摘要
本实验所用涂层为磷硅酸盐玻璃系统,涂层以Sol-gel工艺制得。对该工艺制得的涂层于不同温度(700℃、800℃、900℃)下烧成后的各项性能进行比较,对涂层断面进行分析,以确定不同烧成温度下涂层-基体的界面状态。结果表明800℃烧成的涂层具有最好的综合性能:晶型简单;表面虽有裂纹存在,但基体并未裸露,实现了有效涂层的目的;层间扩散明显,涂层.基体界面处有良好过渡;与基体的结合强度高(2层为10.50MPa,4层为7.11MPa);在模拟体液(SBF)中浸泡30天后表面有大量羟基磷灰石(HA)生成,表明其具有良好的生物活性。
In previous work, a bioglass (BG) coating which belongs to phosphoric silicate was deposited by sol-gel technology. Hereon the samples sintered at different temperature(700% ,800℃ and 900℃ ) were characterized respectively. Noted that we studied the samples' cross sections to determine the structure and composition of the coating-substrate interface. The result suggests that the coatings sintered at 800℃ present optimal integrated properties:they have clear crystallinity; they cover the substrate effectively despite the existing of the cracks ; there are obvious component gradient at the coatings-substrate interface indicating the elements diffused between layers during the sintering; the bonding strength is high( 10. 50MPa when deposited twice,7, llMPa when deposited four times) ; abundant HA aggregate on the surfaces of the samples after immersed in SBF for 30d, from this we can roughly predict that they have excellent bioactivity.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2005年第F05期328-331,共4页
Materials Reports