Microstructure and properties of TiB_(2)-Ni coatings with different binder phase contents deposited by HVOF spray process  

作　　者：Xiao Chen Hong-Tao Wang Gang-Chang Ji Xiao-Bo Bai Wei Fu 

机构地区：[1]School of Mechanical and Materials Engineering,Jiujiang University,Jiujiang 332005,China

出　　处：《Rare Metals》2022年第4期1385-1393,共9页稀有金属（英文版）

基　　金：the National Natural Science Foundation of China(No.51001056);the Natural Science Foundation of Jiangxi Province(No.20132BAB216014);the Science and Technology Project of Jiangxi Educational Bureau(Nos.GJJ12610,GJJ13721,and GJJ12622)。

摘　　要：TiB_(2)–Ni coatings with different binder phase contents were sprayed on Q235 substrate by a high-velocity oxygen-fuel(HVOF)method using ball-milled powders.The microstructure,phase compositions,as well as thermal shock behavior,abrasive wear,and corrosion resistance to molten Al-12.07 wt%Si alloy performances of as-sprayed coatings were investigated.The results show that the three TiB_(2)–Ni coatings structure is dense with low porosity,and the main phase compositions of the coatings are TiB_(2) and Ni similar to those of original powder.The coatings that have superior performance of thermal shock resistance have good bond to the substrate with no change in thick-ness and microstructure of coatings.Meanwhile,the coat-ings also have good durability in the molten Al-12.07 wt%Si after 60-h immersion test.And the mass loss of Q235 steel is five times as much as that of TiB_(2)–50Ni coatings after abrasive wear test.

关 键 词：HVOF TiB_(2)-Ni Microstructure Abrasive wear Corrosion 

分 类 号：TG174.4[金属学及工艺—金属表面处理]