Multi-layer wear resistant coatings

Details Multi-layer wear resistant coatings Multi-layer wear resistant coatings

1988-10-11

1990-02-27

Rutledge, L. Dewayne

Stock material or miscellaneous articles

All metal or with adjacent metals

Having composition, density, or hardness gradient

428627, 428628, 428629, 428635, 428660, 428336, 428698, 428702, 416241B, B32B 1504

Patent

active

049045423

ABSTRACT:
An erosion and corrosion resistant coating is formed of a plurality of alternating layers of metallic and ceramic materials. The two materials selected for the layers have complementary wear resistant characteristics, such that one is relatively ductile and the other is relatively brittle. The concentration of the two materials at the interface between adjacent layers is graded to improve the adhesion of the layers and to provide a more unified coating. Prefereably radio-frequency sputtering is employed to deposit the coating, since it does not produce excessive heating which could negate any prior heat treatment of the substrate onto which the coating is deposited.

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