Heat treatment for particle reinforced alumina ceramic composite

Details Heat treatment for particle reinforced alumina ceramic composite Heat treatment for particle reinforced alumina ceramic composite

1992-07-20

1995-06-20

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Of inorganic materials

264 65, 264 66, C04B 3806, C04B 3510

Patent

active

054259096

ABSTRACT:
A heat treatment method is disclosed for improving the strength and the toughness of particle reinforced alumina composite. A densified alumina composite is heated to a temperature of higher than 600.degree. C., maintained at that temperature for about 0.5-150 hours, and then the temperature is lowered to room temperature. As a result, the flexure strength and the fracture tougnness of the particle reinforced alumina composite are substantially increased after the heat treatment in comparison to those without heat treatment.

REFERENCES:
patent: 3791861 (1974-02-01), Sundahl
patent: 4221748 (1980-09-01), Pasco et al.
patent: 4657877 (1987-04-01), Becher
patent: 4789277 (1988-12-01), Rhodes

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