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采用粉末热挤压工艺制备硼酸镁晶须增强铝基复合材料,研究了晶须含量和载荷的变化对材料摩擦磨损性能的影响。结果表明,在恒定的速度和载荷下,硼酸镁晶须体积含量为2%时耐磨性最好,其磨损率为纯6061铝合金磨损率的62%。随着载荷的增大,复合材料的磨损率增加,并且高体积含量的复合材料磨损率呈现出更大的增加趋势。磨损表面分析表明:在较低负载下,6061铝合金的磨损机制以磨粒磨损为主,复合材料的磨损机制以轻微的粘着磨损为主;在较高负载时,6061铝合金和复合材料的磨损机制均由粘着磨损和磨粒磨损共同主导。
Magnesium borate whisker reinforced aluminum matrix composites were prepared by powder hot extrusion. The effects of whisker content and load on the friction and wear properties of the composites were investigated. The results show that under the condition of constant speed and load, the content of magnesium borate whiskers is the best when its volume content is 2%, and its wear rate is 62% of the wear rate of pure 6061 aluminum alloy. With the increase of load, the wear rate of the composites increases, and the wear rate of the composites with high volume content shows a greater increasing trend. The wear surface analysis shows that the wear mechanism of 6061 aluminum alloy is mainly abrasive wear under low load, and the wear mechanism of the composite material is mainly slight adhesive wear. At higher load, the wear mechanism of 6061 aluminum alloy and composite The wear mechanism is dominated by adhesive wear and abrasive wear.