Chen Shunian, Yan Weiqing, Zhang Yifan, Chen Lin, Ouyang Xiaoping, Ouyang Xiao, Chen Jing, Liao Bin
Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China.
Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai 519087, China.
Materials (Basel). 2023 Aug 15;16(16):5629. doi: 10.3390/ma16165629.
AlCrTiZrMo high-entropy alloy (HEA) films with strong amorphization were obtained by co-filter cathode vacuum arc deposition, and the effect of thermal shock on the films was investigated in order to explore the protection mechanism of HEA films against mechanical components in extreme service environments. The results show that after annealing at 800 °C for 1 h, the formation of a dense ZrTiO composite oxide layer on the surface actively prevents the oxidation from continuing, so that the AlCrTiZrMo HEA film exhibits excellent oxidation resistance at 800 °C in air. In the friction-corrosion coupling environment, the AlCrTiZrMo HEA film annealed at 800 °C for 1 h shows the best tribocorrosion resistance due to the stable dense microstructure and excellent mechanical properties, and its ΔOCP, COF and wear rate possess the smallest values of 0.055, 0.04 and 1.34 × 10 mm·N·m.
通过共过滤阴极真空电弧沉积法制备了具有强非晶化的AlCrTiZrMo高熵合金（HEA）薄膜，并研究了热冲击对薄膜的影响，以探索HEA薄膜在极端服役环境中对机械部件的保护机制。结果表明，在800℃退火1 h后，表面形成致密的ZrTiO复合氧化层，有效阻止了氧化的继续进行，使得AlCrTiZrMo HEA薄膜在800℃空气中表现出优异的抗氧化性能。在摩擦-腐蚀耦合环境中，800℃退火1 h的AlCrTiZrMo HEA薄膜由于其稳定致密的微观结构和优异的力学性能而表现出最佳的摩擦腐蚀抗性，其开路电位变化量、摩擦系数和磨损率的最小值分别为0.055、0.04和1.34×10⁻⁶mm·N⁻¹·m。
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