【摘要】 通过压力浸渗法制备玻璃空心微珠增强铝基复合材料，从而改善其阻尼特性。采用透射电子显微镜和扫描电子显微镜对复合材料的显微组织进行表征。使用动态机械热分析仪测定低频阻尼特性，旨在探讨阻尼能力随应变、温度和频率变化的趋势。研究结果表明，阻尼值随着温度和应变的增加而增大，其最大值为0.15。此外，当频率增加时，阻尼值降低。应变下的位错阻尼和温度下的界面阻尼是两种主要的阻尼机制。热处理后，位错强钉扎点密度的增加降低了阻尼值，这是因为热处理增强了复合材料的界面结合力。更多还原

【Abstract】 The damping properties were improved by preparing Al matrix composites reinforced with glass cenospheres through the pressure infiltration method. Transmission electron microscopy and scanning electron microscopy were employed to characterize the microstructure of the composites. The low-frequency damping properties were examined by using a dynamic mechanical thermal analyzer, aiming at exploring the changing trend of damping capacity with strain, temperature, and frequency. The findings demonstrated that the damping value rose as temperature and strain increased, with a maximum value of 0.15. Additionally, the damping value decreased when the frequency increased.Dislocation damping under strain and interfacial damping under temperature served as the two primary damping mechanisms. The increase in the density of dislocation strong pinning points following heat treatment reduced the damping value, which was attributed to the heat treatment enhancement of the interfacial bonding force of the composites.更多还原