文献类型：期刊文献

英文题名：Synergistic effect of YSZ on wear and corrosion resistance of Laser cladded Ni-based/WC composite coating: Microstructure evolution and underlying mechanisms

作者：Liang, Feilong[1,2];Shi, Wenqing[3];Liu, Yanguo[3];Teng, Yuan[3];Chen, Dongdong[3];Yin, Zuozhu[4];Xue, Mingshan[3]

机构：[1]Guangdong Ocean Univ, Naval Architecture & Shipping Coll, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Guangdong Prov Key Lab Intelligent Equipment South, Zhanjiang 524088, Peoples R China;[3]Guangdong Ocean Univ, Sch Mat Sci & Engn, Yangjiang 529500, Peoples R China;[4]Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Peoples R China

年份：2027

卷号：225

外文期刊名：TRIBOLOGY INTERNATIONAL

收录：SCI-EXPANDED(收录号：WOS:001808883900001)、、WOS

基金：This work was funded by the National Natural Science Foundation of China (12264030), and supported by program for scientific research start-upfunds of Guangdong Ocean University (360302032505).

语种：英文

外文关键词：Laser cladding; Ni-based composite coating; Wear resistance; Corrosion resistance; Synergistic mechanism

外文摘要：To extend the service life of critical marine components under harsh environmental conditions, Ni-based/WC composite coatings with varying contents of yttria-stabilized zirconia (YSZ) were fabricated on 316 L stainless steel substrates via laser cladding. The influence of YSZ on the microstructure, phase composition, microhardness, wear resistance, and electrochemical corrosion behavior of the coatings was systematically investigated, with a particular focus on the regulation mechanism of YSZ content on the wear and corrosion properties. The results demonstrate that an appropriate amount of YSZ (2 wt%) significantly increases the nucleation rate of the molten pool, refines the dendritic and eutectic structures, promotes uniform distribution of carbide hard phases, and suppresses the formation of brittle Ni3Si phase. Furthermore, YSZ effectively inhibits crack generation through stress-induced phase transformation toughening, facilitates the solid solution of Cr into the y-Ni matrix, enhances solid-solution strengthening, improves passive film stability, and reduces galvanic corrosion tendency between hard phases and the matrix. Compared with the YSZ-free coating, the wear volume decreases from 14.943 & times; 10-6 mm3 center dot N-1 center dot m-1 to 9.417 & times; 10-6 mm3 center dot N-1 center dot m-1 (a reduction of 37%), the corrosion current density drops from 10.586 & micro;A center dot cm-2 to 1.497 & micro;A center dot cm-2, and the donor density of the passive film remarkably decreases from 2.57 & times; 1023cm-3to 7.58 & times; 1021 cm-3(only 2.94% of that of the YSZ-free coating). This study reveals the multiple synergistic mechanisms of YSZ in Ni-based/WC coatings, i.e., microstructure refinement, solid-solution strengthening, passive film stabilization, and galvanic corrosion suppression, provides a new materials design strategy for surface strengthening of key marine components under extreme operating conditions.