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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Effects of OH content, water vapor pressure, and temperature on sub-critical crack growth in phosphate glass
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Effects of OH content, water vapor pressure, and temperature on sub-critical crack growth in phosphate glass

机译：OH含量，水蒸气压力和温度对磷酸盐玻璃中亚临界裂纹扩展的影响

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摘要

The effects of temperature and water vapor pressure on the rate of sub-critical crack growth in meta-phosphate laser glasses containing different OH concentrations (128 and 773 ppmw) are reported. The crack velocity was measured using the double-cleavage-drilled-compression method. When plotted as a function of stress intensity, the samples have the classic region I, II and III crack growth properties similar to that reported for silicate glasses. The glass containing the larger OH content has a 10-fold greater crack velocity in region I; crack velocities is region II are the nearly the same for both glasses. The crack velocities are analyzed using a chemical kinetic and mass-transport limited reaction rate model. At temperatures >150 degrees C and water vapor pressures >10 mmHg, crack tip blunting is observed and the glass containing the larger OH content is more prone to blunting. (C) 2000 Published by Elsevier Science B.V. All rights reserved. [References: 42]
机译：据报道，温度和水蒸气压力对含有不同OH浓度（128和773 ppmw）的偏磷酸盐激光玻璃中亚临界裂纹扩展速率的影响。使用双裂钻压缩法测量裂纹速度。当绘制为应力强度的函数时，样品的经典I，II和III裂纹扩展特性与硅酸盐玻璃报告的相似。含有较大OH的玻璃在区域I中的裂纹速度大10倍;裂纹速度是两个玻璃区域的II几乎相同。使用化学动力学和传质限制反应速率模型分析裂纹速度。在> 150摄氏度的温度和> 10 mmHg的水蒸气压力下，观察到裂纹尖端变钝，并且含有较大OH含量的玻璃更容易变钝。 （C）2000，Elsevier Science B.V.保留所有权利。 [参考：42]

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