Shaped bodies containing short inorganic fibers or whiskers and

Details Shaped bodies containing short inorganic fibers or whiskers and Shaped bodies containing short inorganic fibers or whiskers and

1992-04-06

1994-08-09

Bradley, P. Austin

Metal founding

Process

Shaping liquid metal against a forming surface

264 44, 164 79, 164 94, 164103, B22D 1914

Patent

active

053357124

ABSTRACT:
A fiber-organic composition includes from about 5% to 50% by volume of uniformly dispersed, non-planar or three dimensionally random oriented inorganic fibers or whiskers, and a thermoplastic material such as paraffin wax. The composition also includes surfactants to promote wetting and dispersion of the inorganic fibers or whiskers. These materials are subjected to high shear mixing to form a uniform randomly oriented three-dimensional dispersion of the inorganic fibers or whiskers. After molding the mixture in such a manner so as not to disrupt the uniform, three-dimensional orientation of the fibers or whiskers, a majority of the thermoplastic material is removed leaving a shaped body or preform having sufficient strength for handling. The shaped body or preform can then be infiltrated with molten metal or the like to form a metal matrix composite.

REFERENCES:
patent: 3608170 (1971-09-01), Larson
patent: 4233256 (1980-11-01), Ohnsorg
patent: 4424179 (1984-01-01), Minjolle
patent: 4995444 (1991-02-01), Jolly
patent: 4998578 (1991-03-01), Dwivedi
patent: 5082607 (1992-01-01), Tange
patent: 5167271 (1992-12-01), Lange
patent: 5176857 (1993-01-01), Stacey

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