Alumina core having a high degree of porosity and crushability c

Details Alumina core having a high degree of porosity and crushability c Alumina core having a high degree of porosity and crushability c

1977-10-06

1979-08-14

McCarthy, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 40R, 106 41, 106 62, 106 65, 106 734, 164 41, 164132, 264 43, 264 65, B22D 2900, B28B 734

Patent

active

041644247

ABSTRACT:
A core for investment casting directionally solidified eutectic and superalloy material consists of alumina which has a porous microstructure in which the grain morphology is characteristic of grains which have undergone vapor phase transport action.

REFERENCES:
patent: 2593507 (1952-04-01), Wainer
patent: 3643728 (1972-02-01), Hulse
patent: 3859427 (1975-01-01), Francis et al.
patent: 3903225 (1975-09-01), Jones et al.
patent: 3969124 (1976-07-01), Stewart
patent: 4013477 (1977-03-01), Jatkar et al.
patent: 4073662 (1978-02-01), Borom
Gitzen, W. H., "Alumina as a Ceramic Material", pub. by Am. Cer. Soc., (1970), pp. 27-28, 30, 36-38, 104-105.

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