Hydroxyapatite film formed by particle beam irradiation

A hydroxyapatite (HA) film was fabricated on the titanium (Ti) plate by an aerosol deposition method using HA submicron-size particle beam. Technology of HA film formation on the Ti is important for biomaterial production. In this process, neither substrate nor HA particles were heated during deposition. Effect of varying the beam incident angle on the HA film formation was investigated. The incidence angle of the beam was varied from 0degrees to 60degrees with a period of 20degrees by rotation of substrate. Adhesion strength between the HA film and the Ti plate was increased as the incident angle increased although its thickness was decreased. In the films formed at incident angle of 60degrees, the adhesion strength was found to be higher than 30 MPa. Possible formation mechanisms of the HA film dependent on the incident angle was discussed. (C) 2003 Elsevier Ltd. All rights reserved.