Cu及其包覆金刚石微粒对镍基复合涂层组织性能的影响

Effect of Cu and Its Coated Diamond Particles on the Microstructure and Properties of Ni-based Composite Coatings

摘要:

采用感应加热技术制备了直接添加Cu和Cu包覆金刚石的镍基复合涂层。研究了Cu添加形式对金刚石镍基复合涂层的微观组织、物相演变、显微硬度和磨损性能的影响。结果表明：在金刚石镍基复合涂层中直接添加Cu和采用Cu包覆金刚石的形式引入Cu，均会抑制镍基合金基体中碳化物的生成，采用Cu包覆金刚石的形式添加时，在镍基合金基体中几乎观察不到碳化物；相较于直接添加Cu，采用Cu包覆金刚石涂层的平均显微硬度下降了76.7 HV，而且在磨粒磨损试验的15~45 min磨损阶段，涂层表现出更加优异的耐磨性。

Abstract:

Ni-based composite coatings with directly added Cu and Cu-coated diamond were prepared by induction heating technology. The effects of Cu addition on the microstructure, phase evolution, microhardness and wear properties of Ni-based composite coatings were investigated. The results show that the direct addition of Cu and the introduction of Cu in the form of Cu-coated diamond in the diamond-nickel-based composite coatings inhibit the generation of carbides in the nickel alloy matrix, and in the form of Cu-coated diamond, almost no carbides are observed in the nickel alloy matrix. The average microhardness of the coating with Cu-coated diamond is decreased by 76.7 HV compared to that of the direct addition of Cu; moreover, the coating shows more excellent wear resistance in the 15?45 min wear stage of the abrasive wear test.