Wear and thermal shock resistant SiAION cutting tool material

Compositions: ceramic – Ceramic compositions – Refractory

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C04B 35599

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active

059654716

ABSTRACT:
A sintered ceramic material for high speed machining of heat resistant alloys is provided comprising SiAION grains and 0.2-20 v/o intergranular phase. At least 80 v/o of said SiAION phase is beta SiAION 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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Stephen J. Burden et al., "Comparison of Hot-Isostatically-Pressed and Uniaxially Hot Pressed Alumina-Titanium Carbide Cutting Tools", Ceramic Bulletin, vol. 67, No. 6, pp. 1003-1005, 1988.
Huet, J.F. and Kramer, B.M., "The Wear of Ceramic Tools", Proceedings of the 10th North American Metalworking Research Conference, ed. R.S. Hahn, ASME, Dearborn, MI, 1993, pp. 297-304.
Brandt, G., Gerendas, A. and Mikus, M., "Wear Mechanisms of Ceramic Cutting Tools When Machining Ferrous and Non-ferrous Alloys", Journal of the European Ceramic Society, 1990, pp. 273-290.

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