高阻尼6013Al/SiC_p/Gr复合材料中的内耗峰及其阻尼机制  

Internal friction peak and its damping mechanism in high damping 6013Al/ SiC_p/Gr hybrid metal matrix composite

作　　者：顾敏[1] 顾金海[2] 沈宁福[1] 王西科[1] 张迎元[3] 顾明元[2] 乐永康[3] 

机构地区：[1]郑州大学材料研究中心 [2]上海交通大学金属基复合材料国家重点实验室,上海200030 [3]洛阳船舶材料研究所,河南洛阳471039

出　　处：《航空材料学报》2003年第1期24-28,共5页Journal of Aeronautical Materials

基　　金：河南省自然科学基金项目(004041100)。

摘　　要：采用喷射共沉积方法制备了6013Al/SiCp/Gr混杂金属基复合材料(MMC),研究了其阻尼性能。结果表明:该材料在150～200℃有一温度内耗峰,随频率增加该峰峰位向高温移动。升降温测得该内耗峰的激活能分别为2.21eV和1.27eV,且降温测试时出现的内耗峰与升温测试时的内耗峰相比,峰位显著向低温移动,峰高降低。分析认为,该峰为非线性弛豫型内耗峰,它是在热与应力的双重作用下,由位错拖曳点缺陷运动所致,符合位错诱生阻尼机制。The damping properties of 6013Al/SiCp/Gr hybrid MMC, which was fabricated by spray atomization and deposition, were studied. The results show that the internal friction spectra of the samples exhibit an internal friction peak between 150°C to 200°C. Furthermore, The peak temperature increases with increasing frequencies. When measured in the condition of increasing temperature and reducing temperature, the activation energy of the internal friction peak was calculated being 2.21 eV and 1.27 eV respectively by Arrhenius equation. The peak temperature and peak height measured in the condition of increasing temperature decrease as compared with those in the condition of reducing temperature. The internal friction peak is a relaxation non-linear model, and results from the dislocation movement, dragging the point defect under the double action of heat and stress. Its mechanism is of the dislocation-induced damping.

关 键 词：喷射共沉积方法 力学性能 6013Al/SiCp/Cr复合材料 内耗峰 阻尼机制 

分 类 号：TB333[一般工业技术—材料科学与工程]