Wear and thermal shock resistant SiAlON cutting tool material

Details Wear and thermal shock resistant SiAlON cutting tool material Wear and thermal shock resistant SiAlON cutting tool material

1999-03-26

2000-03-28

Group, Karl

Compositions: ceramic

Optical glass

Having refractive index less than 1.8 and abbe number less...

264676, 264683, 264673, C04B 35599

Patent

active

060431768

ABSTRACT:
A sintered ceramic material for high speed machining of heat resistant alloys is provided comprising SiAlON grains and 0.2-20 v/o intergranular phase. At least 80 v/o of said SiAlON phase is beta SiAlON having a z-value greater than 1.0, but less than 1.5. The ceramic material has a Vickers Hardness HV1 of more than 1530 and it is produced by gas pressure sintering.

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Brandt et al, "Wear Mechanisms of Ceramic Cutting Tools When Machining Ferrous and Non-Ferrous Alloys", Journal of the European Ceramic Society, pp. 273-290, 1990.

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