Titanium diboride-eased composite articles with improved fractur

Details Titanium diboride-eased composite articles with improved fractur Titanium diboride-eased composite articles with improved fractur

1989-08-31

1992-01-07

Robinson, Ellis P.

Turning

Process of turning

408144, 408 1R, 407119, 409131, 428698, B32B 1700

Patent

active

050780310

ABSTRACT:
Composite articles, cutting tools and wear parts are prepared by densification of a mixture comprising whiskers, fibers, or particles of hard refractory transition metal carbides, nitrides or carbonitrides uniformly distributed in a titanium diboride matrix. Optionally, other dispersoids may also be incorporated. The preferred composite article or cutting tool has a fracture toughness equal to or greater than about 2.5 MN.multidot.m.sup.1/2. Methods of preparation and use are also disclosed.

REFERENCES:
patent: 3972161 (1976-08-01), Zoiss
patent: 4205964 (1980-06-01), Hill
patent: 4789277 (1988-12-01), Rhodes et al.
patent: 4863490 (1989-09-01), Buljan et al.
Murate et al., Cer. Bull, 46, 643-648 (1967).

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