Whisker and particle reinforced ceramic cutting tool material

Details Whisker and particle reinforced ceramic cutting tool material Whisker and particle reinforced ceramic cutting tool material

1994-01-12

1995-05-30

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 96, 501 97, 501127, 51307, C04B 3581

Patent

active

054200830

ABSTRACT:
There is now provided an oxide-based, preferably aluminum oxide based, matrix with 5-50, preferably 10-40% by volume of homogeneously dispersed whiskers based upon nitrides, carbides and/or borides of metals from group IVB (Ti,Zr,Hf) and/or VB (V,Nb,Ta) of the periodic system or solid solutions thereof and 1-20, preferably 3-8% by volume of particulate additions with a size <500 nm, preferably <200 nm, based upon carbides, nitrides and/or borides of metals from group IVB (Ti,Zr,Hf) and/or VB (V,Nb,Ta) of 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:
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patent: 4867761 (1989-09-01), Brandt et al.
patent: 5059564 (1991-10-01), Mehrotra et al.
patent: 5141901 (1992-08-01), Brandt
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, 1987. No month.
M. Kanamaru, T. Tatsuno and T. Kusaka, "Hot-Pressed Al.sub.2 O.sub.3 /SiC Whisker/TiC Nano-Composites", Journal of the Ceramic Society of Japan, 100[4], 408-412, 1992. No month.

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