL) from 3D Systems, a process that solidifies thin layers of ultraviolet (UV) light‐sensitive liquid polymer using a laser. The SLA‐1, the first commercially available AM system in the world, was the precursor of the once popular SLA 250 machine. (SLA stands for StereoLithography Apparatus.) The Viper SLA product from 3D Systems replaced the SLA 250 many years ago. In 1988, 3D Systems and Ciba‐Geigy partnered in SL materials development and commercialized the first‐generation acrylate resins. DuPont’s Somos stereolithography machine and materials were developed the same year. Loctite also entered the SL resin business in the late 1980s, but remained in the industry only until 1993. After 3D Systems commercialized SL in the U.S., Japan’s NTT Data CMET and Sony/D‐MEC commercialized versions of stereolithography in 1988 and 1989, respectively. NTT Data CMET (now a part of Teijin Seiki, a subsidiary of Nabtesco) called its system Solid Object Ultraviolet Plotter (SOUP), while Sony/D‐MEC (now D‐MEC) called its product Solid Creation System (SCS).