In this paper, a new type of copper (Cu) matrix graphite composite was successfully prepared, which was reinforced with titanium nitride particles (TNPs) using powder metallurgy. These composites contained 2 wt % graphite as the lubricating phase and 1, 3, 5, 10, and 15 wt % TNPs as the reinforcing phase. The effects of different TNP contents on composite properties and the composites' wear mechanism were examined. The samples were characterized by microstructure, density, porosity, hardness, compressive yield strength, and friction wear testing. The results showed that, with TNP addition, the hardness, compressive strength, and friction and wear properties of the composites were improved. When the TNP content was >3 wt %, composite porosity gradually increased and the hardness, compressive strength, and friction and wear properties of the composites sharply decreased. With TNP addition, the main composite wear modes gradually changed from adhesive and abrasive wear to abrasive wear.

中文翻译：

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氮化钛颗粒对铜基石墨复合材料性能的影响

本文成功地制备了一种新型的铜（Cu）基石墨复合材料，该复合材料通过粉末冶金用氮化钛颗粒（TNP）增强。这些复合物包含2wt％的石墨作为润滑相和1、3、5、5、10和15wt％的TNP作为增强相。研究了不同TNP含量对复合材料性能和复合材料磨损机理的影响。通过微观结构，密度，孔隙率，硬度，压缩屈服强度和摩擦磨损测试对样品进行表征。结果表明，加入TNP后，复合材料的硬度，抗压强度，摩擦磨损性能均得到改善。当TNP含量> 3 wt％时，复合材料的孔隙率逐渐增加，硬度，抗压强度，复合材料的摩擦和磨损性能急剧下降。加入TNP后，主要的复合材料磨损模式逐渐从粘合剂和磨料磨损变为磨料磨损。