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首页> 外文期刊>Acta biomaterialia >Hydroxyapatite/titania sol-gel coatings on titanium-zirconium alloy for biomedical applications.
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Hydroxyapatite/titania sol-gel coatings on titanium-zirconium alloy for biomedical applications.

机译：用于生物医学应用的钛锆合金上的羟基磷灰石/二氧化钛溶胶-凝胶涂层。

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摘要

A simple sol-gel method was developed for hydroxyapatite/titania (HA/TiO(2)) coatings on non-toxic titanium-zirconium (TiZr) alloy for biomedical applications. The HA/TiO(2)-coated TiZr alloy displayed excellent bioactivity when soaked in a simulated body fluid (SBF) for an appropriate period. Differential scanning calorimetry, thermogravimetric analysis, X-ray diffraction and scanning electron microscopy-energy dispersive spectrometry were used to characterize the phase transformations and the surface structures and to assess the in vitro tests. The HA/TiO(2) layers were spin-coated on the surface of TiZr alloy at a speed of 3000rpm for 15s, followed by a heat treatment at 600 degrees C for 20min in an argon atmosphere sequentially. The TiO(2) layer exhibited a cracked surface and an anatase structure and the HA layer displayed a uniform dense structure. Both the TiO(2) and HA layers were 25microm thick, and the total thickness of the HA/TiO(2) coatings was 50microm. The TiZr alloy after the above HA/TiO(2) coatings displayed excellent bone-like apatite-forming ability when soaked in SBF and can be anticipated to be a promising load-bearing implant material.
机译：一种简单的溶胶-凝胶方法被开发用于生物医学应用的无毒钛-锆（TiZr）合金上的羟基磷灰石/二氧化钛（HA / TiO（2））涂层。当将HA / TiO（2）涂层的TiZr合金浸泡在模拟体液（SBF）中适当的时间后，其表现出出色的生物活性。差示扫描量热法，热重分析，X射线衍射和扫描电子显微镜-能量色散光谱法用于表征相变和表面结构并评估体外测试。将HA / TiO（2）层以3000rpm的速度旋涂在TiZr合金的表面上15秒钟，然后依次在氩气气氛中在600摄氏度下热处理20分钟。 TiO（2）层显示出裂纹的表面和锐钛矿结构，而HA层显示出均匀的致密结构。 TiO（2）和HA层都为25微米厚，HA / TiO（2）涂层的总厚度为50微米。上面的HA / TiO（2）涂层后的TiZr合金在SBF中浸泡后显示出优异的骨状磷灰石形成能力，可以预期是一种有前途的承重植入材料。

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