Patent ID: 7862768

Claim:
A method for manufacturing a plain bearing, a. wherein: said plain bearing comprises (1) a base material formed of an aluminum alloy that does not contain tin; and (2) a tin-and-silicon rich layer formed of an aluminum alloy consisting essentially of aluminum, tin and silicon, the tin-and-silicon-rich layer being adjacent to the base material and having a sliding surface; wherein the sliding surface has an area ratio of tin phase in a range of 6 to 40%, and an area range of silicon phase in a range of 15 to 25%; b. the method comprising: i. providing a base material formed of an aluminum alloy that does not contain tin; ii. bombarding the surface of the base material with a powder of at least one of (a) solid particles of tin and (b) powder of solid particles of an aluminum-tin alloy, and at least one of (c) silicon powder of solid particles or (d) powder of solid particles of an aluminum-silicon alloy, so as to form a layer containing tin and silicon; and iii. rolling and annealing to form the tin-and-silicon rich layer in which the tin phase and the silicon phase are crystallized and distributed in an aluminum alloy matrix.