首页> 外文期刊>Revista de metalurgia >Dise?o de recubrimientos multicapa barrera-biomimético base TEOS-GPTMS sobre la aleación de magnesio Elektron 21 de potencial aplicación en la fabricación de implantes ortopédicos
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Dise?o de recubrimientos multicapa barrera-biomimético base TEOS-GPTMS sobre la aleación de magnesio Elektron 21 de potencial aplicación en la fabricación de implantes ortopédicos

机译:基于TEOS-GPTMS的Elektron 21镁合金多层仿生生物仿生涂层设计在骨科植入物中的潜在应用

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In the present work, barrier-biomimetic multilayer coatings were synthesized via sol-gel on the commercial Elektron 21 magnesium alloy, with potential interest in the fabrication of orthopaedic temporal implants. Sol-gel synthesis was carried out from a mixture of inorganic and organic precursors, TEOS and GPTMS. Two different sols were prepared: sols employed for the design of barrier coatings (named GT) which function were to protect the magnesium alloy against corrosion; and sols containing additionally calcium nitrate (named GTCa), in different concentrations, for the design of the biomimetic coatings, which were deposited over the GT coating. The results confirmed that the GT coatings enhanced the corrosion resistance of the base alloy in Hank solution, reducing the corrosion current density in about two orders of magnitude. Further, the presence of Ca(II) in GTCa coatings promoted the formation of discontinuous film of hydroxyapatite on the surface, indicating that those coatings exhibit bioactive properties.
机译:在目前的工作中,在商业的Elektron 21镁合金上通过溶胶-凝胶合成了屏障仿生多层涂层,这对骨科颞骨植入物具有潜在的兴趣。溶胶-凝胶合成是由无机和有机前体,TEOS和GPTMS的混合物进行的。制备了两种不同的溶胶:用于设计阻隔涂层(称为GT)的溶胶,其功能是保护镁合金免受腐蚀;用于设计仿生涂层的溶胶和其他浓度不同的硝酸钙溶胶(称为GTCa),沉积在GT涂层上。结果证实,GT涂层增强了Hank溶液中基础合金的耐腐蚀性,从而将腐蚀电流密度降低了约两个数量级。此外,GTCa涂层中Ca(II)的存在促进了表面上羟基磷灰石不连续膜的形成,表明这些涂层表现出生物活性。

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