メカニカルアロイングで作られたCu-Ti非晶質合金の摩耗特性

概要

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Cu-50mass%Ti amorphous alloy powder was prepared by mechanical alloying and then sintered under pressure of 1560MPa at 600K. Wear experiments were carried out by a pin-ring type wear testing machine at various sliding speeds and at a contact pressure of 0.75MPa under unlubricated condition. The re-sults obtained are as follows: 1) The wear rate increases with the increasing sliding speed up to V=1.0m/s, due to breaking-away of the amorphous phase at the true contact part between the specimen and the counter face of steel. 2) Under condition of the sliding speed from V=1.2 to 1.6m/s, the wear rate of the amorphous alloy decreases due to the formation of oxide particles. 3) When the amorphous alloy was slid at the sliding speed over V=1.6m/s, the wear rate increases remarkably due to the crystallization from the amorphous phase at the contact part and the adhesion to the counter face. 4) The value of wear rate in the sintered amorphous alloy is smaller than that of the sintered crystalline alloy underthe same sliding condition.
社団法人粉体粉末冶金協会の論文