的内耗峰及其阻尼机制
(1. 郑州大学 材料研究中心， 郑州 450002；
2. 郑州机械研究所， 郑州 450052；
3. 洛阳船舶材料研究所， 洛阳 471039)
摘 要: 采用喷射共沉积方法制备了SiCp/Gr/6061铝合金混杂金属基复合材料，研究了其阻尼特性。 结果表明： 该材料在150℃附近有一温度内耗峰，且随频率增加该峰峰位向高温移动而峰高降低。 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， 由位错拖曳点缺陷运动所致， 符合位错诱生阻尼机制。
关键字: 喷射共沉积； SiCp/Gr/6061铝合金混杂复合材料；内耗峰；阻尼机制
（1. Materials Research Center, Zhengzhou University,
Zhengzhou 450002, China;
2. Zhengzhou Research Institute of Mechanical Engineering,
Zhengzhou 450052, China;
3. Luoyang Ship Materials Institute, Luoyang 471039, China）
Abstract:Damping properties of the SiCp/Gr/6061Al alloy 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 at about 150℃. Furthermore, the peak temperature increases with increasing frequencies, and the activation energy of the internal friction peak is calculated to be 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.
Key words: spray atomization and deposition; SiCp/Gr/6061 alloy MMC; internal friction peak; damping mec
