In the absence of any literature regarding the development of erosion resistance protective coatings on the aerospace engine parts using NiTi alloy, the current work has been focused on the detail investigation of the solid particle erosion resistance of the NiTi coating developed by atmospheric plasma spray technique. The coating has been prepared by considering an elemental mixture of equiatomic Ni and Ti powder as feedstock material with different plasma arc currents and primary gas flow rates. The quality of the coatings has been checked by different characterization techniques like x-ray diffraction, scanning electron microscopy and energy-dispersive spectroscopy. The defects observed from the microstructural investigation sometimes lead to more erosion and sometimes resulted in less erosion rate. The investigation of the effect of the porosity percentage on the erosion rate revealed that as the porosity percentage increases, the erosion rate increases at both 45° and 90° erodent impingement angles due to the lack in strength at the edges of the pores. Furthermore, the surface area of the roughness peaks, the stress concentration at the gap between the roughness peaks and height of the surface profile are mainly responsible for the erosion performance at both the erodent impact angles. The erosion rate is inversely proportional to the microhardness of the coatings. In addition to the above, according to the results disclosed by the erosion performance at different impingement angles, the coating is brittle in nature. The surface morphological study of the eroded coatings indicated various erosion mechanisms like plastic deformation, plowing, microcutting, lip formation, scratches, groove formation on the coatings impinged at 45° impact angle and groove formation, splat fracture, splat fragmentation, splat delamination, pit formation on the coatings impinged at 90° impingement angle.

在没有任何关于使用 NiTi 合金在航空发动机部件上开发耐腐蚀保护涂层的文献的情况下，目前的工作集中在详细研究大气等离子喷涂技术开发的 NiTi 涂层的固体颗粒耐腐蚀性能。通过考虑等原子镍和钛粉末的元素混合物作为具有不同等离子弧电流和初级气体流速的原料材料来制备涂层。涂层的质量已通过 X 射线衍射、扫描电子显微镜和能量色散光谱等不同的表征技术进行了检查。从微观结构研究中观察到的缺陷有时会导致更多的侵蚀，有时会导致更少的侵蚀率。对孔隙率对冲蚀率影响的研究表明，随着孔隙率的增加，由于孔隙边缘强度不足，在 45° 和 90° 冲蚀冲击角处的冲蚀率均增加。此外，粗糙度峰值的表面积、粗糙度峰值间隙处的应力集中和表面轮廓的高度对两种侵蚀冲击角的侵蚀性能都有主要影响。腐蚀速率与涂层的显微硬度成反比。除上述外，根据不同冲击角度下的侵蚀性能所揭示的结果，涂层本质上是脆性的。侵蚀涂层的表面形态研究表明了各种侵蚀机制，如塑性变形，