【作者】 寇斌达；

【导师】 王从曾；

【作者基本信息】 北京工业大学 ， 材料学， 2003， 硕士

【摘要】 本论文把微弧氧化技术用于在钛表面制备类羟基磷灰石（HA）的含磷、钙活性涂层。采用自制的微弧氧化简易装置，在钛表面制备了含磷、钙的涂层。 对实验制得的涂层的分析表明：采用微弧氧化技术、通过微弧氧化电弧的高温烧结作用可以在钛基体表面制备含磷、钙的活性涂层。涂层是一种多孔状、与基体结合牢固、具有陶瓷特性的混合物，其性能与微弧氧化处理时电参量的选择以及电解液的温度和配方有关。在目前实验条件下，电解液中的磷酸盐可选择磷酸类铵盐，如磷酸二氢铵（（NH₄）H₂PO₄）等；钙盐为不溶性的磷酸钙（Ca₃（PO₄）₂）、碳酸钙（CaCO₃）或溶解度很小的醋酸钙（（CH₃COO）₂Ca·H₂O）等，其中使用醋酸钙时涂层的含钙量最高。 本论文系统地研究了微弧氧化的各工艺参数对涂层的影响，发现电解液配方是影响涂层组织和成分的主要因素；微弧氧化的电流是影响涂层性能的主要因素。在分析大量实验结果的基础上，本文给出了在目前实验条件下的最佳工艺参数。 通过对涂层进行SEM和XRD分析可知，采用微弧氧化技术在钛表面制备的含磷、钙活性涂层中的磷、钙化合物是可以通过现有手段进行活化处理的。 本文对采用微弧氧化技术在钛表面制备含磷、钙活性涂层的机理进行了初步的探讨，认为电泳理论可以解释电解液中含钙粒子向阳极运动的原因；而电弧的局部高温使阳极上发生了烧结的过程，从而在钛表面形成磷、钙涂层。更多还原

【Abstract】 In the paper, microarc oxidation technique was adopted to fabricate calcium phosphate compound of hydroxyapatite analogue coating on titanium substrate. With the facility of microarc oxidation made by ourselves, the calcium phosphate compound was coated on titanium substrate. The analyzing to the coating turn out from the experimentation indicated that adopting microarc oxidation technique and by the sintering from the arc the calcium phosphate compound was coated on titanium substrate. The fabricated coating was the ceramic intermixture which was porous and firmly combined with the titanium substrate. The property of the coating was affected by the electroparameter and the direction of the electrolyte. Under optimal processing condition, phosphatic ammonia salt, for example, (NH4)H2PO4 etc. act as the phosphate and Ca3(PO4), CaCO3, (CH3COOH)Ca-H2O etc. act as calc-salt of the electrolyte. The calcium content of the coating was more when the (CH3COOH) Ca’H20 was elected than others did .The processing parameters , which affected the coating, was studied systematically. It was found the ingredient of the coating was mainly determined by the’direction of the electrolyte and so did the property of the coating by the electric current of microarc oxidation. The optimized parameters under optimal processing condition was work out in the paper after lots of experiments .Analyzing the coating with SEM and XRD, it was found the calcium phosphate compound in the coating fabricated through microarc oxidation can be biomedically activated.The principium of microarc oxidation technique adopted to fabricate biomedical calcium phosphate compound coating on titanium substrate was primarily explored in the paper, the conclusion was drown, that is, the reason that the corpuscule which contained calcium moving to anode can be interpreted by the theory of electrochemical deposition. The corpuscule was sintered with the titaniumsubstrate for the high temperature of the arc on the anode.更多还原