Abstract In this study, the microstructure and wear behaviours of aluminium composites, reinforced with different amounts of (3-12%) Al2O3 and 2% (% vol.) graphite were investigated. The Al2O3 and graphite were added to Al matrix and mechanically alloyed for 60 minutes. Subsequently, the mechanically alloyed powders were pressed under 700MPa pressure and sintered at 600∘C for 120 minutes. The produced aluminium composites were characterized by microstructure, scanning electron microscope (SEM), X-ray diffraction (XRD), density and hardness measurements. Afterwards, wear tests were carried out on a block on-ring type wear testing device, under three different loads and four different sliding distances. As a result, the hardness and density of composites were observed to increase due to the increase in the amount of reinforcement in aluminium composites. The highest hardness and density values were obtained in composite material containing 12% Al2O3. The wear tests, the lowest weight loss was also obtained in composite containing 12% Al2O3.

中文翻译：

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Al+2%石墨基复合材料Al2O3含量与磨损行为的关系

摘要 在这项研究中，研究了用不同量 (3-12%) Al2O3 和 2% (% vol.) 石墨增强的铝复合材料的微观结构和磨损行为。将 Al2O3 和石墨添加到 Al 基体中并机械合金化 60 分钟。随后，将机械合金化粉末在 700MPa 压力下压制并在 600∘C 下烧结 120 分钟。通过微观结构、扫描电子显微镜 (SEM)、X 射线衍射 (XRD)、密度和硬度测量对生产的铝复合材料进行表征。随后，在块环式磨损试验装置上进行了三种不同载荷和四种不同滑动距离下的磨损试验。因此，由于铝复合材料中增强量的增加，观察到复合材料的硬度和密度增加。在含有 12% Al2O3 的复合材料中获得了最高的硬度和密度值。在磨损测试中，含有 12% Al2O3 的复合材料也获得了最低的重量损失。