Fabrication of multi-scale TiC and stainless steel composite coatings via circular oscillating laser towards superior wear and corrosion resistance of aluminum alloy  

作　　者：Fan Cao Hongzhi Cui Xiaojie Song Lin Gao Minglei Liu Qing Qiao Hongyuan Kong 

机构地区：[1]School of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China

出　　处：《Journal of Materials Science & Technology》2024年第10期191-204,共14页材料科学技术（英文版）

基　　金：National Natural Science Foundation of China(Nos.51971121 and 52002228);National Natural Science Foundation of China-Shandong Joint Fund for Marine Science Research Centers(CN)(No.U2106216);Qingdao Marine Science and Technology Innovation Project(No.22-3-3-hygg-27-hy).

摘　　要：The poor wear and corrosion resistance of aluminum alloys has led to the easy failure of surface perfor-mance.In this work,composite coatings of TiC/martensitic stainless steel(TiC/MSS)on aluminum alloy are fabricated by a novel approach of circular oscillating laser for enhanced surface performance of alu-minum alloys.The oscillation of laser leads to dense microstructure,and nano/micro scale TiC particles are formed simultaneously.The structure of coatings transforms from dendritic to ring-like with the ad-dition of TiC,and the hardness of the substrate is increased by 4.5-7.8 times.The main wear form of coatings is adhesive wear.The refinement of microstructure and formation of multi-scale TiC have given rise to an increase in the resistance of the coating to plastic deformation,which reduces the degree of adhesion and improves wear resistance.Besides,the barrier effect of TiC particles to the electrolyte solu-tion in the passive film gives rise to the drop in corrosion current density.The Cr-rich stacking faults can provide nucleation sites for the formation and growth of passive films with high continuity and stability,thereby improving the corrosion resistance of the coatings.The superior anticorrosion and wear resis-tance properties of the composite coatings in this work have emphasized the merits of oscillating laser in fabricating high-performance coatings and would enlighten the design of more advanced composite coatings.

关 键 词：Multi-scale TiC Coating Wear resistance Corrosion resistance Circular oscillating laser 

分 类 号：TG142.31[一般工业技术—材料科学与工程]