关键词: 快速凝固/粉末冶金, 金属基复合阻尼材料, 阻尼性能, 阻尼机制, 界面阻尼, 位错阻尼

Abstract: The damping property of Al-Fe-Mo-Si matrix composite damping materials Al-Fe-Mo-Si/Zn-Al and Al-Fe-Mo-Si/Al/Zn-Al prepared by rapidly solidified/powder metallurgy(RS/PM) process is studied by means of measure of dynamic mechanical property, and the damping mechanism of the materials is discussed. The results show that the damping capacity(Q ^-1) of two materials is (0.5～3.1)×10 ^-2 in the temperature range of 20～250℃.The damping property of Al-Fe-Mo-Si/Zn-Al having more Zn-Al and a higher ratio of extrusion is superior to Al-Fe-Mo-Si/Al/Zn-Al's. At low temperature, the main internal friction mechanism is dislocation damping which was induced by large extrusion deformation, while in the high temperature region, the influence of interface damping increases gradually. For thermal activation, the dislocation damping shows various mechanism with the increase of temperature, and the materials' internal friction machanism is determined by the two factors in common.

Key words: rapidly solidified/powder metallurgy, metal matrix composite damping materials, damping property, damping mechanism, interface damping, dislocation damping