Plasma spraying was employed to deposit an Al coating in order to create a self-metallurgical bonding effect through impact-induced melting with highly overheated molten droplets. Numerical simulation was employed to estimate the interface temperature between the molten Al splat and the Al substrate. The interface bonding was examined from cross sections of the Al splat and the etched coatings. The results show that, with Al droplets higher than 1800°C, impact-induced Al substrate melting occurs. The measurements showed that, during spraying, most Al particles were heated to temperatures theoretically causing an impact-induced melting effect, which subsequently produces a metallurgical self-bonding effect. The observed results confirm the metallurgical bonding in plasma-sprayed Al coating.

中文翻译：

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通过新型自粘合策略增强层状粘合的等离子喷涂铝合金涂层

等离子喷涂被用来沉积铝涂层，以通过冲击诱导熔化与高度过热的熔滴产生自冶金结合效应。采用数值模拟来估计熔融铝板和铝基板之间的界面温度。从 Al splat 和蚀刻涂层的横截面检查界面结合。结果表明，当铝滴温度高于 1800°C 时，会发生冲击诱导的铝基体熔化。测量结果表明，在喷涂过程中，大多数铝颗粒被加热到理论上的温度，导致冲击诱导熔化效应，随后产生冶金自粘合效应。观察到的结果证实了等离子喷涂铝涂层中的冶金结合。