Brooks & Kushman P.C.
Partially composite lightweight metal product and preform for producing the same
 A porous preform for manufacturing partially composite lightweight metal products including at least a sliding surface as composite part is made of a hard material which comprises a sintered mixture comprising TiO.sub.2 particles, short ceramic fibers and whiskers, and SiC particles having an average particle size of approximately 20 to 100 .mu.m. The partially composite lightweight metal product produced from the porous preform is provided with superior wear resistance and high strength and achieves increasing the coefficient of friction even though it is large in size, so as to keep a composite part of the composite lightweight metal product such as a sliding surface of a brake rotor remain even and smooth for a long period of time. 
Mazda Motor Corporation
B C Y C Y C C Y C
B22D C04B Y10T C04B Y10T C22C C22C Y10T C22C
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Makoto
Fujita