The Dry Sliding Wear Properties of Nano-Sized TiC(p)/Al-Cu Composites at Elevated Temperatures.
The Dry Sliding Wear Properties of Nano-Sized TiC(p)/Al-Cu Composites at Elevated Temperatures.
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高温下纳米 TiCp/Al-Cu 复合材料的干滑动磨损性能
DOI：
10.3390/ma10080939
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发表时间：
2017-08-11
期刊：
影响因子：
--
通讯作者：
Jiang QC
中科院分区：
文献类型：
--
作者：
Tian WS;Zhao QL;Zhao CJ;Qiu F;Jiang QC
纳米陶瓷颗粒增强铝复合材料表现出优异的室温机械性能。然而，对这些复合材料在高温下的干滑动磨损行为的研究有限，这应该是高温应用的主要关注点之一。这里制备了纳米 TiCp 增强的 Al-Cu 复合材料。研究了不同TiCp含量的纳米TiCp/Al-Cu复合材料在不同温度（140~220℃）和载荷（10~40N）下的干滑动磨损行为，结果表明纳米复合材料表现出优异的耐磨性。例如，在180℃、20N下，0.5wt.%纳米TiCp/Al-Cu复合材料的相对耐磨性比Al-Cu基合金高83.5%，也比5wt.%微米TiCp/Al-Cu复合材料高16.5%，这归因于纳米粒子显着的Orowan强化效应。在相同的试验条件下，纳米复合材料的磨损率始终低于Al-Cu基合金，且随着温度和载荷的增加以及TiCp含量的减少而增加。
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 TiCpwere fabricated. The dry sliding wear behaviors of the nano-sized TiCp/Al-Cu composites at various temperatures (140–220 °C) and loads (10–40 N) with different TiCpcontents 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 TiCp/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 TiCp/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 TiCpcontent.
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