vacuum-arc casting

vacuum-arc casting

[‚vak·yəm ‚ärk ′kast·iŋ]
(metallurgy)
A process for producing metal ingots that are low in oxygen and need no further treatment to remove it, whereby an ultrapure metal or metal alloy powder is pressed, sintered, and melted (all under vacuum).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.