THE HETEROGENEITY OF MECHANICAL PROPERTIES IN THE MICROZONE OF METAL MATRIX COMPOSITES
金属基复合材料微区力学性能的不均匀现象

Ultramicrohardness tester has been used to test the hardness in the different microzones ofaluminum matrix composites reinforced by fibers or particulates. It is found that the ultramicrohardness value increases apparently near the interface, and that the hardness has an intimate relation with the propertiesof reinforcement and the matrix, the characteristic of the interface and the size, shape and distribution of thereinforcement. The heterogeneity will affeCt the macroscopic properties and the size stability of the comPOsites.