Process for making ceramic molds having a metal oxide barrier fo

Metal founding – Process – Shaping liquid metal against a forming surface

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164121, 164138, B22D 2106

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active

040319458

ABSTRACT:
At least one element of a superalloy cast into a refractory oxide-silica investment mold is oxidized to form a metal oxide barrier layer at the mold-metal interface to permit directional solidification of the cast superalloy at elevated temperatures without metal-mold reaction.

REFERENCES:
patent: 3743003 (1973-07-01), Brown
patent: 3779816 (1973-12-01), Woo
patent: 3802482 (1974-04-01), Phipps, Jr.
patent: 3824113 (1974-07-01), Loxley et al.
patent: 3972367 (1976-08-01), Gigliotti, Jr. et al.

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