High density metal boride-based ceramic sintered body

Details High density metal boride-based ceramic sintered body High density metal boride-based ceramic sintered body

1990-04-18

1991-07-30

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501 87, 501 93, 75236, 75238, 75244, C04B 3558

Patent

active

050360280

ABSTRACT:
A high density metal-boride based ceramic sintered body consists essentially of component (A) at least one of TiB.sub.2, ZrB.sub.2, CrB.sub.2, HfB.sub.2, VB.sub.2, TaB.sub.2, NbB.sub.2, MnB.sub.2, MoB.sub.2, YB.sub.2, AlB.sub.2, MgB.sub.2, CrB, VB, TaB, NbB, MoB, HfB, YB, ZrB, HfB, TiB, MnB, W.sub.2 B.sub.5 and Mo.sub.2 B.sub.5, componet (B) 0.1 wt. %-10 wt. % based on the total amount of a metal binder comprising at least one of cobalt boride, nickel boride and iron boride, and component (C) 0.1 wt. %-10 wt. % based on the total amount of at least one of a double carbide comprising Ti, Zr, W and C, ZrCN, HfCN, or a double carbo-nitride comprising Ti, Zr, Hf and C, N.
The sintered body is not easily oxidized and has extremely few pores and high shock resistance even using a fine grain raw material powder because component (C) has an oxygen removing effect during sintering.

REFERENCES:
patent: 4259119 (1981-03-01), Watanabe et al.
patent: 4275026 (1981-06-01), Hazel et al.
patent: 4492764 (1985-01-01), Watanabe et al.

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