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tantalum powders

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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
...  Lead 10 10  Silicon 20 40  Tin 25 100  Titanium 10 n/a  Tungsten 250 150 Mo, Molybdenum; LOR, loss on reduction Typical compositions of sodium-reduced and electron beam melted hydrided-dehydrided tantalum powders Table 3 Typical compositions of sodium-reduced...
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.a0006123
EISBN: 978-1-62708-175-7
...-molybdenum alloys. (b) Rhenium-tungsten alloys Fig. 4 Capacitance of sodium-reduced and electron beam melted, degassed-hydride tantalum powder. Thirty min anode sintering temperature at anode green densities commonly used for each powder Fig. 5 Electrical resistivity vs. temperature...
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
... for tantalum is as powder and anodes for electronic capacitors, representing about 50% of total consumption. Mill products—sheet and plate, rod and bar, and tubing—constitute nearly 25% of tantalum consumption. The major end use for tungsten is in cemented carbides, which are used for cutting tools and wear...
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
... joining machining mechanical fastening molybdenum niobium quality control refractory metal powders rhenium secondary operations tantalum tungsten tungsten heavy alloys welding ...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005735
EISBN: 978-1-62708-171-9
... to the tantalum. Under low-pH conditions, tantalum will become sacrificial to those elements; however, a very small addition of platinum, mechanically blended with the tantalum powder during spraying operations, maintains the noble aspect of the patch under these conditions. ...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003825
EISBN: 978-1-62708-183-2
...Applications for tantalum equipment Table 1 Applications for tantalum equipment Product Operation Industry Equipment Remarks Acetic acid, crude Recovery from wood distillate Chemical Bayonet heaters, condensers … Aluminum chloride Concentration Chemical Bayonet heaters...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003777
EISBN: 978-1-62708-177-1
... micrograph of powder metallurgy tantalum (hot isostatically pressed) showing equiaxed grains with substructure and fine porosity. Chemically polished (solution A, Table 2 ), swabbed for ∼90 s, and swab etched (solution B, Table 2 ) for ∼20 s. Source: Ref 3 . Courtesy of Sherri R. Bingert, Los Alamos...
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
... Fig. 2 Weld and HAZ in electron-beam welded TZM; arrows indicate fusion line. Source: Ref 8 Fig. 4 Coarse grains in HAZ. 65×. (a) Powder metallurgy tungsten; porosity shown along fusion line. (b) CVD tungsten Fig. 5 Effect of grain size on DBTT of tungsten. Source: Ref...
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: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003994
EISBN: 978-1-62708-185-6
... °C °F °C °F °C °F Niobium and niobium alloys 99.8% Nb 2470 4475 1000 1850 N/A N/A 20–425 70–800 Excellent Nb-1Zr (b) 2400 4350 1200 2190 N/A N/A 20–425 70–800 Excellent Nb-10Hf-1Ti 2400 4350 1350 2460 800 1470 925–1370 1700–2500 Excellent Tantalum...
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
... of the recommendations made for niobium, can be considered for use with tantalum. The diffusion-sink titanium powder and a Ti-30V brazing filler alloy (braze temperature of 1760 °C, or 3200 °F) produced a remelt temperature of 2100 °C (3810 °F). A similar approach with a 33Zr-34Ti-33V (brazing temperature of 1427 °C...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005656
EISBN: 978-1-62708-198-6
... porosity was induced via powder metallurgy techniques. They believed this porous material to possess favorable mechanical properties and corrosion resistance; however, this observation was challenged by various authors at the time. Among these opponents were Lueck, Galante, and Rostoker, who, in 1969...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006255
EISBN: 978-1-62708-169-6
... powders into ingots, which are further thermomechanically worked into mill products, such as rod, wire, plate, and sheet. Niobium and tantalum products can also be produced from pressed and sintered ingots but are more commonly produced from arc-cast ingots. Intermediate and final anneals are critical...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003824
EISBN: 978-1-62708-183-2
... 2-4-2 0.193/0.170/0.170 7.6/6.7/6.7 pH=1 Nb NW Boiling … 2-4-2 >5.076 >200 pH=0.5 60 Nb NW 25 77 … 2-4-2 GW/0.025/0.003 GW/1/0.1 … Nb NW Boiling 1% copper powder 2-4-2 0.736/0.609/0.787 29/24/31 Scaled finish Nb NW Boiling 1% copper powder, iron 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
...(II) Hydroxide, Process for Their Production and Their Use , U.S. Patent 6,699,453 , March 2 , 2004 30. Crayton P.H. and Gridley M.K.C. , Vapour-Phase Synthesis of Submicron Tantalum Carbide , Powder Metall. , Vol 14 , 1971 , p 78 – 85 31. Yih S.W.H. and Wang...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001112
EISBN: 978-1-62708-162-7
..., an antidiffusion barrier is compulsory, otherwise the powder eventually reacts with the copper in the final heat treatment, yielding Cu x Mo 6 S 8 , whose superconducting properties are not desired here. This compulsory antidiffusion barrier is either niobium or tantalum. These options categorize two types...
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
...: Members are manufacturers of PM processing equipment and supplies, including compacting presses, sintering furnaces, belts, tools and dies, and atmospheres. Refractory Metals Association: Members are manufacturers of powders or products from tungsten, molybdenum, tantalum, niobium, and cobalt...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001313
EISBN: 978-1-62708-170-2
... Slip pack Molybdenum silicide and tin-aluminum Cementation and impregnation Solutions for plating niobium or tantalum Table 8 Solutions for plating niobium or tantalum Solution Constituent Amount of constituent Current density Temperature g/L oz/gal A/dm 2 A/ft 2 °C °F...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002124
EISBN: 978-1-62708-188-7
... Containing Tungsten Carbide, Titanium Carbide, and Cobalt Steel-Cutting Grades of Carbide Alloys Preparation of Tungsten Carbide Powder Tungsten-Titanium-Tantalum (Niobium) Carbides Production of Grade Powders Powder Consolidation Sintering and Postsintering Operations Postsinter Forming...