碳酸根和氟复合替代磷灰石梯度涂层的替代离子分布及其控制研究

项目名称： 碳酸根和氟复合替代磷灰石梯度涂层的替代离子分布及其控制研究

项目编号： No.51462014

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 朱庆霞

作者单位： 景德镇陶瓷大学

项目金额： 47万元

中文摘要： 在钛合金表面涂覆生物活性磷灰石(HA)涂层通常需要通过HA与外加物复合来满足植入材料在结合强度和生物活性方面的要求，但很难避免外加物对涂层稳定性的破坏。本项目采用电泳沉积法制备碳酸根和氟复合替代磷灰石梯度涂层，仅通过涂层中碳酸根和氟替代量和替代类型的梯度变化调控涂层性能。本课题阐明碳酸根和氟复合替代机理；揭示复合替代对磷灰石热膨胀系数、稳定性和生物学性能的影响规律；进行梯度涂层替代离子分布设计，认识复合替代量和替代类型在热处理过程的变化规律，优化电泳沉积涂层制备工艺。通过本项目的研究，将磷灰石替代研究范围从常见的单一替代拓宽到复合替代，丰富了磷灰石的替代理论，具有重大的科学意义；而且设计了通过磷灰石自身替代改性进行性能调控的梯度涂层结构，发展了碳酸根和氟复合替代磷灰石梯度涂层的关键制备技术，具有很高的潜在应用价值。

中文关键词： 磷灰石梯度涂层；电泳沉积；碳酸根和氟复合替代；结合强度；生物活性

英文摘要： In order to meet the both bond strength and bioactivity requirements of implants, hydroxyapatite (HA) is usually mixed with the additives as composite coating on the titanium matrix. However, it is difficult to avoid the destructive effect of the additives on the coating stability. The apatite gradient coating co-substituted by carbonate and fluoride ions is prepared by the electrophoretic deposition method and the coating performance is regulated only by the gradient changes of substitution ions content and type. Co-substitution mechanism of carbonate and fluoride ions is clarified; the influences rules of co-substitution on the thermal expansion coefficient, the stability and biological properties are revealed; gradient distribution of substitution ions in coating is designed; the changes of co-substitution amount and type are controlled during the heat treatment process; preparation processes of electrophoretic deposition coating are optimized. The research broadens the scope from the single substitution to compound substitution and enriches the apatite substitution theory; Moreover, the research devises gradient coating structure to regulate the performances by substitute modification of apatite itself and develops the key preparation technology of apatite gradient coating co-substituted by carbonate and fluoride ions. In general, the research has both great scientific significance and potential application value.

英文关键词： apatite gradient coating;electrophoretic deposition;co-substitution of carbonate and fluoride ions;bonding strength;bioactivity