Degeneration of thermal insulation property for Fe-based amorphous coating during long-term heat exposure

Mechanical and Physical Properties of Al2O3-TiAl deposited by Thermal Spraying Method

“…Figure (3) shows the relationship between the reinforcing material (TiAlwt.%) and the adhesion strength before and after the thermal sintering process at a temperature of (1000°C) for a 1.5hour. This figure indicates that the adhesion strength increases with the increase of the reinforcing material that the adhesion strength increases with the increase in the reinforcing material, so the value of the adhesion strength was for 5%wt.TiAl it is 8MPa before sintering and 11MPa after sintering, while the value of adhesion strength at 25wt.%TiAl was 22 MPa before sintering, and it was 29 MPa after sintering, adhesion strength can be defined as the force equivalent to the force needed to remove a unit area of the coating layer from the cermet base If the sintering process clearly contributes to increasing the adhesion strength, as the sintering process leads to an increase in the kinetic energy of the material, and thus the vibrations of the coating particles increase, which makes the atoms of the coating material approach each other and thus they are more sticky and cohesive [30,31].…”