School of Materials Science and Engineering, Pusan National University, Pusan, 609-735, South Korea.
J Mater Sci Mater Med. 2010 May;21(5):1489-94. doi: 10.1007/s10856-010-3999-3. Epub 2010 Jan 22.
Biomimetic apatite coatings on chemically modified titanium powder have been processed and the resulting coating layers evaluated in terms of morphology, composition and structure, using TF-XRD, XPS, SEM, TEM and FTIR analysis. After 7 days immersion in a simulated body fluid (SBF), nanometer-sized fine precipitates with an amorphous whisker-like phase and a Ca/P atomic ratio of 1.94 were obtained on the external surface of the titanium particles. When the immersion time in SBF was extended to 16 days, the coating layer consisted of the whisker-like nanostructured crystals of carbonated hydroxyapatite with a atomic ratio of 3; in such a case, a double coating layer was developed. The double layer could be divided into two regions and could be clearly distinguished: an inner dense region (approximately 200 nm in thickness) which may include hard agglomerated crystals and an outer less dense region (> 500 nm in thickness) in which crystals are loosely distributed.
已对经过化学改性的钛粉进行了仿生磷灰石涂层处理，并使用 TF-XRD、XPS、SEM、TEM 和 FTIR 分析对所得涂层的形貌、组成和结构进行了评估。在模拟体液（SBF）中浸泡 7 天后，在钛颗粒的外表面获得了纳米级细小的无定形须状相和 Ca/P 原子比为 1.94 的沉淀物。当在 SBF 中的浸泡时间延长至 16 天时，涂层层由具有原子比为 3 的碳酸羟基磷灰石的须状纳米结构晶体组成；在这种情况下，形成了双层涂层。双层可以分为两个区域并可以清晰区分：一个是较厚的（约 200nm）致密内层（可能包括硬团聚晶体）和较厚的（>500nm）较疏松的外层（其中晶体分布疏松）。
