电沉积制备羟基磷灰石-碳化硅复合涂层  

Preparation of HA-SiC Coating by Ultrasonic Electrodeposition Technique

作　　者：薛若茵[1] 李克智[1] 李贺军[1] 翟言强[1] 

机构地区：[1]西北工业大学超高温复合材料重点实验室碳/碳复合材料工程技术研究中心,陕西西安710072

出　　处：《电镀与精饰》2008年第9期4-8,共5页Plating & Finishing

基　　金：国家自然科学基金(50572091)

摘　　要：采用电沉积技术在碳/碳复合材料表面制备出羟基磷灰石-碳化硅复合涂层,通过扫描电镜、X-射线衍射仪、能谱仪、傅里叶红外光谱仪研究了电解液浓度与电流密度对复合涂层形貌与组成的影响,采用粘接拉伸法测试羟基磷灰石-碳化硅涂层、羟基磷灰石涂层与基体的结合强度。结果表明:随着电解液浓度的降低,涂层的组成由磷酸氢钙转变为羟基磷灰石,晶体从大尺寸的片状逐渐转变为纳米级球状。随着电流密度的升高,涂层的钙、磷摩尔比逐渐升高,晶体向疏松的针状转变。选取适当的工艺参数,羟基磷灰石-碳化硅与基体结合强度高于羟基磷灰石涂层。HA-SiC coatings on carbon/carbon compoistes, were successfully prepared by cathode electro- deposition technique. The composite coatings were characterized by using SEM, XRD, EDAX, and FTIR in order to investigate the effects, of the electrolyte concentration and current density on morphology, structure and composition of the coatings. The adhesion strength of HA-SiC coatings and pure HA coatings with the substrate was measured respectively. It is found that with the decrease of electrolyte concen-tration, the composition of coatings changes from calcium monohydrogen phosphate to hydroxylapatite, and the flake-like crystal changes to nanometer level particle. With the increase of the current density, the n（Ca）/n（P） of coating increases continuously and the shape of crystal change to needle-like. The adhesion strength of HA-SiC composite coatings is higher than that of HA coatings if choosing the proper processing parameter.

关 键 词：电沉积 碳/碳复合材料 电解液浓度 电流密度 

分 类 号：TB332[一般工业技术—材料科学与工程]