Etching a substrate: processes – Nongaseous phase etching of substrate – Etching inorganic substrate
Patent
1996-07-01
1997-10-21
Niebling, John
Etching a substrate: processes
Nongaseous phase etching of substrate
Etching inorganic substrate
29889721, 164 36, 164132, B22D 2900
Patent
active
056792700
ABSTRACT:
A method of removing ceramic material, such as for example a ceramic core, from a metallic cast or other component involves contacting the metallic cast component and a caustic ceramic leaching medium at elevated temperature for a time effective to substantially remove the ceramic material from the component and providing an oxygen getter in the caustic ceramic leaching medium in an amount effective to avoid deleterious surface corrosion of the component while the ceramic material is being removed therefrom.
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Lawrence H. van Vlack, Elements of Materials Science and Engineering, Sixth Edition, 1990, p. 519 (Addisson Wesley Pub. Co).
Faison Julie A.
Paton Neil E.
Thornton Thomas J.
Howmet Research Corporation
Kirkpatrick Scott
Niebling John
Timmer Edward J.
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