Silicon nitride based sintered product

Details Silicon nitride based sintered product Silicon nitride based sintered product

1996-04-18

1997-12-09

Jordan, Charles T.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75232, 419 10, 419 13, 419 19, 419 20, 501 97, 501 98, B22F 100

Patent

active

056955448

ABSTRACT:
A silicon nitride based sintered product having strength at a high temperature is obtained by sintering a mixture. The mixture comprises a silicon powder or a mixture powder of silicon and silicon nitride added a sintering assistant powder, a compound powder of iron and a compound powder containing at least one of vanadium, niobium and tantalum in 5a group elements of the periodic table. The silicon nitride based sintered product contains silicon, aluminum, yttrium, oxygen, nitrogen, iron and at least one of 5a group element in the periodic table, and when weights at which the elements are present as a compound of silicon nitride, alumina, yttria, a compound powder of iron and 5a group elements in the periodic table are represented by a, b, c, d and e, the following formulae are fulfilled:

REFERENCES:
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patent: 5032554 (1991-07-01), Mizuno et al.
patent: 5114888 (1992-05-01), Mizuno et al.
patent: 5118645 (1992-06-01), Pyzik et al.
patent: 5120328 (1992-06-01), Pyzik et al.

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