Mechanical properties of TiO2-hydroxyapatite nanostructured coatings on Ti-6Al-4V substrates by APS method
Mechanical properties of TiO2-hydroxyapatite nanostructured coatings on Ti-6Al-4V substrates by APS method
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DOI：
10.1007/s12613-013-0742-3
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
M. Zakeri;E. Hasani;M. Tamizifar
中科院分区：
文献类型：
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作者：
M. Zakeri;E. Hasani;M. Tamizifar
采用常压等离子喷涂法制备了TiO 2-羟基磷灰石（HA）纳米涂层。研究了原料粉组成和粒度对力学性能的影响。利用X射线衍射仪和扫描电子显微镜（SEM）对复合材料的微观结构和形貌进行了表征。结果表明，HA含量为10%时涂层的力学性能最好。基于Rietveld细化方法，在高能球磨20 h后，原始粉末的平均晶粒尺寸（212 nm）大幅减小至66.4 nm。尽管晶粒生长，沉积的涂层仍保持其平均晶粒尺寸为112 nm的纳米结构。SEM照片显示，HA含量越高，涂层的孔隙率越低。光学显微镜图像显示，所有涂层的厚度均匀。
TiO2-hydroxyapatite (HA) nanostructured coatings were produced by atmospheric plasma spray method. The effects of starting powder composition and grain size on their mechanical properties were investigated. The microstructure and morphology were characterized by X-ray diffraction and scanning electron microscopy (SEM). It is found that the coating with 10% HA has the best mechanical properties. Based on Rietveld refinement method, the mean grain size of the as-received powder (212 nm) extensively decreases to 66.4 nm after 20 h of high-energy ball milling. In spite of grain growth, the deposited coatings maintain their nanostructures with the mean grain size of 112 nm. SEM images show that there is a lower porosity in the coating with a higher HA content. Optical microscopy images show that uniform thickness is obtained for all the coatings.