Sialon type sintered bodies and method of producing the same

Details Sialon type sintered bodies and method of producing the same Sialon type sintered bodies and method of producing the same

1991-09-24

1993-08-24

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 92, 501 95, C04B 3558

Patent

active

052388859

ABSTRACT:
Sintered bodies with the primary phase of .beta. and/or .alpha. prime sialon. In the sialon phase which is the primary phase, hafnium oxide and silicon carbide are dispersedly contained as dispersion phases. 1 to 60 parts by weight of hafnium oxide are contained in 100 parts by weight of the primary phase. 5 to 30 parts by weight of silicon carbide are contained in 100 parts by weight of the primary phase. Hafnium oxide suppresses decrease of sintering characteristic which is caused by silicon carbide. Thus, a large amount of silicon carbide can be added, thereby improving the fracture toughness value.

REFERENCES:
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patent: 4767727 (1988-08-01), Claussen et al.
patent: 4801564 (1989-01-01), Baba
patent: 4816428 (1989-03-01), Kishi et al.
patent: 4826791 (1989-05-01), Mehrotra et al.
patent: 4946807 (1990-08-01), Okuno et al.
patent: 5059565 (1991-10-01), Peuckert et al.
Chemical Abstracts, vol. 102, No. 22, Jun. 3, 1985, Abstract No. 189759, "Abrasion-resistant Sialon-based ceramics".

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