Effect on microstructure of TiO2 rate in Al2O3-TiO2 composite coating produced using plasma spray method. Islak, S; Buytoz, S; Ersoz, E; Orhan, N; Stokes, J; Hashmi, M.S; Somunkiran, I; Tosun, N. Optoelectronics and Advanced Materials, Rapid Communications 2012