摘要
采用空气加压渗流技术制备了宏观石墨颗粒增强铜基形状记忆合金复合材料,利用多功能内耗仪研究了其阻尼行为及阻尼机制。结果表明:复合材料的阻尼性能比基体合金的大大提高,其内耗随石墨颗粒体积分数的增加、石墨颗粒粒径的减小和应变振幅的增大而增大;基体和石墨颗粒的本征阻尼、位错阻尼和颗粒/基体界面阻尼是复合材料的主要阻尼机制。
A Cu-based shape memory alloy （SMA） composite reinforced with macroscopic graphite particulates （Gr/Cu-based SMA） was prepared by using air pressure infiltration process, and its damping behavior and damping mechanism were studied by using a multifunction internal friction apparatus. The results show that the damping capacity of the composite was higher than that of the matrix alloy, and the internal friction of the composite increased with the increase of graphite particulate volume fraction and strain amplitude, and with the decrease of the diameter of graphite particulates. The intrinsic damping of the substrate and the graphite particulates, dislocation damping and interface damping were the main damping mechanisms of the composite.
出处
《机械工程材料》
CAS
CSCD
北大核心
2012年第7期53-55,共3页
Materials For Mechanical Engineering
基金
安徽省高等学校青年教师科研资助计划自然科学项目(2005jq1104)
关键词
形状记忆合金
宏观石墨颗粒
复合材料
阻尼
shape memory alloy, macroscopic graphite particulate
composite
damping
