| 钛表面生物活性榍石/氧化钛复合涂层的结构和磷灰石形成机理 |
| Bioactive Sphene/Titanium Oxide Composite Coatings on Titanium：Structure and Apatite Formation Mechanism |
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| 摘要: 采用微弧氧化和热处理复合技术，在钛表面制备了具有双层结构的榍石/氧化钛复合涂层。榍石/氧化钛复合涂层的外层是由微弧氧化涂层经热处理后晶化生成；而内层是由钛基底的氧化生成，并且氧化钛表现出不同的Ti，O原子比。由于钛基底的氧化，孔径在50~500 nm的微孔呈层状结构分布在涂层内层。与微弧氧化涂层相比，该复合涂层具有很好的磷灰石诱导能力，这是由于榍石沿着特定晶面和晶向与羟基磷灰石表现出良好的晶体学匹配关系，从而为磷灰石的成核和取向沉积过程提供良好的位点。 |
| 关键词: 钛 微弧氧化 热处理 榍石 磷灰石 晶体学匹配 |
| 基金项目: 国家基础科学研究项目（No.2012CB933900），国家自然科学基金（No.51002039和51021002），高等学校博士学科点专项科研基金（No.20102302120003），中央高校基本科研业务费专项资金（No.HIT.NSRIF.2014002）资助项目。 |
| Abstract: Sphene/titanium oxide composite coatings with two-layer structure were prepared by a hybrid technique of microarc oxidation (MAO) and heat treatment on titanium. The skin layer of the sphene/titanium oxide composite coatings is formed by the crystallization of the initial MAO coating after heat treatment; while the inner layer is from the oxidation of Ti substrate, containing various titanium oxides with different Ti/O atomic ratios. In addition, the micropores in size of 50~500 nm with a layer-like distribution are formed in the inner layer due to the oxidation of Ti substrate. The composite coating has good apatite formation ability as compared to the MAO coating, since the sphene in the composite coating has good crystallographic matching relations with hydroxyapatite (HA) on the specific crystal directions and planes, probably providing good sites for apatite nucleation by the epitaxial deposition process. |
| Keywords: titanium microarc oxidation heat treatment sphene apatite crystallographic matching |
| 投稿时间：2013-12-17 修订日期：2014-02-17 |
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| 白轶昕,焦晓辉,魏大庆,周玉.钛表面生物活性榍石/氧化钛复合涂层的结构和磷灰石形成机理[J].无机化学学报,2014,30(7):1701-1711. |
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