摘要
为提高铝合金的阻尼性能,采用压力浸渗法制备50vol%空心微珠/ZL102复合材料,通过动态热机械分析仪研究复合材料在不同条件下的阻尼行为。结果表明,在20～180℃,复合材料的阻尼性能高于基体合金;室温时,复合材料的阻尼性能约为4.5×10-3,与基体相比提高了约一倍,相同体积分数时,复合材料的阻尼性能与空心微珠的粒径成反比。复合材料阻尼性能提高的主要原因是位错阻尼和界面阻尼以及第二相的孔洞效应。
In order to improve the damping properties of aluminium alloy, aluminium matrix cenosphere composites were produced through pressure infiltration. Damping properties of composite were investigated in different conditions by dynamic mechanical and thermal analyzer. The results show that the damping properties of composite are better than aluminum matrix alloy during 20 -180℃. At room temperature, the damping value of composite is about 4.5×10^-3, which is about 2 times than that of aluminum matrix alloy. It increases while the size of cenosphere reduces. The main damping mechanisms are dislocation damping, interface damping and porosity effect of second phase.
出处
《热加工工艺》
CSCD
北大核心
2009年第10期128-130,共3页
Hot Working Technology
关键词
空心微珠
复合材料
压力浸渗
阻尼性能
cenosphere
composite
pressure infiltration
damping property
