Patent ID: 8426328

Claim:
A mini-whisker composition comprising: 0.01 to 35% by weight of Al 2 O 3 orthorhombic whiskers having a length of 10-20 μm and a surface altered by wet etching with hydrofluoric acid; 0.01 to 98% by weight of SiC orthorhombic whiskers having a length of 10-20 μm and a surface altered by dry etching in a fluorination material; and 0.01 to 15% by weight of kaolin, altered by treatment with Na 2 SiF 6 , the above constituents being blended into a SiC/Al 2 O 3 composite, wherein the etched AL 2 O 3 orthorhombic whiskers and the etched SiC orthorhombic whiskers are physically separate constituents of the composition.