Composite material reinforced with alumina-silica fibers...

Details Composite material reinforced with alumina-silica fibers... Composite material reinforced with alumina-silica fibers...

B - Operations, Transporting

22

F

75/1.21

B22F 3/22 (2006.01) C22C 47/06 (2006.01) C22C 47/08 (2006.01) F02B 77/02 (2006.01) F02F 7/00 (2006.01)

Patent

CA 1239297

ABSTRACT OF DISCLOSURE This composite material includes reinforcing alumina - silica fiber material in a metal matrix. The alumina - silica reinforcing fibers have principal components about 35% to about 65% by weight of SiO2, about 35% to about 65% by weight of Al2O3, and a content of other substances of less than or equal to about 10% by weight, with the weight percentage of the mullite crystalline form therein being at least about 15% and with the weight percentage of included non fibrous particles with diameter greater than or equal to 150 microns being not more than about 5%. And the matrix metal is selected from the group consisting of aluminum, magnesium, copper, zinc, lead, tin, and alloys having these as principal components. The volume proportion of the alumina - silica fibers should be at least 0.5%. Within these constraints, the qualities of the composite material with regard to wear, and wear on a mating member, and hardness, bending strength, and tensile strength, are good.

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