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利用高剪切液态搅拌专利技术制备了5%Gr/A356、15%SiCp/A356、5%Gr+15%SiCp/A356铝基复合材料,对所制备复合材料的金相组织、力学性能和阻尼特性进行了初步分析。结果表明:利用高剪切液态搅拌专利技术能够成功制备出SiC颗粒和Gr颗粒分布均匀的高阻尼铝基复合材料,颗粒的体积分数可以精确控制。SiC颗粒和Gr颗粒作为增阻剂可以提高复合材料的阻尼特性,当阻尼测试频率为1Hz时,Gr颗粒界面间粘滞性损耗作用显著。以位错运动内耗为主的情况下,复合材料的阻尼性随震动频率的升高而增加。
The 5% Gr / A356, 15% SiCp / A356, 5% Gr + 15% SiCp / A356 aluminum matrix composites were prepared by patented high shear liquid mixing technique. The microstructure, mechanical properties and damping of the composites Characteristics of a preliminary analysis. The results show that the high damping aluminum matrix composite with uniform distribution of SiC particles and Gr particles can be successfully prepared by the patented high shear liquid mixing technology. The volume fraction of the particles can be precisely controlled. SiC particles and Gr particles as the drag reducing agent can improve the damping properties of the composites. When the damping test frequency is 1Hz, the viscous loss of Gr particles interfacial obviously. In the case of dislocation-induced internal friction, the damping of the composites increases with the increase of vibration frequency.