Sn同士およびZn同士の摩擦における移着粒子の成長促進に対する酸素の効果

抄録

Wear experiments were carried out on self-mated couples of Sn vs. Sn and Zn vs. Zn. An environmental controlled pin-on-disk test rig was used in which oxygen pressure can be varied from 10^-4Pa to 10⁵Pa. The coeficient of friction decreased when oxygen pressure was increased. This also resulted in an increase in the size of individual wear particles. The hardnesses of the transfer particle and rubbing pin and disk were measured after stopping the experiment. It showed that the transfer particle was approximately ten percent harder than the mating rubbing material. The high rate of wear in higher oxygen pressure, was attributed to the increase in the shear strength at the interface by oxide formation. According to the adhesion theory of wear, the amount of wear correlates positively with friction. On the other hand, our study shows that the change of shear strength at the interface is responsible for an increase in wear particle formation.