Mechanical Properties of Thermal Spray PEEK Coatings

The influences of process parameters on the microstructure of PEEK coatings deposited by flame spraying were analyzed by different physical and thermal methods, considering the density, the hardness and the Young's modulus. The cooling rate of the coating after spraying leads to large variations of the microstructure which evolves between the crystalline and amorphous states. Amorphous coatings exhibit less residual stress than semi-crystalline ones, which has an influence on the friction behavior.