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niobium 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
... powder made by the hydride-dehydride process Table 4 Typical composition of niobium and C-103 niobium alloy powder made by the hydride-dehydride process Element Analysis, ppm Niobium C-103 Niobium 99.7+% 87.2+% Oxygen 1820 1980 Tantalum 800 2800 Hafnium <20 9.8...
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
... for rhenium, its alloys, and other refractory metals Abstract Abstract This article focuses on the selection, properties, and applications of powder metallurgy refractory metals and their alloys, including tungsten, molybdenum, tantalum, niobium, and rhenium. References References 1...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001111
EISBN: 978-1-62708-162-7
... diffusion) and multifilamentary wires (rod process, modified jelly roll process, niobium tube process, in-situ process, powder metallurgy process, and jelly roll method). The article focuses on reaction heat treatment, which is required at the end of wire processing to convert the ductile components...
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
... that of tantalum oxide (41.4 versus 25.3), niobium powder is not extensively used for capacitors. The problem with niobium is that the amorphous anodic oxide film, formed as the dielectric, crystallizes at a relatively low temperature, thereby causing performance decay in the capacitor. Tantalum cases (or cans...
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: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001456
EISBN: 978-1-62708-173-3
... alloy produced joints with high ductility and minimum base-metal erosion. Two diffusion-enhanced approaches have been explored to produce higher-temperature properties in niobium brazes. One method adds base-metal powder to the brazing alloy, that is, niobium powder added to a Ti-33Cr alloy brazed...
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
... abraded material (except tungsten) hindering its cutting effectiveness. In industry, tantalum, which closely resembles niobium, is produced as a powder or sponge and is further purified in the solid or the liquid state. Solid-state purification occurs during sintering; liquid-state purification occurs...
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
...Corrosion of niobium alloys in aqueous hydrochloric acid Table 1 Corrosion of niobium alloys in aqueous hydrochloric acid HCl, wt% Test duration, days Specimen condition (a) Temperature Corrosion rate Impurities Comments Nb Nb-1Zr °C °F mm/yr mils/yr mm/yr mils/yr...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003151
EISBN: 978-1-62708-199-3
...Abstract Abstract The refractory metals include niobium, tantalum, molybdenum, tungsten, and rhenium. They are readily degraded by oxidizing environments at moderately low temperatures. Protective coating systems have been developed, mostly for niobium alloys, to permit their use in high...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006067
EISBN: 978-1-62708-175-7
..., austenitic, ferritic, and martensitic, are well suited for manufacture via conventional powder metallurgy (PM) processes. This article presents the iron-chromium partial phase diagram to illustrate the changes in the temperature range when pure iron is alloyed with chromium. It describes AISI and UNS...
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.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 Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005773
EISBN: 978-1-62708-165-8
... min. (b) 900 °C, 30 min. (c) 1000 °C (1830 °F), 1 min. (d) 1000 °C, 30 min Fig. 4 Optical cross-sectional view of niobium carbide coating with remarkably large thickness formed on D3 by high-temperature borax bath. Coating temperature: 1000 °C (1830 °F); time: 24 h; 10 wt% Fe-Nb powders...
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: 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: 3
Publisher: ASM International
Published: 27 April 2016
DOI: 10.31399/asm.hb.v03.a0006243
EISBN: 978-1-62708-163-4
... Source: I.I. Kornilov and R.S. Polyakov, Phase Diagram of the Ternary System Titanium-Niobium-Molybdenum, Zh. Neorg. Khim. (Russ. J. Inorganic Chem.) , Vol 3, 1958, p 62–74 ( Ref 1 ) Source: I.I. Kornilov and R.S. Polyakov, Phase Diagram of the Ternary System Titanium-Niobium-Molybdenum...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006120
EISBN: 978-1-62708-175-7
...Metal Powder Industries Federation Standard 35 mechanical property specifications for 300-series austenitic stainless steel alloys Table 1 Metal Powder Industries Federation Standard 35 mechanical property specifications for 300-series austenitic stainless steel alloys Powder metallurgy...
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...
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
... of hydrometallurgically produced oxides and by the decomposition of the carbonyl complexes ( Ref 1 ). Titanium, tantalum, niobium, zirconium, molybdenum, vanadium, and chromium carbide powders are produced by carbothermal reduction of the respective oxide powders at temperatures in the range of 1300 to 2000 °C (2370...