Effect of Spray Power on Characteristics of Vacuum Plasma Sprayed Hydroxyapatite Coatings

Hydroxyapatite coatings were made under different spray power using a Vacuum Plasma Spray System. The effects of spray power on characteristics of hydroxyapatite coatings were investigated.In the experiment, X Ray Diffeactometer and Scanning Electron Microscopy were used to detect phase compositions and microstructures of as-received coatings. The results obtained indicated that, plasma spray power greatly effected the characteristics of the as-received coatings. With the increase of spray power, hydroxyapatite content of as-received coatings decreased, showing the amorphorization of coatings was prompted. Also, with the increase of spray power, the melt of hydroxyapatite was improved, the coatings with good microstructures were obtained.