【摘要】 采用喷射共沉积方法制备了SiCP/6061Al复合材料,研究了五种热处理工艺对其阻尼性能和内耗峰的影响。结果表明:各种热处理状态试样,在150～200℃范围内均出现温度内耗峰,且随频率增加该峰峰位向高温移动,峰高增加。通过Arrhenius方程测得内耗峰的激活能均高于1eV;另外,不同的淬火处理对该内耗峰有明显影响,当淬火冷却速度高于水淬时,随冷却速度的加大,内耗峰峰位向高温移动。更多还原

【Abstract】 The effect of five typical heat treatment technologies on the damping properties and the damping peak of the SiCP/6061Al MMC, fabricated by spray atomization and deposition, was studied. The results show that the internal friction spectra of various heat treated samples exhibit the internal friction peak versus temperature between 150℃ and 200℃. Furthermore, the peak temperature and the peak height increase with increasing frequencies. By Arrhenius equation we can get the active energy of the damping peak, which is above 1 eV. On the other hand, different quenching treatments affect the damping peak remarkably; when the rate of cooling is above water quenching, the damping peak will shift to a higher temperature while enhancing the cooling speed.更多还原