Sintered ceramics for cutting tools and manufacturing process th

Details Sintered ceramics for cutting tools and manufacturing process th Sintered ceramics for cutting tools and manufacturing process th

1980-03-11

1982-04-20

McCarthy, Helen M.

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

75205, 75206, 75225, 264 65, 501 87, 501 96, 501102, 501103, 501104, 501105, 501127, 501152, 501153, B24D 316, C04B 3510, C04B 3552, C04B 3558

Patent

active

043257100

ABSTRACT:
A sintered ceramics for cutting tools having a relative apparent density of not less than 98% is obtained by sintering a mixture substantially consisting of 80-95% by volume alumina and the balance of titanium nitride and Zr-containing component(s) such as Zr, ZrC and/or ZrN wherein the volumetric ratio of TiN /Zr-containing component(s) ranges 95/5-50/50 in vacuum and/or vacuum inert atmosphere. Although the present invention does not need any application of hot pressing or HIP process, the resultant ceramics has an improved abrasion resistance comparable to those obtained by the latter processes.

REFERENCES:
patent: 3669695 (1972-06-01), Iler et al.
patent: 4022584 (1977-05-01), Rudy
patent: 4217113 (1980-08-01), Suh et al.
patent: 4218253 (1980-08-01), Dworak et al.
patent: 4227842 (1980-10-01), Samanta et al.
patent: 4249914 (1981-02-01), Ogawa et al.
Claussen, N., "Fracture Toughness of Al.sub.2 O.sub.3 with an Unstabilized ZrO.sub.2 Dispersed Phase", J. Am. Cer. Soc. 59 (1976) pp. 49-51.
Claussen, N. et al., "Toughening of Ceramic Composites by Oriented Nucleation of Microcracks", J. Am. Cer. Soc. 59 (1976) pp. 457-458.
Chem.Abstracts-vol. 91 (1979) items 197773n and 111606a.

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