Bearing composites made from aluminium and aluminium bronze chips

The good bearing materials can be made from the compacted mixture of aluminium and aluminium bronze chips without participation of metallurgical processes. The parameters to obtain a good bonding of aluminium and CuAl8 aluminium bronze chips separated by a layer of oxide can be determined on the base of the new form of sintering criterion. Diffusion bonding process of aluminium and aluminium bronze chips leads to creation of the phases typical for Cu–Al equilibrium diagram. Because during the hot extrusion the diffusion bonding is very slow, after extrusion heat treatment must be applied.