Core and mold materials and directional solidification of advanc

Details Core and mold materials and directional solidification of advanc Core and mold materials and directional solidification of advanc

1977-03-09

1978-06-27

McCarthy, Helen M.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 65, 106 732, 106 734, 106 41, 164132, B22C 910, B22D 2100, B28B 734, C04B 3544

Patent

active

040972925

ABSTRACT:
A ceramic article suitable for use in the casting of advanced superalloy materials has a structure of a predetermined porosity content and consists of either 3Y.sub.2 O.sub.3 .multidot. 5Al.sub.2 O.sub.3, Y.sub.2 O.sub.3 .multidot. Al.sub.2 O.sub.3 or 2Y.sub.2 O.sub.3 .multidot. Al.sub.2 O.sub.3 or two-phase mixtures of these single-phase materials.

REFERENCES:
patent: 3038861 (1962-06-01), Van Vitert
patent: 3287143 (1966-11-01), Yavorsky
patent: 3643728 (1972-02-01), Hulse
patent: 3833389 (1974-09-01), Komeya et al.
patent: 3993844 (1976-11-01), Kiger et al.
patent: 4040845 (1977-08-01), Richerson et al.
patent: 4043377 (1977-08-01), Mazdiyasni
Chem. Abstracts 64, item 16708d, (1966), "Phase Equilibriums in the Yttrium Oxide-Alumina System."
Chem. Abstracts 64, item 16708g, (1966), "Phase Equilibriums in the Y.sub.2 O.sub.3 --Al.sub.2 O.sub.3 --SiO.sub.2 System."

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