The friction behavior of Al2O3 to friction pairs of hard-soft metal friction pairs is better than that of hard-hard metal friction pairs,and the add amount of Al2O3 should not be too high.

• Al2O3对硬-软金属配合的摩擦副作用效果强于对硬-硬金属配合的摩擦副,添加量不宜过高。