【摘要】 采用喷射共沉积方法制备了 60 61Al 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 15 0℃附近有一温度内耗峰 ,且随频率增加该峰峰位向高温移动 ,峰高降低。通过Arrhenius方程测得内耗峰的激活能为 1 17eV。分析认为 ,该峰具有弛豫特性 ,它是在热与应力的双重作用下 ,有位错拖曳点缺陷运动所致 ,符合位错诱生阻尼机制更多还原

【Abstract】 The damping properties of the 6061Al/SiC p/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 internal friction peak versus temperature about 150℃.Furthermore,the peak temperature increases with increasing frequencies,and the activation energy of the internal friction peak was calculated being 1 17eV by Arrhenius equation.Through a series of analyses,it is described that the internal friction peak is of relaxation 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.更多还原