Diffusion barrier layer for multi-layer plain bearings with cast-on babbit metal

摘要

A plain bearing of the kind including a high-strength supporting bush, such as of steel, a resistant intermediate layer of bearing metal, particularly of lead bronze or aluminium- tin, and a bearing layer of babbit metal has a galvanically applied thin layer of iron between the intermediate layer and the layer of babbit metal to prevent the formation of a brittle intermetallic phase at the boundary face of the intermediate layer and the layer of babbit metal. Preferably the bearing includes a galvanically deposited layer of nickel or copper between the iron layer and the intermediate layer.