论文部分内容阅读
以超音速等离子喷涂系统(HEPJet)为平台,采用铝包镍(Al/Ni)自粘结粉末,借助Spray Watch2i在线监测系统、扫描电子显微镜(SEM)、X射线衍射仪(XRD)和WE-10A万能拉伸试验机,研究了超音速等离子喷涂Al/Ni粒子的速度、温度及涂层的组织性能。研究结果表明:超音速等离子喷涂Al/Ni自粘结粉末时,与普通火焰喷涂不同,射流中无明显的放热反应特征,涂层中也未发现Al-Ni化合物;超音速等离子的喷涂功率、喷涂距离等参数对Al/Ni喷涂粒子的状态和涂层组织性能影响显著,当功率为54.6kW、喷涂距离为150mm时,Al/Ni涂层组织致密,与基体的结合强度高达56MPa。
Based on the HEPJet system, Al-Ni self-bonding powder was prepared by means of Spray Watch2i online monitoring system, scanning electron microscopy (SEM), X-ray diffraction (XRD) and WE- 10A universal tensile testing machine to study the speed, temperature and the microstructure and properties of supersonic plasma sprayed Al / Ni particles. The results show that the supersaturated plasma sprayed Al / Ni self-bonding powder has no obvious exothermic reaction characteristic in the jet and no Al-Ni compound in the jet, which is different from the ordinary flame spraying. The spray power of the supersonic plasma , Spraying distance and other parameters have great influence on the state of Al / Ni sprayed particles and the microstructure and properties of the coating. When the power is 54.6kW and spraying distance is 150mm, the microstructure of Al / Ni coating is dense and the bonding strength with matrix is up to 56MPa.