Hot corrosion, high temperature oxidation and thermal shock behavior of nanoagglomerated YSZ-Alumina composite coatings produced by plasma spray method

► YSZ-5, 10 and 15 wt.% Al2O3 composite nanopowders have been sprayed by atmospheric plasma spray. ► Hot corrosion resistance of YSZ-Alumina coatings is higher than YSZ coatings. ► For YSZ-15 wt.% Alumina there is more splat formation in bimodal structure which results in a higher tensile strength. ► The results of thermal shock test of coatings show the same trend observed in the tensile strength test results. ► High temperature oxidation of YSZ-Alumina coatings is higher than YSZ coatings.