Al 2 O 3 + TiO 2 Thin Film made by Electrostatic Spray Deposition

Abstract

In this work electrostatic spray deposition process was used to deposit thin Al 2 O 3 + TiO 2 ceramic thin film on X10CrAlSi18 steel from colloidal suspension of TiO 2 powder in Al 2 O 3 precursor solution. The precursor was 3% solution of Al 2 (NO 3 ) 3 in ethanol. An influence of the thermal treatment after film deposition on protective properties against high temperatures and film endurance were investigated. The resistance against thermal cycles and dynamic impacts were tested. Performed investigations showed that the best protective properties had the Al 2 O 3 + TiO 2 film sintered at 1000°C.