| 摘要: |
| 为了制备生物活性与表面质量良好HA/TC4钙磷复合涂层，对仿生矿化法制备钛基羟基磷灰石过程中，干燥和沉积次数对涂层表面的影响进行了研究。试验采用划分相同温度梯度的干燥方案，以24 h为总沉积时间，划分2次、3次干燥和沉积，利用X射线衍射（XRD）、扫描电镜（SEM）和能谱分析（EDS）对涂层形貌进行分析。结果表明： 3次干燥和沉积后，HA钙磷涂层表面裂纹尺寸控制在宽5～13 μm、长71～269 μm的范围内，同时涂层均匀性也得到改善；3次沉积后钙磷比为5.81，HA的结晶度得到提高。同时，利用薄膜测厚仪测得3次沉积后涂层的厚度从33 μm依次增加至39 μm，拉伸试验结果显示3次沉积后结合强度可以增加至12.41 MPa。采用仿生法、选择3次干燥和沉积后得到的涂层在表面形貌、涂层厚度、生物活性以及表面结合强度等方面均有利于临床应用。 |
| 关键词: 羟基磷灰石涂层 干燥 沉积 表面形貌 结合强度 |
| DOI：10.3969/j.issn.1007-9289.2014.05.016 |
| 分类号: |
| 基金项目: |
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| Impact of Drying and Sedimentation Techniques on the Properties of Hydroxyapatite Coating Based on Titanium |
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CAO Xin, DANG Xinan, YANG Lijun
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College of Mechanical and Electrical Engineering, Shanxi University of Science & Technology, Xi’an 710021
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| Abstract: |
| To prepare the calcium phosphate coatings of HA/TC4, which are great in both biological activity and surface quality, the influence of the times of drying and sedimentation on the coating surface was studied in the process of getting the Tibased HA by bionic mineralization method. A drying scheme with division of the same temperature gradient and total soaking time of 24 h was adopted for the test, in which two and three times of drying and sedimentation were divided, respectively, and scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) were adopted to analyze the coating morphology. The results show that three times of drying and sedimentation may control the size of cracks on HA calcium phosphate coating surface within 513 μm wide and 71269 μm long, and the coating uniformity is improved as well. The calciumphosphorus ratio is 5.81 and the crystallinity of HA increases after three times of sedimentation. Meanwhile, the coating thickness increases from 33 μm to 39 μm by film thickness meter. The tensile test results revealed that the bonding strength can increase up to 12.41 MPa. The coating after three times of drying and sedimentation by bionics mineralization methods is more available for clinical applications in morphology, coatingthickness, biological activity, and bonding strength. |
| Key words: hydroxyapatite coating drying sedimentation surface morphology bonding strength |
