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Abstract
Adhesion studies were conducted with copper, tungsten and oxidized tungsten contacting a nickel (111) surface. The copper, tungsten and oxidized tungsten were 1 mm diameter flat ended fibers. They contacted the nickel surface at loads of 20 to 150 milligrams with surface contact times of 10 to 300 seconds. The nickel (111) surface was examined before and after adhesion contact with LEED. With clean metals in adhesive contact, fracture in tension occurred in the lower cohesive strength material. When copper contacted nickel, a surface alloy formed. The adhesion of clean nickel to an oxidized tungsten surface resulted in oxygen transfer from tungsten to nickel with atomic surface rearrangement of the oxygen.
Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference held in Houston, Texas, October 14–16, 1969
Notes
Presented as an American Society of Lubrication Engineers paper at the ASLE/ASME Lubrication Conference held in Houston, Texas, October 14–16, 1969