SiC whisker and particle reinforced ceramic cutting tool materia

Details SiC whisker and particle reinforced ceramic cutting tool materia SiC whisker and particle reinforced ceramic cutting tool materia

1994-01-12

1995-05-23

Group, Karl

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 92, 501 95, 501 97, 501127, 51307, C04B 3581

Patent

active

054181976

ABSTRACT:
There is now provided a ceramic cutting tool material comprising a ceramic, preferably aluminum oxide based, matrix with 5-50%, preferably 10-40%, by volume of homogeneously dispersed SiC-whiskers and 1-20%, preferably 3-8%, by volume of particulate additions with a size <500 nm, preferably <200 nm, based upon carbides and/or nitrides and/or borides of metals from group VB (V,Nb,Ta) in the periodic system or solid solutions thereof. The nanosize particulate additions are predominantly present inside the matrix grains and not in the grain boundaries.

REFERENCES:
patent: 4320203 (1982-03-01), Brandt
patent: 4507224 (1985-03-01), Tobiana et al.
patent: 5059564 (1991-10-01), Mehrotra et al.
patent: 5123935 (1992-06-01), Kanamaru et al.
patent: 5177037 (1993-01-01), Schuldies
patent: 5250477 (1993-10-01), Baldoni, II et al.
T. N. Tiegs and P. F. Belcher, "Thermal Shock Behavior of an Alumina-SiC Whisker Composite", J. Am. Ceram. Soc., 70 [5] C-109-C-11, May 1987.

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