Jul 28 1991
From The Space Library
The Chicago Tribune reported that Northwestern University scientists had discovered a process called sputtering that can coat hardened steel with titanium nitride films a few microns thick and double its hardness. The computer-controlled system was built for Northwestern's Basic Industrial Research Laboratory (BIRL) in a project that also involved funds from NASA and the Department of Energy. (C Trin, Jul 28/91)
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