碳/碳复合材料表面的含氟磷灰石生物活性涂层  

A fluorine-containing hydroxyapatite bioactive coating on the surface of C/C composites

作　　者：翟言强[1] 李克智[1] 李贺军[1] 刘皓[1] 

机构地区：[1]西北工业大学材料学院,西安710072

出　　处：《材料研究学报》2007年第6期570-576,共7页Chinese Journal of Materials Research

基　　金：国家自然科学基金50572091;西北工业大学创新基金资助项目~~

摘　　要：用超声电沉积与离子交换相结合的方法在碳/碳复合材料表面制备含氟磷灰石(FHA)生物活性涂层,研究了离子交换时间和氟化钠浓度对含氟磷灰石(FHA)生物活性涂层的形貌、结构和组成的影响,结果表明:离子交换后的涂层是羟基磷灰石(HA)和含氟磷灰石(FHA)混合物,离子交换前后其表面形貌均呈片状晶体,随着离子交换时间的延长或氟化钠浓度的增加,HA含量降低,FHA含量升高,涂层的晶粒尺寸和致密性均发生变化,离子交换后其涂层与基体的结合强度略有增强,其原因是FHA的热膨胀系数与碳/碳复合材料基体更为匹配,涂层的残余应力减小。A fluorine-containing hydroxyapatite （FHA） coating was prepared on the surface of carbon/carbon composites（C/C） using the two-step method of sonoelectrodeposition and ion exchange. The effects of ion exchange time and concentration of NaF on the morphology, microstructure and composition of the as-received coating were investigated. The results show that after the ion exchange, the coating is composed of hydroxyapatite （HA） and F-rich apatite （FHA）. The coating possesses a similar structure of plate-like crystal before and after ion exchange. With increasing of ion exchange time and concentration of NaF, the content of HA in the coating decreases while F-rich apatite （FHA） increases, and the size of the crystals changes. The bonding strength between the coating and C/C matrix increases slightly after ion exchange, which can be attributed to the good matching of the thermal expansion coefficient between FHA and C/C.

关 键 词：材料表面与界面 碳/碳复合材料 声电沉积 离子交换 含氟磷灰石 

分 类 号：TB332[一般工业技术—材料科学与工程]