A1N coated silicon nitride based cutting tools

Details A1N coated silicon nitride based cutting tools A1N coated silicon nitride based cutting tools

1988-08-12

1990-01-09

Swisher, Nancy A. B.

Stock material or miscellaneous articles

Composite

Of inorganic material

428699, C23C 1108, B32B 1304

Patent

active

048927929

ABSTRACT:
Cutting tools, cutting tool inserts, and wear parts having improved mechanical and chemical wear resistance under demanding conditions of machining speed, temperature, or wear conditions comprising a monolithic or composite silicon nitride-based substrate having a hard adherent coating layer of a refractory aluminum nitride, and optionally an outer adherent coating layer of a refractory material. The preferred outer layer refractory materials are the carbides, nitrides, and carbonitrides of Ti, Zr, Hf, Nb, V, Ta, Cr, Mo, and W, and mixtures and solid solutions thereof, alumina and zirconia.

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