文献类型：期刊文献

英文题名：Corrosion Resistance and Wear Properties of CoCrFeNiMn/TiC High-Entropy Alloy-Based Composite Coatings Prepared by Laser Cladding

作者：Zhan, Qiang[1,2,3,4];Luo, Fangyan[4];Huang, Jiang[4];Wang, Zhanshan[1];Ma, Bin[1];Liu, Chengpu[2,3]

机构：[1]Tongji Univ, Inst Precis Opt Engn, Sch Phys Sci & Engn, Shanghai 200092, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab Ultraintense Laser Sci & Technol, Shanghai 201800, Peoples R China;[3]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China;[4]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Peoples R China

年份：2025

卷号：13

期号：5

外文期刊名：LUBRICANTS

收录：SCI-EXPANDED(收录号：WOS:001496717300001)、、EI(收录号：20252218511410)、WOS

基金：This research was funded by the National Natural Science Foundation of China (12074398).

语种：英文

外文关键词：CoCrFeNiMn high-entropy alloys; TiC powders; laser cladding; ceramics

外文摘要：CoCrFeNiMn high-entropy alloy (HEA) composite coatings with 0, 10, and 20 wt% TiC are synthesized through laser cladding technology, and their corrosion and wear resistance are systematically investigated. The X-ray diffraction (XRD) results show that with the addition of TiC, the phases of TiC and M23C6 are introduced, and lattice distortion occurs simultaneously (accompanied by the broadening and leftward shift of the main Face-Centered Cubic (FCC) peak). Scanning electron microscopy (SEM) reveals that the incompletely melted TiC particles in the coating (S2) are uniformly distributed in the matrix with 20 wt% TiC, while in the coating (S1) with 10 wt% TiC, due to gravitational sedimentation and decomposition during laser processing, the distribution of the reinforcing phase is insufficient. When rubbed against Si3N4, with the addition of TiC, S2 exhibits the lowest friction coefficient of 0.699 and wear volume of 0.0398 mm3. The corrosion resistance of S2 is more prominent in the simulated seawater (3.5 wt% NaCl). S2 shows the best corrosion resistance: it has the largest self-corrosion voltage (-0.425 V vs. SCE), the lowest self-corrosion current density (1.119 x 10-7 A/cm2), and exhibits stable passivation behavior with a wide passivation region. Electrochemical impedance spectroscopy (EIS) confirms that its passivation film is denser. This study shows that the addition of 20 wt% TiC optimizes the microstructural homogeneity and synergistically enhances the mechanical strengthening and electrochemical stability of the coating, providing a new strategy for the making of HEA-based layers in harsh wear-corrosion coupling environments.