Comparative investigation on thermally sprayed Al<sub>2</sub>O<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub>–13%(TiO<sub>2</sub>) and Al<sub>2</sub>O<sub>3</sub>–40%(TiO<sub>2</sub>) composite coatings from room to 400 °C temperature
Surface topography