Scope of aluminium base bearing alloys

BEARING materials are special type of materials which carry a moving or rotating component with the least friction or wear. One of the principle difficulties in developing a good bearing material is that two practic-ally conflicting requirements are to be satisfied by a good hearing material. The material must be soft with extremely low shear strength as well as it must be
strong enough to support heavy dynamic loads. This is generally achieved either by having a bearing material with a metallurgical structure inherently incorporating
both hard and soft constituents; the soft, low melting constituent helping easy running of the moving parts
and the hard constituent bearing load, alternatively these might be a strong metal coated with a very thin overlay of soft metal.