文献类型：期刊文献

英文题名：Effects of rare earth oxides on wear resistance and corrosion resistance of 316L/TiC composite coating by laser cladding

作者：Jia, Donghe[1,2];Shi, Wenqing[2,3];Li, Kaiyue[3];Lu, Chao[2];An, Fenju[4];Lin, Liangjun[2];Guo, Fujian[2]

机构：[1]Guangdong Ocean Univ, Naval Architecture & Shipping Coll, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Sch Mat Sci & Engn, Yangjiang 529500, Peoples R China;[3]Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang 524088, Peoples R China;[4]Guangdong Ocean Univ, Sch Mech Engn, Zhanjiang 524088, Peoples R China

年份：2024

卷号：39

外文期刊名：MATERIALS TODAY COMMUNICATIONS

收录：SCI-EXPANDED(收录号：WOS:001285777900001)、、EI(收录号：20241815997902)、Scopus(收录号：2-s2.0-85191295496)、WOS

基金：The authors would like to thank the National Natural Science Foundation of China for funding the project [No. 62073089] as well as the Special Fund Project for Science and Technology Innovation Strategy of Guangdong Province Project in 2023 [SDZX2023004] for financial support of this paper.

语种：英文

外文关键词：Marine engineering; Laser cladding; Rare earth oxide wear resistance; Corrosion resistance

外文摘要：In this paper, 316L/TiC composite coatings with different kinds of REOs (Y2O3, La2O3, CeO2, PrO2, Nd2O3) at identical contents (2%) were prepared on S355 marine steel using the laser cladding technology. The surface morphology, phase composition, microhardness, coefficient of friction curve (COF), Tafel curve and electrochemical impedance spectroscopy (EIS) impedance of the test specimens were studied with such instruments as scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffractometer, Vickers microhardness tester, friction and wear tester, and multi-channel electrochemical workstation. The results show that the coating with REO added owns increased thickness and is uniform and dense without such defects as crack, and hole. The microstructure evolution mechanism of the coating from the bottom up is as follows: Cellular crystal, planar crystal -> columnar crystal -> equiaxed crystal. The phase composition of the coating with REO added remains unchanged, and is still Ni-Cr-Fe austenite phase and TiC phase. Further comparison shows that the coating with Nd2O3 added owns improved hardness, with a mean hardness of 3 times that of the substrate, and has a COF decreasing to 0.69, with wear loss becoming small. The coating with Nd2O3 added has the largest E-corr, the smallest I-corr, large |Z| value and phase angle, the greatest R-ct, and an n(ct) value of 1, indicating that the coating has dense passivation film and small corrosion tendency, with low corrosion rate. Therefore, this study provides reference experimental and theoretical bases for application of 316L/TiC composite coating with Nd2O3 added at 2% in surface strengthening and repair of steel for marine engineering equipment.