Multilayer coating including disordered, wear resistant...

Details Multilayer coating including disordered, wear resistant... Multilayer coating including disordered, wear resistant...

B - Operations, Transporting

22

F

117/157, 204/96.

B22F 5/00 (2006.01) C23C 28/00 (2006.01) C23C 30/00 (2006.01)

Patent

CA 1248046

ABSTRACT A wear resistant multilayer coating is provided. The wear resistant coating comprises at least one internal layer and a thin, external layer of disordered boron and carbon applied to a substrate. The synergistic interaction of a hard internal layer and a lubricious boron and carbon layer provides a long lived tool coating. In a more spe- cific embodiment, the external layer of the coating is disordered boron carbide. In accordance with one embodiment, the disordered boron and carbon external coating is of a composition BxC1-x where x is from about 0.60 to about 0.90.

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