炭/炭复合材料声电沉积钙磷生物活性涂层的生长机理  

Growth Mechanism of the Calcium Phosphate Coatings on C/C Composites by Sonoelectrodeposition Technique

作　　者：翟言强[1] 李克智[1] 李贺军[1] 刘皓[1] 赵建国[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《稀有金属材料与工程》2006年第7期1096-1100,共5页Rare Metal Materials and Engineering

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

摘　　要：通过声电沉积在炭/炭复合材料表面制备钙磷生物活性涂层,采用SEM(带EDAX),XDR,FTIR研究电沉积时间对钙磷生物活性涂层的形貌、结构和组成的影响。实验结果表明:沉积初始先在炭/炭表面形成无定形层,片状磷酸氢钙(DCPD)在其表面生长,随着电沉积时间的延长,逐渐向针状的羟基磷灰石Ca10(PO4)6(OH)2(HA)转变,涂层厚度和n(Ca)/n(P)不断增加,涂层的结晶度和电解液的pH值下降。涂层为缺钙磷灰石。同时探讨了在炭/炭复合材料表面钙磷生物活性涂层的生长机理。Bioactive calcium phosphate coatings on carbon/carbon composites were prepared by a cathode sonoelectrodepostion technique. The effects of electrodeposition time on the morphology, structure and composition of the coatings on carbon/carbon composites were investigated by SEM, EDAX, FTIR and XRD. The experimental results show that the plate-like crystals formed in initial stages of electrodeposition were identified to be CaHPO4.2H2O（DCPD）. With the electrodeposition time elapsing, the formed needle-like precipitates were identified to be Ca10（PO4）6（OH）2（HA）, the coating thickness and the n（Ca）/n（P） ratio increased continuously. The degree of crystallization of the coatings and the pH values of electrolyte decreased with the electrodeposition time increasing. The coatings were calcium-deficient apatite. In addition, the growth mechanism of coatings on C/C composites was also discussed.

关 键 词：声电沉积 炭/炭复合材料 磷酸钙 生物活性涂层 

分 类 号：TB332[一般工业技术—材料科学与工程]