Effect of Al_2O_3on Structure and Wearability of Composite Coating  

作　　者：DING Hong-yan ZHANG Yue 

机构地区：[1]Nanjing University of Aeronautics and Astronautics [2]Huaiyin Institute of Technology

出　　处：《Journal of Iron and Steel Research International》2004年第3期59-62,共4页

基　　金：Item Sponsored by Provincial Natural Science Foundation of Jiangsu of China(BK2000012)

摘　　要：The composite coating was prepared by thermal spray welding after making composite powder,which is composed of Ni-based self-melted alloy and AlOceramic powder including nano,sub-micron and micron powders.The influences of contents and sizes of AlOon the structure and wearability were investigated.The results show that the wear resistance of the coating would be increased greatly by adding AlO,but the spray weldability decreases with increasing AlOcontent.So there is an optimal content of AlOpowder.The composite coating with AlOnano or sub-micron powder of 0.5% has the best abrasive resistance,while the optimal content of AlOmicron powder is 1 %.The composite coating was prepared by thermal spray welding after making composite powder,which is composed of Ni-based self-melted alloy and Al_2O_3 ceramic powder including nano,sub-micron and micron powders.The influences of contents and sizes of Al_2O_3 on the structure and wearability were investigated.The results show that the wear resistance of the coating would be increased greatly by adding Al_2O_3,but the spray weldability decreases with increasing Al_2O_3 content.So there is an optimal content of Al_2O_3 powder.The composite coating with Al_2O_3 nano or sub-micron powder of 0.5% has the best abrasive resistance,while the optimal content of Al_2O_3 micron powder is 1 %.

关 键 词：ceramic powder thermal spray welding composite coating AL2O3 NANO-POWDER 

分 类 号：TG174.4[金属学及工艺—金属表面处理]