Tungsten-copper composite powder

Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Consolidation of powder prior to sintering

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419 47, B22F 180

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active

059565608

ABSTRACT:
A high performance W--Cu composite powder which is composed of individual particles having a tungsten phase and a copper phase wherein the tungsten phase substantially encapsulates the copper phase. The tungsten-coated copper composite powder may be pressed and sintered into W--Cu pseudoalloy articles having a homogeneous distribution of W and Cu phases without experiencing copper bleedout or it may be used in ceramic metallization for the electronics industry.

REFERENCES:
patent: 3382066 (1968-05-01), Kenney et al.
patent: 3418103 (1968-12-01), Lasdon
patent: 3576619 (1971-04-01), Emtey
patent: 4498395 (1985-02-01), Kock et al.
patent: 4913731 (1990-04-01), Kopatz et al.
patent: 5049184 (1991-09-01), Harner et al.
patent: 5439638 (1995-08-01), Houck et al.
patent: 5467457 (1995-11-01), Dorfman et al.
patent: 5470549 (1995-11-01), Dorfman et al.
Abstract, Lee et al., Microhomogeneity and Sintering of Tungsten-Copper Composite Powders Produced by Hydrogen Reduction, Diffus. Defect Data, Pt. B (1992).
Abstract, Johnson et al., Effect of Processing Variables on the Properites of Liquid Phase Sintered Tungsten-Copper Composites, Adv. Powder Metall. (1991), 391-405.
Abstract, Tungsten-based Powder Metallurgy Alloys with Improved Density Stability--Obtd. by Sintering Reduced Tungsten and Copper Oxide(s) at Specified Temperature, Patent No. RU2003436 (1993).
V.V. Skorokhod et al., Sintering of Tungsten-Copper Composites of Various Origins, Poroshkovaya Metallurgiya, No. 9(249), pp. 9-13 (1983).
A.K. Basu et al., Copper-Tungsten Composite Powders by the Hydrogen Reduction of Copper Tungstate, J.Mater.Sci., 13, 2703-2711 (1978).
V.V. Skorokhod et al., Reaction in the Cu-W-O System, Neorganicheskie Materialy, v. 20, n. 3, 458-460 (1984).
Q. Chongliang et al., A Study on Fine Grain W-Cu Electrode Material with High Homogeneity, Proceedings of the 13th International Plansee Seminar, Metallwerk Plansee, v. 1, 461-470 (1993).
V.I. Kornilova et al., Effect of Oxygen on the Liquid-Phase Sintering of Very Fine Tungsten-Copper Powder Mixtures, Poroshkovaya Metallurgiya, n. 3(267), 24-26 (1985).
J.L. Johnson et al., Phase Equilibria Effects on the Enhanced Liquid Phase Sintering of Tungsten-Copper, Metallurgical Transactions A, v. 24A 2369-2377 (1993).
J.S. Lee et al., Microstructural Changes in W-Cu and W-Cu-Ni Compacts During Heating Up for Liquid Phase Sintering, Modern Developments in Powder Metallurgy, 15, 489-506 (1985).
J.S. Lee et al., Enhanced Sintering of Microhomogenous W-Cu Composite Powders, Proceedings of Powder Metallurgy World Congress, Japan Society of Powder and Powder Metallurgy, 365-368 (1993).
N.C. Angastiniotis et al., Formation and Alloying of Nanostructured .beta.-W Powders, Nanostructured Materials, v. 1 293-302 (1992).
B. Yang et al., A Study on Controlling the Thermal Conductivity and Sintering Properties of W-Cu Composites, P/M.sup.2 TEC' 93 Conference (May 16-19, 1993).
L.N. Paritskaya, Diffusional Homogenization in Objects from Ultrafine Powders (Review), Poroshkovaya Metallurgiya,n. 6(258), 28-39 (1984).
V.N. Troitskii et al., Initial Sintering Temperature of Ultrafine Metal Powders, Poroshkovaya Metallurgiya,n. 1(241), 13-15 (1983).
V.V. Skorokhod et al., Solid-Phase Sintering of Ultrafine W(Mo)-Cu Composite Powders, Poroshkovaya Metallurgiya, n. 1(253) 19-25 (1984).
V.N. Eremenko et al., Study of Consolidation Processes in Sintering in the Presence of a Liquid Phase, Poroshkovaya Metallurgiya, n. 4(10), 72-83 (1962).
V.V. Skorokhod et al., Structural Inhomogeneity and Localization of Densification in the Liquid-phase Sintering of Tungsten-Copper Powder Mixtures, Poroshkovaya Metallurgiya, n. 8(284), 14-19 (1986).
V.V. Panichkina et al., Liquid-Phase Sintering of Very Fine Tungsten-Copper Powder Mixtures, Poroshkovaya Metallurgiya, n. 6(234), 27-31 (1982).
A.V. Choba et al., Calculation of the Thermophysical Properties of Tunsgten-Copper Pseudoalloys, Poroshkovaya Metallurgiya, n. 8(248), 50-55 (1983).
V.A. Dymchenko, Sintering of Copper-Tungsten Materials, Poroshkovaya Metallurgiya, n. 5(269), 27-29 (1985).
B. Yang et al., The Effects of Tungsten Particle Size and Powder Treating Techniques on the Sintered Properties of W-15Cu, Adv. Powder Metall. Part. Mater., v. 2, 203-16 (1993).
K.V. Sebastian et al., Densification in W-Cu Sintered Alloys Produced from Coreduced Powders, Planseeberichte fur Pulvermetallurgie, Bd. 25, 84-99 (1977).
A.K. Basu and F.R. Sale, The Controlled Reduction of Copper Tungstate in H.sub.2 O/H.sub.2 Mixtures, J.Mater.Sci, 14, 91-99 (1979).
(Abstract) Wu et al., Study on Formation and H2 Reduction of Copper Tungstate, Zhongnan Kuangye Xueyuan Xuebao, 24(1), 64-8 (1993).

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