摘要
在含钙磷的水溶液和烟酸镀银液中 ,通过二次电沉积制备HA/Ag复合涂层 ,比较了不同工艺条件对涂层中Ag含量的影响 ,以及镀银对复合涂层结合强度、涂层组成和结构的影响。实验结果表明 ,随主盐浓度降低、电流密度减小、电沉积时间延长 ,涂层空隙减少 ,致密程度提高 ,涂层Ag含量相应减少 ;HA/Ag复合涂层的结合强度明显高于未镀银的HA涂层的结合强度 ;复合涂层经高温烧结后 ,Ag起催化剂作用 。
HA/Ag composite coatings were prepared by two step electrodeposition in aquatic electrolytes containing calcium and phosphate ions and subsequently electroplating of silver in nicotinic acid bath. The influence of different working process on the content of silver in the coating, the influences of silver plating on the bonding strength and composition and structure of coating were investigated. The results show that the content of silver in the coating reduces and the densification degree of the coatings increases with decrease of the salt concentration, current density and with prolonging of the deposition time. The bonding strength of HA/Ag composite coatings are much greater than that of pure HA coatings. HA in coatings could be decomposed when the sintering temperature above 750 ℃, the reaction is obviously catalyzed by presence of silver.
出处
《应用化学》
CAS
CSCD
北大核心
2003年第6期547-551,共5页
Chinese Journal of Applied Chemistry
基金
福建省自然科学基金重大项目 ( 2 0 0 0F0 0 3 )资助
关键词
羟基磷灰石
电沉积
银
hydroxyapatite(HA),electrodeposition,silver
