Process for making TiC-base/SiC whisker composite ceramic cuttin

Details Process for making TiC-base/SiC whisker composite ceramic cuttin Process for making TiC-base/SiC whisker composite ceramic cuttin

1995-08-08

1997-02-11

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 60, 501 91, C04B 3552

Patent

active

056017642

ABSTRACT:
A ceramic cutting tool of a TiC-based sintered body containing 40 wt % or more of TiC, and 5 to 40 wt % of SiC whisker uniformly dispersed in the sintered body, said SiC whisker having a diameter of 0.2-1.5 .mu.m and a length of 1-20 .mu.m. The sintered body may include up to 40 wt % of Al.sub.2 O.sub.3, and may further contain sintering aid.
Up to 40% by weight of TiC may be substituted with at least one of Ti, nitrides, oxides and borides of Ti, and solid-solution of said nitrides, oxides and borides of Ti to form a TiC-base composition.
The TiC-base composition may be represented by (Ti.sub.a M.sub.b) (C.sub.c N.sub.d O.sub.e B.sub.f).sub.g where: M denotes at least one of transition metal elements of Groups IVa, Va and VIa, except Ti, according to the International Periodic Table; and a+b=1, 0<b.ltoreq.0.5, c+d+e+f=1, 0.5 .ltoreq.c.ltoreq.1.0, 0.ltoreq.d.ltoreq.0.5, 0.ltoreq.e.ltoreq.0.3, 0.ltoreq.f.ltoreq.0.5, 0.6.ltoreq.g.ltoreq.1.1.

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Richarson, "Modern Ceramic Eng.," Marcel Dekker, Inc., New York, 1984, p. 263.

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