Hydroxyapatite coatings were directly prepared on anodized titanium by electro-deposition method in a modified simulated body fluid.The configuration,structure and bioactivity of the coating were investigated with sca...Hydroxyapatite coatings were directly prepared on anodized titanium by electro-deposition method in a modified simulated body fluid.The configuration,structure and bioactivity of the coating were investigated with scanning electron microscopy(SEM),X-ray diffraction analyzer(XRD)and Fourier transform infrared spectros-copy(FTIR)techniques.The results demonstrated that pure and homogeneous hydroxyapatite coating can be obtained without any post-treatment.The prepared coating showed good bioactivity in simulated body fluid(SBF).The time required for a fully covered dense hydroxyapatite coatings was 4 days immersion in SBF.展开更多
反应堆压力容器的压力-温度限值曲线(P-T限值曲线)方法是确保压力容器完整性的重要方法,在处理压力容器老化延寿问题中有着重要意义。传统的方法利用由t-RTNDT曲线表征的材料准静态断裂韧性限值(KIc)绘制P-T曲线,这种方法不能直接测量...反应堆压力容器的压力-温度限值曲线(P-T限值曲线)方法是确保压力容器完整性的重要方法,在处理压力容器老化延寿问题中有着重要意义。传统的方法利用由t-RTNDT曲线表征的材料准静态断裂韧性限值(KIc)绘制P-T曲线,这种方法不能直接测量材料辐照后的材料无延性转变温度的参考温度(RTNDT),且过于保守。本文针对某核电厂压力容器,利用现有的辐照监督管数据估计50a延寿期末主曲线参考温度RTT0,并采用ASME Code Case N629中的主曲线应用方法,计算寿期末的P-T限值曲线。与传统方法得到的P-T限值曲线相比,利用主曲线方法可以得到更大的运行窗口,能够提高设备的经济性。展开更多
基金Supported by the Young Scholars Fund of Beijing University of Chemical Technology(QN0713)
文摘Hydroxyapatite coatings were directly prepared on anodized titanium by electro-deposition method in a modified simulated body fluid.The configuration,structure and bioactivity of the coating were investigated with scanning electron microscopy(SEM),X-ray diffraction analyzer(XRD)and Fourier transform infrared spectros-copy(FTIR)techniques.The results demonstrated that pure and homogeneous hydroxyapatite coating can be obtained without any post-treatment.The prepared coating showed good bioactivity in simulated body fluid(SBF).The time required for a fully covered dense hydroxyapatite coatings was 4 days immersion in SBF.
文摘反应堆压力容器的压力-温度限值曲线(P-T限值曲线)方法是确保压力容器完整性的重要方法,在处理压力容器老化延寿问题中有着重要意义。传统的方法利用由t-RTNDT曲线表征的材料准静态断裂韧性限值(KIc)绘制P-T曲线,这种方法不能直接测量材料辐照后的材料无延性转变温度的参考温度(RTNDT),且过于保守。本文针对某核电厂压力容器,利用现有的辐照监督管数据估计50a延寿期末主曲线参考温度RTT0,并采用ASME Code Case N629中的主曲线应用方法,计算寿期末的P-T限值曲线。与传统方法得到的P-T限值曲线相比,利用主曲线方法可以得到更大的运行窗口,能够提高设备的经济性。
