Ceramic cutting tool reinforced by whiskers

Details Ceramic cutting tool reinforced by whiskers Ceramic cutting tool reinforced by whiskers

1994-04-08

1995-11-21

Group, Karl

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

501 87, 501 89, 501 91, 501 92, 501 95, 501127, 501153, C04B 35117, C04B 3556, C04B 3558

Patent

active

RE0350907

ABSTRACT:
The present invention relates to a ceramic cutting insert containing whiskers for chip forming machining of steel and having improved mechanical, thermal and wear properties. The insert comprises besides the oxide-based matrix 5-50% by volume, preferably 10-40% by volume, of homogeneously dispersed whiskers of carbides, nitrides and/or borides of titanium and/or zirconium and, where applicable, solid solutions thereof. A part of the whiskers may be replaced by whiskers of silicon carbide. The properties of the composite material can be further modified by coating the whisker material with thin layers. The whiskers reinforced cutting material shows an improved toughness behaviour and resistance to thermal crack formation without having a negative influence on the wear resistance to any appreciable extent.

REFERENCES:
patent: 4343909 (1982-08-01), Adams et al.
patent: 4767727 (1988-08-01), Claussen
patent: 4789277 (1988-12-01), Rhodes et al.
patent: 4852999 (1989-08-01), Mehrotra et al.
patent: 4925458 (1990-05-01), Mehrotra et al.

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