Dissolution behaviour of calcium phosphate coatings obtained by laser ablation.
Dissolution behaviour of calcium phosphate coatings obtained by laser ablation.
复制标题
激光烧蚀获得的磷酸钙涂层的溶解行为。
DOI：
10.1016/s0142-9612(98)00063-5
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发表时间：
1998
期刊：
影响因子：
14
通讯作者：
J. Morenza
中科院分区：
文献类型：
--
作者：
L. Clèries;J. Fernández;G. Sardin;J. Morenza
在模拟生理条件下对钛合金上脉冲激光沉积的磷酸钙涂层进行了测试，以评估其形貌、成分和结构的变化。在不同条件下沉积涂层以获得不同的晶体结构，范围从非晶相和混合晶相到纯晶态羟基磷灰石（HA）。将涂层样品浸入无钙汉克平衡盐溶液中长达 5 天。通过浸入前后的 X 射线衍射、扫描电子显微镜和傅里叶变换拉曼光谱对涂层进行表征。还通过其质量损失和钙释放来监测它们的溶解行为。纯 HA 涂层在溶液中暴露期间保持其形态和结构。在由 HA 与磷酸四钙 (TetraCP) 或 β-磷酸三钙 (β-TCP) 与 α-磷酸三钙 (α-TCP) 组成的多相涂层中，微孔性是由 TetraCP 或 α-TCP 完全溶解引起的。无定形磷酸钙涂层完全溶解。
Pulsed laser deposited calcium phosphate coating on titanium alloy have been tested under simulated physiological conditions in order to evaluate the changes in morphology, composition and structure. The coatings were deposited under different conditions to obtain different crystalline structures, ranging from amorphous and mixed crystalline phases to pure crystalline hydroxyapatite (HA). The coated samples were immersed in a Ca-free Hank’s balanced salt solution for up to 5 days. Characterization of the coatings was performed by X-ray diffraction, scanning electron microscopy and Fourier-transform Raman spectroscopy before and after immersion. Their dissolution behaviour was also monitored through their mass loss and calcium release. Coatings of pure HA preserve their morphology and structure during the exposure time in solution. In multiphasic coatings, consisting of HA with tetracalcium phosphate (TetraCP) or β-tricalcium phosphate (β-TCP) with a-tricalcium phosphate (α-TCP), microporosity is induced by the complete dissolution of TetraCP or α-TCP. Amorphous calcium phosphate coatings totally dissolve.