超音速等离子喷涂Al_2O_3-3%TiO_2涂层的耐磨性能研究  

Wear-resisting property of Al_2O_3-3%TiO_2 coating prepared by supersonic plasma spraying technology

作　　者：毛杰[1] 刘敏[1] 邓畅光[1] 欧献[1] 邓春明[1] 邝子奇[1] 

机构地区：[1]广州有色金属研究院,广东广州510651

出　　处：《兵器材料科学与工程》2015年第6期5-8,共4页Ordnance Material Science and Engineering

基　　金：国际科技合作项目(2011DFB50030);广东省引进创新科研团队计划(2011C007)

摘　　要：采用超音速等离子喷涂技术制备Al2O3-3%Ti O2涂层,通过单变量实验研究喷涂电流、喷距等工艺参数和不同磨粒磨损条件对涂层磨损质量损失的影响,并与大气等离子喷涂工艺进行对比。结果表明：超音速等离子喷涂制备的Al2O3-3%Ti O2涂层致密,孔隙率小,微裂纹很少且短;涂层组织随喷涂电流的增加更加均匀,表现出磨损质量损失减小,即相对较大电流制备的涂层表现出更好的耐磨性;喷距对涂层磨损率影响不明显;摩擦正压力和磨粒粒度都影响涂层的耐磨性能,粒度影响更显著。相比大气等离子喷涂,超音速等离子喷涂AT3涂层的显微硬度提高50%,在相同工况磨损条件下,耐磨性能为大气等离子喷涂的2~3倍。Al2O3-3%Ti O2（AT3）coatings were prepared by supersonic atmospheric plasma spraying（SAPS）techbology. Single variable method was used to study the influence of spraying current,spray distance and different abrasion condition on mass loss of the coatings. It was also discussed by comparing with atmospheric plasma spraying（APS）. The results indicate that Al2O3-3%Ti O2 coatings prepared by SAPS have dense microstructure,low porosity,a few short microcracks and higher microhardness,and the mass loss decreases with the increase of spraying current,that is,the coatings prepared by a relatively large current exhibit better wear resistance. Spray diatance has no obvious influence on the coating abrasion rate. The wear-resisting property is affected by many factors,such as friction pressure and abrasive particle size,and the latter effect is more apparent. Compared with APS,the microhardness of AT3 coatings prepared by SAPS increases by 50%,and the wearing lifetime under the same friction condition is 2-3 times.

关 键 词：超音速等离子喷涂 大气等离子喷涂 Al2O3-3%TiO2涂层 耐磨性能 

分 类 号：TG174.453[金属学及工艺—金属表面处理]