Sintered ceramic materials

Details Sintered ceramic materials Sintered ceramic materials

1988-12-07

1990-07-24

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 97, 501 98, 501127, 501128, 501133, 501153, 501154, C04B 3558, C04B 3510, C04B 3514

Patent

active

049435434

ABSTRACT:
This invention relates to sintered ceramic materials in which the densification during sintering takes place with a liquid phase preferably based on silicon nitride. During sintering such materials are often embedded in a powder of inert material such as BN, etc. The invention resides in the fact that by embedding the material to be sintered in a protective powder with a composition similar to that of the intergranular phase, a surface zone with a composition and/or structure different from that of the core can be obtained.

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patent: 4543345 (1985-09-01), Wei
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patent: 4640903 (1987-02-01), Matsuhiro et al.
".alpha.'-Sialon Ceramics", Nature, vol. 274, No. 10, pp. 251-256. Park H. K., Thompson D. P. and Jack K. H., .alpha.-Sialon Ceramics, Science of Ceramics, vol. 10.
Bhattacharyya S. K., Jawaid A., Lewis M. H. & Wallbank J., "Wear Mechanisms of Syalon Ceramic Tools When Maching Nickel-Based Materials", Metal Technology, Dec. 1983, vol. 10.

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