Al.sub.2 O.sub.3 composites, process for producing them and throw-away tip made of Al.sub.2 O.sub.3 composites

Year	Description
1990	Invention patented by Moriyoshi Kanamaru, Tsuneo Tatsuno, and Noboru Ohyama on December 6th, 1990. Abstract: In Al.sub.2 O.sub.3 composites used for machining tools for difficult-cutting steels, etc., strength and toughness are increased by dispersing a Ti compound with an average grain size of not greater than 0.1 .mu.m into Al.sub.2 O.sub.3 particles with the average grain size of not greater than 1 .mu.m, and SiC whiskers are uniformly dispersed between each of Al.sub.2 O.sub.3 particles to form a nanocomposite structure. For the above-mentioned purpose, SiC whiskers containing 0.3 to 1.5% by weight of oxygen, dissolved uniformly in a solvent, are mixed with a starting Al.sub.2 O.sub.3 series powder containing Ti compounds to form a uniform mixture, which is then molded and sintered.
Source: selected by the editor from original sources.

Invention: Al.sub.2 O.sub.3 composites, process for producing them and throw-away tip made of Al.sub.2 O.sub.3 composites