Method for making porous, crushable core having a porous integra

Details Method for making porous, crushable core having a porous integra Method for making porous, crushable core having a porous integra

1979-01-25

1980-09-09

McCarthy, Helen M.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Of inorganic materials

106 389, 106 40R, 106 41, 106 65, 106 734, 164 41, 164132, 264 44, 264 455, 264 65, 264 82, B22D 2900, B29H 720

Patent

active

042217482

ABSTRACT:
A method for simultaneously forming an integral porous outer barrier layer having a density gradient therein on selected external surfaces of a fired ceramic article and for increasing the porosity content and crushability characteristics thereof embodies the firing of a ceramic compact comprising a reactant fugitive filler material and a ceramic material in a controlled atmosphere.

REFERENCES:
patent: 2593507 (1952-04-01), Wainer
patent: 3538202 (1970-11-01), Bidard
patent: 3549736 (1970-12-01), Waugh
patent: 4164424 (1979-08-01), Klug et al.
Gitzen, W. H., "Alumina as a Ceramic Material," pub. by Amer. Cer. Soc. (1970), pp. 27-28, 30, 36-38, 104-105, 130-131.

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