论文部分内容阅读
作者利用透射电子显微镜对由粉末冶金方法制成的新型镍基高温自润滑复合材料进行了微观形貌的观察和选区电子衍射分析。结果表明,其基体为单一的α相,析出的碳化物为Ni_3C,基体中分布有反向畴界、孪晶、位错和堆垛层错等晶体缺陷,固体润滑剂石墨呈园片状,均匀分布,晶体结构为六方晶系,c/a=2.729。同时探讨了各相的形态和组织结构对材料的耐腐蚀、耐磨、自润滑及抗冲击性能的关系。
Using transmission electron microscopy, the authors observed the morphology and the selected area electron diffraction of a new nickel-based high-temperature self-lubricating composite made by powder metallurgy. The results show that the matrix is a single α phase and the precipitated carbides are Ni_3C. Crystal defects such as reverse domain boundary, twins, dislocations and stacking faults are distributed in the matrix. Uniform distribution, the crystal structure of the hexagonal system, c / a = 2.729. At the same time, the relationship between the morphology and microstructure of each phase on the corrosion resistance, wear resistance, self-lubrication and impact resistance of the material was also discussed.