A friction-reducing coating with a lateral gradient and a method for producing the same

Abstract

This invention discloses a friction-reducing coating with a transverse gradient and its preparation method, belonging to the field of friction-reducing coating technology. The coating comprises a self-lubricating material powder and a metal powder bonded together; the ratio of the self-lubricating material powder to the metal powder varies gradient along a direction parallel to the friction surface; the self-lubricating material powder is selected from one or more of MoS2 and WS2; the metal powder is selected from one of Ti, Co, or Ni; the mass ratio of the self-lubricating material powder to the metal powder is (5-10):(0-5). Because the material properties gradually change along the direction of friction, the stress is more evenly distributed on the coating surface, no longer limited to the interface in the vertical direction, effectively reducing local stress concentration.

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