Ceramic alloy

Details Ceramic alloy Ceramic alloy

1980-08-27

1982-03-16

Thomas, Earl C.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 96, 501153, 75203, 75205, 75206, 51309, C04B 3556, C04B 3558

Patent

active

043202039

ABSTRACT:
Ceramic materials intended for cutting and consisting of aluminum oxide with additives of hard carbides or nitrides, particularly titanium carbide, have up to now, because of their sintering inertia, in general been pressure sintered to obtain satisfactory properties. According to the present invention a ceramic alloy of excellent technological properties has been formed and comprises principally Al.sub.2 O.sub.3 and hard nitrides or carbonitrides, such as TiN or Ti(C,N) in which the alloy contains from 2 to 95 v/o of an Al--O--N-compound, such as nitrogen stabilized aluminum oxide with cubic or nearly cubic structure.

REFERENCES:
patent: 4022584 (1977-05-01), Rudy
patent: 4204873 (1980-05-01), Yamamoto et al.
patent: 4249914 (1981-02-01), Ogawa et al.
Egorov, F. et al., "Effect of Nitrogen on the Sintering of ZrN-Al.sub.2 O.sub.3 Mixtures" Ceramic Abstracts, vol. 57, No. 7/8, 1978, p. 178, col. 1.
McCauley, J. W., "A Simple Model for Aluminum Oxynitride Spinels" JACS vol. 61, No. 7/8, 1978, pp. 372, 373.
Bradt, R., "Microstructure in Ceramic Cutting Tools" JACS vol. 44, No. 11, (1965), pp. 895-898.
Whitney, E., "New Advances in Ceramic Tooling" SME Technical Report MRR 76-15.
Pentecost, J. et al., "Oxide Ceramics in Metal Cutting Applications" in Ceramics in Severe Environments pp. 231-244.

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