In this study, we report on the microstructure and tribological characterization of in-situ TiC and γ’-Ni₃(Al,Ti) reinforced γ-Ni(Al,Ti) matrix composites, synthesized by in-situ reaction of Maxthal211 (Ti₂AlC-Ti₃AlC₂, MAX phase) and Ni precursors. Three composites were elaborated from 10, 20 and 30 wt% of the MAX phase precursor which fully reacted with Ni-matrix at 1080 °C sintering temperature for 4 h; the MAX phase decomposed into TiC, and the released Al and Ti atoms diffused in Ni matrix forming γ-Ni(Al,Ti) solid solution and γ’-Ni₃(Al,Ti) intermetallic. Scanning Electron Microscopy (SEM), X Rays Diffraction (XRD) and Raman spectroscopy were used to study the different microstructures and worn surface characteristics. Dry sliding properties of the composites under different normal loads were studied using a ball-on-disc tribometer. Addition of 10 wt% MAX phase procured the highest hardness (1.35 GPa) which is two times higher than that of pure Ni. Whereas all the reinforced composites exhibited better wear resistance. The formation of a lubricious layer during sliding and the good in-situ bonding between Ni/reinforcement phases, were the main cause to the enhanced wear resistance.

在这项研究中，我们在微结构和原位TiC和摩擦学特性报告γ'-的Ni ₃的（Al，Ti）的增强γ-镍的（Al，Ti）的基复合材料，通过原位Maxthal211的反应合成（钛₂ AlC-Ti ₃ AlC ₂，MAX相）和Ni前驱体。分别从10、20和30重量％的MAX相前驱体中制备了三种复合物，它们在1050°C的烧结温度下与Ni基体充分反应了4 h。MAX相分解成TiC，释放的Al和Ti原子扩散到Ni基体中，形成γ- Ni（Al，Ti）固溶体和γ'- Ni ₃（Al，Ti）金属间化合物。使用扫描电子显微镜（SEM），X射线衍射（XRD）和拉曼光谱研究了不同的微观结构和磨损的表面特性。使用圆盘摩擦计研究了在不同法向载荷下复合材料的干滑性能。加入10 wt％的MAX相可获得最高的硬度（1.35 GPa），是纯Ni的两倍。而所有增强复合材料均表现出更好的耐磨性。滑动过程中润滑层的形成以及Ni /增强相之间良好的原位结合是造成耐磨性增强的主要原因。