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09AM Preliminary Program.Indd Technical Program the initial strength of the as-consolidated specimens. Support from the DOE-FE (ARM program) through Ames Laboratory contract no. DE-AC02-07CH11358 is 2009 Functional and Structural Nanomaterials: gratefully acknowledged. Fabrication, Properties, and Applications: Nanoscale 9:15 AM Powders: Materials, Synthesis and Applications Synthesis of Nano-Scale Fibrous Ni/Co Alloy Powders from Complex Nickel- Sponsored by: The Minerals, Metals and Materials Society, TMS Electronic, Cobalt Oxalate Containing Ammonia: Zhan Jing1; Zhang Chuanfu1; Huang Magnetic, and Photonic Materials Division, TMS Materials Processing and Manufacturing Boyun1; He Yuehui1; Fan Youqi1; 1Central South Univerisity Division, TMS: Nanomaterials Committee, TMS: Nanomechanical Materials Behavior Committee A nickel –cobalt oxalate complex precursor containing ammonium for the Program Organizers: Gregory Thompson, University of Alabama; Amit Misra, Los synthesis of nano-scale fi brous nickel cobalt powder was obtained by coordination Alamos National Laboratory; David Stollberg, Georgia Tech Research Institute; Jiyoung coprecipitation techinique under suitable conditions. The experimental conditions Kim, University of Texas at Dallas; Seong Jin Koh, University of Texas at Arlington; including feeding methods, precipitation temperature, reactant concentration, Wonbong Choi, Florida International University; Alexander Howard, Air Force Research surfactant, washing method and pH value of solution that infl uence the Laboratory morphology, average particle size and the dispersion of the precursor have been studied in detail. SEM, XRD pattern, thermal analysis and IR spectroscopy were Thursday AM Room: 3020 used in the characterization and the evaluation of some aspects of the formation February 19, 2009 Location: Moscone West Convention Center mechanism of fi brous morphology of the precursor. The crystallinity, purity, and surface morphology of the as-prepared NixCo1-x fi bers were investigated by Session Chair: Gregory Thompson, University of Alabama XRD, SEM, respectively. The X-ray photoelectron spectroscopic(XPS) data have confi rmed that the nickel and cobalt in the bimetallic nano-scale fi bre are in the 8:30 AM zero-valence state. Mono-Dispersed Nano-Crystalline Aggregated Nickel Powders Obtained by 9:30 AM Using Hydrazine in the Presence of Sodium Dodecyl Sulphate: Mohammad Development and Characterization of Nanoporous Carbon Coated ZnO Hussain1; 1KACST Powders Prepared by Pyrolysis of Spray Dryed Mixtures: Burak Özkal1; A range of aggregated mono-dispersed nano-crystalline nickel powders has Seyma Duman1; Osamu Yamamoto2; 1ITU; 2Akita University been synthesized by chemical reduction process using hydrazine as a reducing It is known that some carbons remain as residue during inert atmosphere agent at 600C. The rate of reaction was further accelerated as the temperature pyrolysis of polymers and type and polymerization degree of the polymer are was increased to 800C. Under refl ux conditions at 1000C, the rate of reaction very important parameters leading different fi nal properties. Starting from was much faster and even fi ner powders were obtained. The aggregated powders homogeneous polymer and powder mixtures, it is possible to produce composite were characterized by XRD, SEM and TEM. The results showed the presence powders and structures where the outer phase is amorphous carbon. This of nickel particles which were less than 20nm in diameter. The particle size of coating layer is very attractive especially for nanopowders and nanofi bers where the synthesized metal powders was also measured at room temperature (RT) encapsulation is necessary. In this study, development and characterization of using Nano ZS Particle Sizer instrument (Malvern Instrument), which utilizes the nanoporous carbon coated ZnO powders were performed consecutive the technique of dynamic light scattering (DLS). Further thermodynamic processes of spray drying and polymer pyrolysis technics. For this purpose measurements were carried out using Differential Scanning Calorimeter (DSC) spray drying process conditions of ZnO powders having different amounts of and Thermal Gravimetric Analyser (TGA) to establish any differences in the PVA were optimized and fi nal products were characterized via advanced powder energy levels of the powders synthesized by different methods. These results are characterization technics. Spray dryed powders were subjected to polymer further discussed. pyrolysis under protective atmosphere and then integrity of ZnO granules and 8:45 AM properties of nanoporous carbon coating were characterized. Nano-Powders of Ni N and Ni Metal Prepared through Liquid Ammonia 3 9:45 AM Solution: Zhao Han1; Hailong Qiu1; Hongmin Zhu1; 1Beijing