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Effect of La2O3 addition on wear properties of Ni60a/SiC coating using laser-cladding

文献类型： 外文期刊

作者： Shi, Yameng 1 ; Li, Jingbin 1 ; Zhang, Jie 3 ; Wen, Baoqin 1 ; Li, Liqiao 1 ; Wang, Xianfei 1 ; Ren, Sixue 1 ;

作者机构： 1.Shihezi Univ, Sch Mech & Elect Engn, Shihezi 832000, Xinjiang, Peoples R China

2.Key Lab Modern Agr Machinery Corps, Shihezi 832000, Peoples R China

3.Xinjiang Acad Agr Sci, Inst Agr Mechanizat, Urumqi 830000, Peoples R China

关键词： Laser-cladding; Phase composition; Rare earth element; Friction and wear

期刊名称：OPTICS AND LASER TECHNOLOGY （ 影响因子：4.939； 五年影响因子：4.411 ）

ISSN： 0030-3992

年卷期： 2022 年 148 卷

页码：

收录情况： SCI

摘要： This study investigates the influence of rare-earth La2O3 content on the wear resistance of a laser clad coating. Different contents of nano-rare-earth La2O3 were added to a Ni60a/SiC composite powder to analyse the phase composition, element distribution and friction and wear characteristics of the coating to determine the optimum amount of rare-earth La2O3 to be added. The results showed that the coating with 2 wt% La2O3 added based on the Ni60a/SiC composite powder exhibited the best comprehensive properties. X-ray diffraction and X-ray photoelectron spectroscopy analyses showed that new phases were formed in the coatings with 2 wt% La2O3 mainly consisted of hard phases such as Cr7C3 and CrC. Scanning electron microscopy revealed that the coating grain with 2 wt% La2O3 was refined, the density increased and the distribution of coating elements was more uniform. The wear surface coating was slightly peeled off, and a friction coefficient of 0.63 and a wear depth of 15.79 mu m were achieved, which were 3% and 86% lower than those of the 65Mn matrix, respectively. The wear amount was 0.002 g. The wear surface experienced an oxidation reaction.

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