Role of Al2O3 fiber in eutectic Al-Si alloy composites
来源期刊：中国有色金属学报(英文版)2002年第5期
论文作者：翟秋亚 徐锦锋 Y. Iwai
文章页码：904 - 908
Key words：Al2O3 fiber; eutectic Al-Si alloy; composite; wear mechanism
Abstract: The effects of Al2O3 fiber on wear characteristics of eutectic Al-Si alloy composites were studied using a pin-on-disk tester under dry sliding condition. The results show that the Al2O3 fiber can make matrix grain be fine, specially the eutectic Si be finer and prevent the plastic flow of matrix and prohibit the crack propagation in the wear layer, thereby it can remarkably improve the mechanical property and the wear resistance of the MMCs. Since (Al2O3) fiber plays a role of certain framework in protecting the matrix against crash, it can eliminate the severe wear of MMCs with higher φf of fiber from the beginning of test. At mild stage, when φf is in the range of 8%~10%, the wear rates are the lowest. With increasing φf of Al2O3 fiber, the wear mechanism of MMCs can be transformed from adhesive delamination to brittle breakaway.
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