Abstract: A method of treating a surface of a stacked aluminum alloy ingot during a heating process. Spacer blocks are positioned adjacent aluminum alloy ingots to form a stack, wherein the spacer block has a support surface contacting a contact surface of the aluminum alloy ingot, and at least one of the support surface and the contact surface include a fluorine containing material. The stack is heated to at least a temperature at which the fluorine containing material decomposes or vaporizes such that a layer of a fluorinated oxide compound is formed at the interfaces between the ingots and the spacer blocks.
Type:
Grant
Filed:
April 22, 2002
Date of Patent:
December 30, 2003
Assignee:
Alcca Inc.
Inventors:
Joseph P. Harenski, Roger W. Kaufold, Brian J. Morrissey, Robert L. Shadwick, Jr., Larry F. Wieserman