University of Optical and Magnetic Properties of Transition Metal-Doped ZnO Nanoscale Science and Technology Powders Synthesized by Chemical Method: M. Khan1; 1Center for Advanced Nickel nitride(Ni N) nano-powders were synthesized through chemical 3 Mathematics and Physics, reduction, of NiCl by sodium in liquid ammonia at -45°C. The produced Ni N 2 3 We report the results of a detailed investigation of sol–gel-synthesized nano-powders were heat-treated and subsequently converted to nickel metal PRELIMINARYnanoscale (Co,Mn) co-doped ZnO powders processed at 600°C in forming gas nano-powders at 300°C. The crystal structures and particle morphologies of (Ar95%+H5%) to understand how the structural, optical and magnetic properties the products were characterized by X-ray powder diffraction(XRD) and fi eld of ZnO are modifi ed by doping, in addition to searching for the theoretically emission scanning electron microscope(SEM). The results indicated that the predicted ferromagnetism. X-ray diffraction results indicate a purely single phase. products were hexagonal Ni N and cubic nickel metal powders, with average 3 The diffused refl ectance spectroscopy revealed many characteristic absorption particle size of 21 nm and 19 nm, respectively. The possible mechanisms of the bands correspond to the Co+2 ions and Mn+2 ions in tetrahedral symmetry, reactions were also discussed. indicating that dopants (Co, Mn) are well substituted in ZnO lattice. Magnetic 9:00 AM measurements showed a paramagnetic when the samples annealed in air. However Consolidation of Gas Atomized Precursor Alloy Powder for the Formation a weak ferromagnetic behaviour was observed for the sample containing Mn T of an Oxide Dispersion Strengthened Ferritic Stainless Steel Microstructure: (4at%) while Co varied x = 0.00-0.02. One the other hand a relatively strong H Joel Rieken1; I. Anderson2; M. Kramer2; Y. Wu2; J. Anderegg2; 1Iowa State ferromagnetic coupling observed in the samples containing Co (4at%) with Mn U University 2Ames Laboratory variation. The mechanism of ferromagnetic behavior can be interpreted in light of Gas atomization reaction synthesis (GARS) was used as an innovative route F-center exchange (FCE) model. R for the fabrication of precursor oxide dispersion strengthened ferritic stainless 10:00 AM S steel powder. During this process the as-atomized powder particles, with a Synthesis and Crystallization of Amorphous Nano-sized Si-B-N Powders: nominal chemical composition of Fe-(12.5-15.0)Cr-(0.5-1.0)Y-(0.0-0.54)Ti-(0.0- D Hailong Qiu1; Mei Yang1; Zhao Han1; Hongmin Zhu1; 1Beijing University of 3.0)W wt.%, were reacted in situ forming a thin surface oxide. The surface oxide A Science and Technology of the particles is intended to act as an internal oxygen supply reservoir for the Si-B-N ceramic powders were prepared through chemical reduction,of SiCl Y formation of nano-metric yttrium-enriched oxide dispersoids. The formation of 4 and BBr by sodium in liquid ammonia. The products obtained were characterized the nano-metric dispersoids occurs during elevated temperature consolidation of 3 by X-ray diffraction (XRD), transmission electron microscopy (TEM), and the powders and is driven by an oxygen exchange reaction between the initial A selected area electron diffraction (SAED). The results indicated that the products surface oxide (e.g., chromium oxide) and yttrium metal. Microstructure phase were amorphous phase with the particle size less than 50nm. The powders were M evaluation was performed using scanning electron microscopy and transmission heat-treated under vacuum at various temperatures. Up to 1500oC, the powder electron microscopy. Elevated temperature tensile testing was used to examine remained in amorphous phase. When the powders were heated at temperatures 334 Technical Program higher than 1500oC, crystallites of silicon nitride and boron nitride appeared form 9:50 AM Break the matrix phase. 10:10 AM Superior Arguments for Most Modern Filtration Technologies in High Capacity Alumina Refi neries: Reinhard Bott1; Thomas Langeloh1; Juergen Hahn1; 1Bokela GmbH Alumina and Bauxite: Process Improvements and In the last years capacity of alumina plants steadily increased leading to high Experiences - White Side capacity alumina refi neries with annual production rates up to 3 Mt/y and even Sponsored by: The Minerals, Metals and Materials Society, TMS Light Metals more. Before this background requirements on fi ltration technologies increased Division, TMS: Aluminum Committee Program Organizers: Everett Phillips, Nalco Co; Sringeri Chandrashekar, Dubai and great importance is placed on factors such as performance capacity, improved Aluminum Co operation control, availability of equipment, reliability of operation, ease of maintenance or impact of the
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