LIANG Huayin , ZHU Qingxia , LI Jiake , LUO Minhua
(School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Key Laboratory of Advanced Ceramics of Jiangxi Province, Jingdezhen Jiangxi 333001, China)
Abstract: A hydroxyapatite/hydroxyfluorapatite (HA/FHA) double layer was coated on Al2O3 by a coating -sintering method.Carbonation of HA surface coating was carried out in wet CO2 atmosphere by solid-ion-exchange method. XRD, FTIR and SEM results showed that FHA intermediate layer was effective in suppressing the reaction between HA and Al2O3, the moisture in wetCO2 atmosphere was beneficial to the recovery of decomposition phases and carbonate ions could enter the surface structure to form the carbonated hydroxyapatite with prevailing A-type substitution. The obtained double -layered coating was porous and relatively rough, but was firmly adhered to the Al2O3 substrate.
Key words: solid-ion-exchange; carbonated hydroxyapatite; hydroxyfluorapatite; coating; substitution