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首页> 外文期刊>Journal of Materials Research >In vitro study of electron beam deposited calcium phosphate coating in simulated body fluid
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In vitro study of electron beam deposited calcium phosphate coating in simulated body fluid

机译：模拟体液中电子束沉积磷酸钙涂层的体外研究

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摘要

Calcium phosphate coatings prepared using the technique of electron beam deposition were immersed in a simulated body fluid for different periods of time to determine their response in vitro. The amorphous as-deposited coatings dissolved completely after a few days of immersion. After annealing in air at 700℃, the dissolution of a small amount of amorphous phase in the crystalline coatings promotes the precipitation of bonelike apatite on the recessed regions by increasing the local supersaturation of calcium and phosphate ions. Formation of apatite was confirmed by the x-ray diffraction peaks at (200), (211), and (203) planes which grew after immersion in simulated body fluid. Fourier transform infrared results conformed to this with the increase in intensity of the absorption band at 1450 cm~(-1), signifying the increase in carbonate content. Scanning electron microscopy results showed spherical-shaped apatite nucleated on dissolved surface after 8 days of immersion. Sixteen days after immersion, almost 80% of the surface area was covered with apatite formation and grew to coalesce between neighboring particles forming an integrated platelike layer after 28 days. No obvious detachment between the grown layer and the underlying coating was observed.
机译：将使用电子束沉积技术制备的磷酸钙涂层浸入模拟体液中不同的时间，以确定其体外反应。浸泡几天后，非晶态沉积涂层完全溶解。在700℃的空气中退火后，少量无定形相在结晶涂层中的溶解会通过增加钙离子和磷酸根离子的局部过饱和来促进凹陷区骨状磷灰石的沉淀。通过在（200），（211）和（203）平面上的X射线衍射峰证实了磷灰石的形成，该峰在浸入模拟体液后生长。傅里叶变换红外光谱结果与1450 cm〜（-1）处吸收带强度的增加相符，表明碳酸盐含量的增加。扫描电子显微镜结果显示，浸泡8天后，球形磷灰石在溶解的表面成核。浸没十六天后，几乎80％的表面积被磷灰石覆盖，并在28天后长成相邻颗粒之间聚结，形成一个完整的板状层。在生长层和下面的涂层之间没有观察到明显的分离。

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  • 来源
    《Journal of Materials Research》 |2007年第3期|p.621-626|共6页
  • 作者

    M. Hamdi; Ari Ide-Ektessabi; J.A. Toque;

  • 作者单位

    Department of Engineering Design and Manufacture, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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