International Journal of Refractory Metals & Hard Materials ( IF 3.6 ) Pub Date : 2022-08-02 , DOI: 10.1016/j.ijrmhm.2022.105963 Junbo Liu , Qianbing You , Yunliang Huo , Ji Xiong , Zhixing Guo , Lu Yang , Hong Zhang , Jianfeng Zhao , Longgang Wang
The research was aiming at exploring a novel approach to manufacture high tribological performance cermets by treating in a high-speed changing dynamic temperature field. Results showed that with the method, carbon atoms migrated from the subsurface region to the surface region. Atoms escaped from the crystals and large-angle boundaries (>10°) and dislocation were formed. During ball-on-disk wear tests at 800 °C, fine furrows with a smallest depth of 8 μm was obtained on the cermets after treated for 30 cycles, which showed highest Vicker hardness of 1810 HV30 and best toughness of 9.7 MPa.m1/2 due to the strengthening effect of large angle boundaries and dislocations. The cermets after treated for 100 cycles displayed the lowest COF of 0.17 due to graphite phase formed by carbon atoms migration.
中文翻译:
高速变化的动态温度场中碳原子的定向扩散和晶格畸变——一种制备高摩擦学性能金属陶瓷的新方法
该研究旨在探索一种通过在高速变化的动态温度场中处理来制造高摩擦性能金属陶瓷的新方法。结果表明,通过该方法,碳原子从地下区域迁移到表面区域。原子从晶体中逸出并形成大角度边界(> 10°)和位错。在800℃的球盘磨损试验中,经过30次循环处理后,金属陶瓷上出现了最小深度为8 μm的细沟,其维氏硬度最高为1810 HV 30,最佳韧性为9.7 MPa.m 1/2由于大角边界和位错的强化作用。由于碳原子迁移形成的石墨相,处理 100 次循环后的金属陶瓷显示出最低的 COF 为 0.17。