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首页> 外文期刊>Materials >The Dry Sliding Wear Properties of Nano-Sized TiC p /Al-Cu Composites at Elevated Temperatures
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The Dry Sliding Wear Properties of Nano-Sized TiC p /Al-Cu Composites at Elevated Temperatures

机译：纳米TiC p / Al-Cu复合材料在高温下的干滑磨损性能

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摘要

Nano-sized ceramic particle reinforced aluminum composites exhibit excellent room-temperature mechanical properties. However, there is limited research on the dry sliding wear behavior of those composites at elevated temperatures, which should be one of the major concerns on elevated temperature applications. Here the Al-Cu composites reinforced with nano-sized TiC p were fabricated. The dry sliding wear behaviors of the nano-sized TiC p /Al-Cu composites at various temperatures (140–220 °C) and loads (10–40 N) with different TiC p contents were studied, and the results showed that the nanocomposites exhibited superior wear resistance. For instance, the relative wear resistance of the 0.5 wt.% nano-sized TiC p /Al-Cu composite was 83.5% higher than that of the Al-Cu matrix alloy at 180 °C under 20 N, and was also 16.5% higher than that of the 5 wt.% micro-sized TiC p /Al-Cu composite, attributed to the pronounced Orowan strengthening effect of nanoparticles. The wear rates of the nanocomposites were always lower than those of the Al-Cu matrix alloy under the same test condition, which increased with the increase in temperature and load and with the decrease in TiC p content.
机译：纳米尺寸的陶瓷颗粒增强铝复合材料具有出色的室温机械性能。但是，对这些复合材料在高温下的干滑磨损行为的研究很少，这应该是高温应用中的主要问题之一。在这里，制备了纳米尺寸的TiC p增强的Al-Cu复合材料。研究了纳米TiC p / Al-Cu复合材料在不同温度（140–220°C）和载荷（10–40 N）下具有不同TiC p含量时的干滑动磨损行为，结果表明，纳米复合材料表现出优异的耐磨性。例如，在180 N和20 N下，0.5 wt。％纳米尺寸TiC p / Al-Cu复合材料的相对耐磨性比Al-Cu基合金的相对耐磨性高83.5％，并且也高16.5％。比5wt。％的TiC p / Al-Cu复合材料的纳米颗粒的Orowan增强作用强。在相同的测试条件下，纳米复合材料的磨损率始终低于Al-Cu基合金，随着温度和载荷的增加以及TiC p含量的降低而增加。

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