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Apparatus and method for producing single crystal metallic objects

United States Patent

March 14, 2006
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A mold is provided for enabling casting of single crystal metallic articles including a part-defining cavity, a sorter passage positioned vertically beneath and in fluid communication with the part-defining cavity, and a seed cavity positioned vertically beneath and in fluid communication with the sorter passage. The sorter passage includes a shape suitable for encouraging a single crystal structure in solidifying molten metal. Additionally, a portion of the mold between the sorter passage and the part-defining cavity includes a notch for facilitating breakage of a cast article proximate the notch during thermal stress build-up, so as to prevent mold breakage or the inclusion of part defects.
Huang; Shyh-Chin (Latham, NY), Gigliotti, Jr.; Michael Francis X. (Scotia, NY), Rutkowski; Stephen Francis (Duanesburg, NY), Petterson; Roger John (Fultonville, NY), Svec; Paul Steven (Scotia, NY)
General Electric Company (Niskayuna, NY)
10/ 652,906
September 2, 2003
GOVERNMENT RIGHTS STATEMENT This invention was developed through funding under Department of Energy contract DEAC05850R21400. The government may have certain rights under this Patent.