Boron doped Ni₃Al intermetallic and in-situ Cr₇C₃ composite metal-ceramic powder were prepared by inert gas atomization method, and then the coating was prepared by HVOF. The Ni₃Al alloys wet the in-situ ceramic particles well and form a continuous internal acicular crystalline phase. Mechanical property and wear performance testing showed the hardness, thermal shock performance and wear resistance of the coating are retained to temperatures of at least 700 °C. All mechanical properties in the range of 450–700 °C were found to be equal to or higher than comparable NiCr-based NiCr–Cr₃C₂ coating systems. Initial mechanism study shows that the small size and needle-like morphology of the ceramic particles are the important reasons for the good high temperature properties of the coating.

采用惰性气体雾化法制备掺硼Ni ₃ Al金属间化合物和原位Cr ₇ C ₃复合金属陶瓷粉末，然后采用HVOF制备涂层。Ni ₃ Al合金很好地润湿原位陶瓷颗粒并形成连续的内部针状晶相。机械性能和磨损性能测试表明涂层的硬度、热冲击性能和耐磨性在至少 700°C 的温度下保持不变。发现 450–700 °C 范围内的所有机械性能等于或高于可比较的基于 NiCr 的 NiCr–Cr ₃ C ₂涂层系统。初步机理研究表明，陶瓷颗粒的小尺寸和针状形态是涂层具有良好高温性能的重要原因。