ＦＲＭの固体粒子衝突エロージョン特性

Abstract

Experiments were carried out to study the effects of fiber volume contents, type of reinforcement fibers, and impact angle on the solid particle erosion behavior of fiber reinforced metals (FRMs). Three kinds of FRMs were used for the erosion experiments. They were the aluminum 6061 alloy reinforced by βSi3N4 whiskers, the aluminum 1070 alloy unidirectionally reinforced by Si-Ti-C-O fibers and the aluminum reinforced by SiC plain-woven cloths. The erodent particles used in the experiments were SiC abrasives with the diameters of 100μm to 150μm.The results obtained are summarized as follows:(1) In general, the erosion rate is larger in FRMs than in the corresponding matrix materials.(2) In the case where the size of reinforcement fibers is much smaller than that of the particles impacted, almost all the fibers removed from FRM are included in the matrix material removed by the impact of particles. In this case, the difference in erosion rate is small between FRM and the corresponding matrix material.(3) In the case where the reinforcement fibers exist in the form of unidirectionally long fibers or cloths, a lot of fibers are removed from the eroded surface of FRM. In this case, FRM has much larger erosion rate than the corresponding matrix material.