搅拌摩擦加工制备的MWCNTs／Mg复合材料的阻尼性能

Damping capacity of MWCNTs/ Mg composites prepared by friction stir processing

采用搅拌摩擦加工法制备不同含量多壁碳纳米管镁基复合材料(MWCNTs/Mg),并对该复合材料的显微结构和阻尼性能进行分析。结果表明:MWCNTs/Mg复合材料的高温阻尼性能较基体的高温阻尼性能有一定程度的提高;MWCNTs的添加量越大,MWCNTs/Mg复合材料的阻尼性能增加越大;MWCNTs/Mg复合材料的阻尼—温度曲线出现了两个内耗峰。MWCNTs/Mg复合材料阻尼性能受频率影响随温度区间的变化而不同。

The multi-walled carbon nanotubes （MWCNTs） reinforced Mg matrix composites were prepared by friction stir processing （FSP）. The microstructure and damping properties of the composites were investigated. The results show that the high temperature damping capacity of MWCNTs/Mg composite is better than that of the base metal. The larger the amounts of MWCNTs adds into the matrix, the higher the damping capacities of the MWCNTs/Mg composites are. Furthermore, there are two internal friction peaks in the damping-temperature curves of the MWCNTs/Mg composites. The damping capacities of MWCNTs/Mg composites materials are affected by frequency variation with change of the temperature ranges.