Stock material or miscellaneous articles – All metal or with adjacent metals – Having magnetic properties – or preformed fiber orientation...
Patent
1985-04-16
1987-04-07
Brody, Christopher W.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having magnetic properties, or preformed fiber orientation...
428614, 428929, 420489, H01F 100
Patent
active
046561005
ABSTRACT:
This composite material is composed essentially of a matrix metal which is copper or an alloy thereof, and a reinforcing fiber material which is a collection of alumina - silica type short fibers in which the included amount of alumina is about 40% by weight or more, with the total amount of non fibrous particles included in the collection of fibers being less than or equal to about 7% by weight, with the total amount of non fibrous particles with diameter greater than or equal to about 150 microns included in the collection of fibers being less than or equal to about 1% by weight, and with the volume proportion of the short fiber material being from about 0.5% to about 30%. Optionally and preferably, this volume proportion of short fiber material is from about 1.0% to about 25%, or from about 0.5% to about 10%, or even better from about 1.0% to about 5%. And the total amount of non fibrous particles can be less than or equal to about 4% by weight; and the total amount of non fibrous particles with diameter greater than or equal to about 150 microns can be less than or equal to about 0.6% by weight. The reinforcing fiber material can be fibers containing a substantial amount of silica, or alternatively can be a fiber material substantially made only of alumina; and may contain a substantial amount of, or consist substantially only of, alpha alumina. The matrix material may be pure copper, brass, or bronze.
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patent: 4465741 (1984-08-01), Yamatsuta et al.
Graham R. L. et al. "Dispersion-Hardened Copper and Copper Alloys Made from Chemically Prepared Powders" J. of Inst. of Metals, vol. 99 1971, pp. 81-92.
Dohnomoto Tadashi
Takahashi Yoshitaka
Brody Christopher W.
Toyota Jidosha & Kabushiki Kaisha
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