In the current investigation, an atmospheric plasma spray technique has been adopted to coat the NiTi material on the mild steel substrate. The coatings have been developed by varying powder feed rates. The microhardness and adhesion strength of the coatings have been evaluated and analysed. It has been observed that the microhardness and adhesion strength of the coating developed at 60 g min⁻¹ depicted the best results. The coatings fabricated by low powder feed rates have evaporation, over melting and low deposition efficiency which leads to the decrease in microhardness and adhesion strength value. Furthermore, the coatings developed at a very high powder feed rate having a lack of heat transfer between plasma and particles and change in trajectories of the particles which leads to increase unmelted particle formation, porosity, and microcracks. This results in a decline in microhardness and adhesion strength of the coating.

在目前的研究中，采用大气等离子喷涂技术在低碳钢基材上涂覆 NiTi 材料。涂层是通过改变粉末进料速率开发的。涂层的显微硬度和附着强度已被评估和分析。已经观察到涂层的显微硬度和附着强度在 60 g min ^-1描绘了最好的结果。低送粉率制备的涂层存在蒸发、过度熔化和低沉积效率，导致显微硬度和粘附强度值下降。此外，涂层以非常高的粉末进料速率形成，缺乏等离子体和颗粒之间的热传递，并且颗粒轨迹的变化导致未熔化颗粒的形成、孔隙率和微裂纹增加。这导致涂层的显微硬度和附着强度下降。