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Surface coatings of bioactive glasses on high strength ceramic composites

机译:高强度陶瓷复合材料上生物活性玻璃的表面涂层

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摘要

Dense and ultrafine alumina-zirconia composites (Al_2O_3-16 wt%ZrO_2 and ZrO_2-20 wt%Al_2O_3) are developed and characterized for load bearing prosthetic applications. The improvement of the ceramic/ bone interface, namely of the ceramic bioactivity, is performed by a glass coating on the surface of the composites. A new composition is used to produce the glass powder, by melting at 1550 ℃ the mixture of oxide raw materials. The processing to obtain a homogeneous and adherent coating on the ceramic substrates is investigated: the optimal temperature for the glazing treatment is 1200 ℃. The microstructure of the coating and of the ceramic/coating interface, the adhesion and some mechanical properties of the prepared glass and of the coating are analyzed. Besides, the in vitro bioactive responses, by incubation of osteoblast-like cells on the coated samples, are evaluated: positive results are confirmed after 24 h and 72 h.
机译:开发了致密且超细的氧化铝-氧化锆复合材料(Al_2O_3-16 wt%ZrO_2和ZrO_2-20 wt%Al_2O_3),并表征了其在承重义肢中的应用。陶瓷/骨界面的改善,即陶瓷生物活性的改善,是通过在复合材料表面上的玻璃涂层实现的。一种新的成分被用来生产玻璃粉末,通过在1550℃下熔化氧化物原料的混合物。研究了在陶瓷基体上获得均匀附着的涂层的工艺:上光处理的最佳温度为1200℃。分析了涂层和陶瓷/涂层界面的微观结构,制备的玻璃和涂层的粘附性以及一些机械性能。此外,通过在包被的样品上培养成骨细胞样细胞,评估了体外生物活性反应:在24小时和72小时后确认了阳性结果。

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  • 来源
    《Applied Surface Science》 |2009年第14期|6679-6685|共7页
  • 作者单位

    ISTEC-CNR, Via Cranarolo number 64, 48018, Faenza (RA), Italy;

    ISTEC-CNR, Via Cranarolo number 64, 48018, Faenza (RA), Italy;

    ISTEC-CNR, Via Cranarolo number 64, 48018, Faenza (RA), Italy;

    ISTEC-CNR, Via Cranarolo number 64, 48018, Faenza (RA), Italy;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    biofunctionalization;

    机译:生物功能化;

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