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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 >Dimensional changes of silica-, borosilicate- and germania-glasses and quartz under irradiation
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Dimensional changes of silica-, borosilicate- and germania-glasses and quartz under irradiation

机译：辐照下二氧化硅，硼硅酸盐和锗玻璃和石英的尺寸变化

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摘要

Length changes of crystalline SiO2, of two SiO2 glasses (HERASIL1, SUPRASIL1), of two SiO2-B2O3 glasses (DURAN, VYCOR) and of vitreous GeO2 were measured during proton, electron and UV irradiations under various applied tensile stresses at temperatures up to 400 degrees C. No change was observed under UV irradiation, while proton and electron irradiation initially caused transient compaction and subsequent irradiation induced creep with linear stress dependence (viscous flow). Asymptotic compaction strain is reduced at elevated temperatures due to recovery processes, while creep rate is virtually independent of temperature. Compaction tends to decrease while creep rate increases with decreasing SiO2 content of the glasses. A comparison of flow rates to electronic and nuclear stopping power gives no safe discrimination of the underlying mechanisms. Quartz shows continuous dilatation under proton irradiation, with a very low stress dependence, which allows only determination of an upper limit of viscous flow compliance. (c) 2005 Elsevier B.V. All rights reserved.
机译：在质子，电子和紫外线照射下，在高达400°C的温度下，在质子，电子和紫外线照射下，测量了晶体SiO2，两种SiO2玻璃（HERASIL1，SUPRASIL1），两种SiO2-B2O3玻璃（DURAN，VYCOR）和玻璃态GeO2的长度变化。在紫外线辐射下未观察到变化，而质子和电子辐射最初引起瞬态压实，随后的辐射诱导蠕变具有线性应力依赖性（粘性流）。由于恢复过程，在升高的温度下渐近压实应变降低，而蠕变速率实际上与温度无关。随着玻璃中SiO 2含量的降低，压实度趋于降低，而蠕变速率增加。将流率与电子和核制停功率进行比较，并不能安全地区分基本机制。石英在质子辐照下显示出连续的膨胀，具有非常低的应力依赖性，这仅允许确定粘性流顺应性的上限。 （c）2005 Elsevier B.V.保留所有权利。

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