Abstract:
The microstructure and indentation load-displacement behavior of sprayed Al2O3/3%TiO2 coating were investigated.In comparison with the surface of the coating,the cross-section of the coating had more pores with bigger size and more unhomogeneous distribution.The anisotropic microstructure of the coating led to apparently anisotropic mechanical properites such as plasticity,elasticity,hardness and Youngs modulus.However,the surface of the coating had better ability to resist applied load and better elastic recovery after unloading than the cross-section.The hardness and Youngs modulus of the surface of the coating were 10.3 GPa and 170.7 GPa,respectively.While those of the cross-section of the coating were 2.9 GPa and 234.5 GPa.