SLIDE MEMBER MADE OF SINTERED ALUMINIUM ALLOY

摘要

A slide member made of a sintered aluminum alloy includes a matrix (1) of an aluminum alloy and an aluminum nitride film (2) dispersed along the powder boundary of this matrix. When a state in which the aluminum nitride film (2) encompasses completely and continuously the old powder boundary is defined as a dispersion ratio of 100 %, the aluminum nitride film (2) is dispersed discontinuously at a dispersion ratio of not higher than 80 %. The reaction between aluminum and nitrogen is promoted by utilizing exothermicity due to the precipitation of elements existing in the solid solution state in the aluminum alloy by heating and keeping a powder molded article consisting of quenched and solidified aluminum alloy powder in a nitrogen gas atmosphere, and an aluminum nitride film is formed on the surface of aluminum alloy powder. <IMAGE>