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Investigation of Hydroxyapatite Spraying on AZ31 Magnesium Alloy for Biomaterial Application

机译：羟基磷灰石喷涂对AZ31镁合金进行生物材料应用

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Known as having poor corrosion resistance for general engineering application, recently Magnesium (Mg) alloys have attracted great interest among researchers to be used as biodegradable osteo-implants. Ideally, this implant material should corrode at a slow enough rates to maintain mechanical integrity until the bone heals. A controlled corrosion rate is also needed in order to avoid the build-up of corrosion products that are harmful to cell growth. The use of a hydroxyapatite (HA) coating is appealing since it will provide a barrier to slow the corrosion and because HA is beneficial for stimulating bone growth The challenge is to control the coating microstructure so that the desired corrosion profile is obtained. Plasma spray technology with several spraying parameter settings has been chosen to investigate the properties of HA coatings on Mg. Corrosion testing in a Simulated Body Fluid (SBF) testing solution with potentiodynamic polarization has been conducted on the deposited coatings. As-sprayed and corrosion tested HA-coated Mg have been characterised by Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR).
机译：被称为通用工程应用耐腐蚀性差，最近的镁（Mg）合金吸引了迄今为止使用作为可生物降解的骨液植入物的研究人员的兴趣。理想情况下，这种植入物材料应以足够慢的速率腐蚀以保持机械完整性，直到骨骼愈合。还需要控制的腐蚀速率，以避免对细胞生长有害的腐蚀产物的积累。使用羟基磷灰石（HA）涂层是吸引人的，因为它将提供缓慢腐蚀的屏障，因为HA有益于刺激骨骼生长，挑战是控制涂层微观结构，从而获得所需的腐蚀曲线。已选择具有几种喷涂参数设置的等离子体喷涂技术，以研究HA涂层对MG的性质。已经在沉积的涂层上进行了具有电位变性极化的模拟体液（SBF）测试溶液中的腐蚀性测试。通过扫描电子显微镜（SEM），X射线衍射（XRD）和傅里叶变换红外光谱（FTIR），已经表征了涂抹和腐蚀的HA涂覆的Mg。

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