Inventors:
Bruce E. Terkelsen - Cheshire CT
Assignee:
United Technologies Corporation - Hartford CT
International Classification:
B22D 2704
Abstract:
Disclosed are a mold, apparatus and method for obtaining articles of controlled crystallographic orientation using solidification from seeds. The starter section of a directional solidification mold is adapted to both contain a seed and receive molten metal which is flowed over and about a seed to heat and partially melt it. A selector section of the mold has reduced cross section compared to the starter section so that only epitaxially solidified metal will be formed in the article section. A barrier layer resistive to molten metal is applied to portions of the seed to facilitate its removal and reuse.