The limited inter-lamellar bonding in the conventional thermal-sprayed 304SS coating usually leads to much lower corrosion and wear resistance than their bulk counterparts. In this study, Mo-clad stainless steel 304SS-17Mo powders prepared by mechanical alloying were used for plasma spraying to generate ultra-high-tempertature droplets to deposit the coatings with enhanced inter-lamellar bonding. The temperature at the interface between the molten splats and the stainless steel was calculated by numerical simulation, and the surface temperature of in-flight particles was measured by a commercial thermal spray particle diagnostic system. The microstructures of the coatings after etching were characterized to reveal inter-lamellar bonding. The adhesive and cohesive strengthes of the coatings were estimated by tensile and scratch tests. The measurement of the in-flight particle temperature reveals the possibility of creating a self-bonding effect, which is confirmed by microstructure examination, high adhesion over 66 MPa, and cohesion of 221 MPa.

常规热喷涂304SS涂层中有限的层间粘结通常会导致腐蚀和耐磨性远低于其整体同类产品。在这项研究中，通过机械合金化制备的包覆Mo的不锈钢304SS-17Mo粉末用于等离子喷涂，以产生超高温液滴，以增强层间键合沉积涂层。通过数值模拟计算熔融片与不锈钢之间的界面温度，并通过商业热喷涂颗粒诊断系统测量飞行中颗粒的表面温度。刻蚀后涂层的微观结构被表征为揭示层间键合。涂层的粘合强度和内聚强度通过拉伸和划痕测试进行评估。