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通过真空热压烧结工艺制备了单一纳米、单一微米及其混合颗粒增强的Al-Si复合材料,测试了这些颗粒增强AlSi复合材料的摩擦磨损性能,并分析了其磨损机理。结果表明,与基体材料相比,颗粒增强Al-Si复合材料的体积磨损量明显降低,当纳米SiC_p含量为3%时,随着微米SiC_p含量的增加,纳微米SiC_p/Al-Si复合材料的体积磨损量先减小后增加。当增强颗粒含量为3%的纳米+15%的微米时,复合材料的体积磨损量最小,耐磨性较基体材料提高58.2%。利用扫描电镜对纳微米SiC_p/Al-Si复合材料的磨损形貌进行观察,发现复合材料的磨损机制主要为磨粒磨损。
The single-micron, single-micron and mixed-particle reinforced Al-Si composites were prepared by the vacuum hot-pressing sintering process. The tribological properties of the AlSi composites were tested and the wear mechanism was analyzed. The results show that compared with the matrix material, the volume loss of the Al-Si composites decreases obviously. When the nano-SiCp content is 3%, with the increase of the micro SiCp content, The volume of wear decreases first and then increases. When the particle content is 3% nano-particles + 15% micron, the volume loss of the composite is the smallest, and the wear resistance is increased by 58.2% compared with that of the matrix. The wear morphology of the nanometer SiC_p / Al-Si composites was observed by scanning electron microscopy. It was found that the wear mechanism of the composites was abrasive wear.