Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1985-07-26
1987-10-27
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
419 2, 419 17, 419 23, 419 27, 419 45, 419 47, 419 29, 428375, 428704, 428549, C22C 2902, B22F 326, B22F 312
Patent
active
047027703
ABSTRACT:
Low-density composites are produced consisting chiefly of boron carbide and aluminum, or aluminum alloy, and minor amounts of ceramic material. The method allows control of the rate of reaction between boron carbide and metal so that the final components of the composite, and hence the mechanical properties, are controlled. The invention includes modification of the carbon content of the boron carbide composition, dispersion of boron carbide and formation of a compact, infiltration of the compact by aluminum or aluminum alloy, and heat treatments. The invention produces low-density boron carbide-aluminum composites with a homogeneous microstructure possessing desired mechanical properties.
REFERENCES:
patent: 2746133 (1956-05-01), Lowe
patent: 3364152 (1968-01-01), Lipp
patent: 3725015 (1973-04-01), Weaver
patent: 3749571 (1973-07-01), Stibbs
patent: 4104062 (1978-08-01), Weaver
patent: 4605440 (1986-08-01), Halverson et al.
Aksay Ilhan A.
Pyzik Aleksander J.
Lechert Jr. Stephen J.
Thomas J. E.
Washington Research Foundation
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