Method of hot isostatic pressing of a porous silicon ceramic com

Details Method of hot isostatic pressing of a porous silicon ceramic com Method of hot isostatic pressing of a porous silicon ceramic com

1980-10-21

1987-09-08

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 62, 264325, 264332, C04B 3562

Patent

active

046922881

ABSTRACT:
A method including embedding a porous silicon ceramic compact, or workpiece, in a powder which is not sinterable at the process temperature, and subjecting the powder and embedded compact to heat and pressure in a hot isostatic press. The powder transmits the pressure to the compact. The powder may be the same material as the compact, except without a sintering agent, or the powder may be graphite powder. The grain size of the powder is between 2 .mu.m and 50 .mu.m. The powder and embedded compact are placed in a container prior to hot pressing; the container may be made of thin sheet metal or of quartz glass.

REFERENCES:
patent: Re28301 (1975-01-01), Havel
patent: 3469976 (1969-09-01), Iler
patent: 3562371 (1971-02-01), Bush
patent: 3892835 (1975-07-01), Holdsworth
patent: 4023966 (1977-05-01), Loersch
patent: 4112143 (1978-09-01), Adlerborn
patent: 4164527 (1979-08-01), Bakul
patent: 4256688 (1981-03-01), Adlerborn
patent: 4264546 (1981-04-01), Becker
Lange et al., "The Powder Vehicle Hot Pressing Technique", Cir. Bull, vol. 52, No. 7, (1973), pp. 563-565.

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