Group 4b boride and VB.sub.2 /YB.sub.2

Details Group 4b boride and VB.sub.2 /YB.sub.2 Group 4b boride and VB.sub.2 /YB.sub.2

1982-12-30

1985-10-08

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

C04C 3558

Patent

active

045460892

ABSTRACT:
A powder sinterable (without necessarily hot pressing) to a density approaching theoretical density of its composition and to 0-5 volume % open porosity, which powder has a particle size substantially less than 5 .mu.m and consisting of about 2 to 10 mole % of diboride of vanadium or yttrium, optionally very small amounts of oxygen and carbon, and the balance essentially diboride of Group 4b metal. The diborides can be in solid solution in the powder. The minor diborides are sintering aids.

REFERENCES:
patent: 2984807 (1961-05-01), Blum
patent: 3433471 (1969-03-01), Alper
patent: 3437606 (1969-04-01), Mercuri
patent: 4259119 (1981-03-01), Watanabe et al.

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