Comparative Solid Particle Erosion Characterization of Conventional and Nanostructured Al2O3-13wt.％TiO2 Ceramic Coatings Fabricated by Plasma Spraying Process
In this work,conventional and nanostructured Al2O313wt.％TiO2 coatings were deposited by the plasma spraying technique.The microstructures of the two types of coatings were analyzed,and the solid particle erosion behaviors of the two coatings were comparatively researched in an erosion tester. Meanwhile,the erosion failure mechanisms of the coatings were discussed.The results show that the traditional coating has laminated structure and some pores.However,the nanostructured coating possesses a denser structure and not obviously lamellar-like structure,and exhibits a bimodal microstructure consisted of fully melted regions and partially melted regions.Owing to the compact microstructure and remained nano-particles,the nanostructured coating had a better erosion wear resistance than the conventional coating.Eroded morphology analysis indicates the main erosion mass loss of the coatings is attributed to lamellar spalling of the sprayed splats and fracture of brittle ceramic particles.In addition,the nanostructued coating has some impact craters and plough marks.In terms of the erosion mechanism,the conventional ceramic coating is dominated by brittle erosion,while the nanostructured ceramic coating is dominated by brittle erosion as well as ductile erosion to some extent.
Plasma spraying Nanostructured coating Al2O3-13wt. TiO2 Solid particle erosion
Wang Dongsheng Tian Zongjun Wang Songlin Shen Lida
College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics, College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics, Department of Mechanical Engineering,Tongling University,Tongling,China,244000 College of Mechanical and ElectricalEngineering,Nanjing University of Aeronautics and Astronautics,N
国际会议
2012 2nd International Conference on Advanced Material Research(2012 第二届先进材料研究国际会议 ICAMR2012)
成都
英文
359-363
2012-01-07（万方平台首次上网日期，不代表论文的发表时间）