| 摘要 |
<p>A self-lubricating composite material excellent in strength and high-temperature oxidation resistance and usable in the air and in vacuo. It is a composite Cu-Ni-Sn sinter containing 20-70 vol. % of a mixture of graphite particles and WS2 particles as the solid lubricant component and having a porosity of 25 vol. % or less. It has a structure wherein the solid lubricant particles are surrounded by a matrix comprising a two-phase alloy composed of Cu-Ni alloy particles and a single Sn phase or an intermetallic Sn-Ni compound dispersed uniformly in the grain boundary of the alloy particles to bond the particles to each other firmly. The matrix has an alloy composition comprising 5-40 wt. % of Ni, 4-15 wt. % of Cu and the balance consisting of Cu and unavoidable impurities.</p> |
