Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1996-04-12
1998-06-30
Jenkins, Daniel J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75244, 75246, 419 13, 419 19, 419 45, 419 57, B22F 310, C22C 105, C22C 110, C22C 1903
Patent
active
057737339
ABSTRACT:
The present invention provides an alumina-aluminum nitride-nickel (Al.sub.2 O.sub.3 -AlN-Ni) composite which can be prepared by pressureless sintering Al.sub.2 O.sub.3 and NiAl alloy powders or by pressureless sintering Al.sub.2 O.sub.3, Ni and Al powders in a nitrogen-containing atmosphere. The mechanical properties and the thermal conductivity of the obtained composite are better than those of alumina alone, while the electrical resistivity of the composite remains high. The composite thus is suitable for use as an electronic substrate or package.
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Alman et al., "Fabrication of Intermetallic Matrix Composites by Powder Injection Molding (PIM) Techniques", The Minerals, Metals & Materials Society pp. 109-125, 1991.
Liu et al., "Thermal Diffusivity, Heat Capacity and Thermal Conductivity in Al.sub.2 O.sub.3 -Ni Composite", Materials Science & Engineering B31:287-291, 1995.
Tuan et al., "The Preparation of Al.sub.2 Oo.sub.3 /Ni Composites by a Powder Coating Technique", Journal of Materials Science 30:855-859, 1995.
Chang Shun-Tai
Chou Wen-Bing
Tuan Wei-Hsing
Jenkins Daniel J.
National Science Council
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