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refractory metal powders

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Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006124
EISBN: 978-1-62708-175-7
... refractory metal powders for the production of intermediate products as well as special cases of finished products. The metal powders considered include tungsten, molybdenum, tantalum, niobium and their alloys, as well as rhenium. References References 1. German R.M. , Ma J. , Wang X...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006133
EISBN: 978-1-62708-175-7
... molybdenum-rhenium tube Fig. 4 (a) Macroscopic and (b) microscopic images of friction welded Ti-Zr-Mo (TZM) rod with a diameter of 15 mm (0.6 in.) Abstract Abstract Refractory metals are typically processed from powders into ingots that are subsequently swaged into round bars or rolled...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006125
EISBN: 978-1-62708-175-7
... Filaments , Proc. International Conference On Tungsten, Refractory, & Hardmetals VII , compiled by Bose A. , Dowding R.J. , and Shields J.A. , Metal Powder Industries Federation , Princeton, NJ , 2008 , p 1.10 – 1.22 6. Brewer L. , Lamoreaux R.H. , Ferro R...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006121
EISBN: 978-1-62708-175-7
...). (b) Solid ion exchange (SIX) Abstract Abstract Refractory metals are extracted from ore concentrates or scrap, processed into intermediate chemicals, and then reduced to metal, usually in powder form. This article discusses the raw materials needed and the processing steps for producing pure...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006123
EISBN: 978-1-62708-175-7
...; PM, powder metallurgy. (b) Estimated Fig. 1 Test temperature vs. ultimate tensile strength for pure refractory metals Fig. 2 Test temperature vs. modulus of elasticity for pure refractory metals Fig. 3 Effect of alloying additions of rhenium on ductility. (a) Rhenium...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006091
EISBN: 978-1-62708-175-7
..., namely, PM methods, internal oxidation, and hybrid consolidation. The availability of the refractory metals and compounds in various product forms are also reviewed. carbide-based composites electrical contacts hybrid consolidation internal oxidation melt-cast method molybdenum powder...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006052
EISBN: 978-1-62708-175-7
...Abstract Abstract This article discusses the methods and procedures used to extract, purify, and synthesize tungsten carbide powder, metal, and other refractory carbide/nitride powders used in hard metal production. Selection of powders, additives, equipment, and processes for making ready...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006076
EISBN: 978-1-62708-175-7
... methods are copper- and silver-infiltrated refractory metals and refractory carbides, and copper-infiltrated steels. This article focuses on copper-infiltrated steels and discusses the basic requirements for infiltration, which is a technique that is only applicable to material systems that meet certain...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001105
EISBN: 978-1-62708-162-7
.... Harris G.T. and Child H.C. , The Rupture Strength of Some Metal-Bonded Refractory Oxides , in Symposium on Powder Metallurgy 1954 , Special Report No. 58, The Iron and Steel Institute , 1956 , p 325 – 330 41. Aghajanian M.K. , Burke J.T. , White D.R. , and Nagelberg...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001104
EISBN: 978-1-62708-162-7
...Properties of refractory metal carbides Table 1 Properties of refractory metal carbides Carbide Hardness, HV (50 kg) Crystal structure Melting point Theoretical density, g/cm 3 Modulus of elasticity Coefficient of thermal expansion, μm/m · K °C °F GPa 10 6 psi TiC 3000...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006056
EISBN: 978-1-62708-175-7
... Method for Fisher Number of Metal Powders and Related Compounds Air Permeability 0.50–50 B430 – Standard Test Method for Particle Size Distribution of Refractory Metal Powders and Related Compounds by Turbidimetry Turbidimetry N/A B761 – Standard Test Method for Particle Size Distribution...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006019
EISBN: 978-1-62708-175-7
... Identification of Microstructure in Cemented Carbides … B657 4499-1 Guide for Metallographic Sample Preparation of Cemented Tungsten Carbides … B665 … Short Rod Fracture Toughness of Cemented Carbides … B771 … Practice for De-agglomeration of Refractory Metal Powders and Their Compounds Prior...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006087
EISBN: 978-1-62708-175-7
... of Refractory Metal Powders” in this Volume. On a smaller scale, oxide reduction also is used for the production of cobalt and nickel powders. Oxide-reduced powder grades of iron and copper compete with powder grades made by other processes. Oxide-reduced powders characteristically exhibit the presence...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001097
EISBN: 978-1-62708-162-7
...Properties of silver metals used for electrical contacts Table 4 Properties of silver metals used for electrical contacts Alloy Solidus temperature Electrical conductivity, % IACS Hardness, HR15T Tensile strength Density, g/cm 3 Elongation in 50 mm or 2 in., % Annealed Cold...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001079
EISBN: 978-1-62708-162-7
... constitute one of the major uses for refractory metals. The largest use for tantalum is in electrolytic capacitors. Porous sintered powder metallurgy (P/M) anodes are used in both solid and wet electrolytic capacitors, and, to a lesser extent, precision tantalum foil is used in foil capacitors...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003151
EISBN: 978-1-62708-199-3
... weldable, has a very low DBTT (about 25 K, or about −250 °C) in both the welded and unwelded conditions, and exhibits relatively high solid solubility for other refractory and reactive metals. The single largest use for tantalum is as powder and anodes for electronic capacitors, representing about 50...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001456
EISBN: 978-1-62708-173-3
.... When powdered brazing filler alloys are used, additions of titanium hydride have been made. During brazing, the hydride decomposes and plates the beryllium surfaces with titanium. Because of the reactivity of the reactive and refractory metals, prebraze cleaning is more important than it is when...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001280
EISBN: 978-1-62708-170-2
...° angle air caps for coating inside diameters. The velocities of the sprayed particles from a rod gun and those from a powder gun are compared in Fig. 7 . Silicides are the most important coating materials for protecting refractory metals against oxidation. Silicide-based coatings protect by means...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001426
EISBN: 978-1-62708-173-3
... during the fusion welding of refractory metal alloys. These considerations are: microstructure, interstitial impurities, and welding conditions that are considered during the fusion welding of refractory metal alloys, including tantalum, niobium, rhenium, molybdenum, and tungsten. Refractory metal alloys...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006017
EISBN: 978-1-62708-175-7
...., The Institute of Materials , 1993 • Yule A.J. and Dunkley J.J. , Atomization of Melts for Powder Production and Spray Deposition , Oxford Science Publications , 1994 Coolidge Process Other Refractory Metals Cemented Carbides Composite Metals Porous Metal Bearings...