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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 >Indentation crack initiation behavior of vitreous silica glasses containing different hydroxyl concentration
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Indentation crack initiation behavior of vitreous silica glasses containing different hydroxyl concentration

机译：羟基含量不同的石英玻璃压痕裂纹萌生行为

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摘要

The indentation crack initiation behavior of eight vitreous silica specimens containing bulk OH concentrations ranging from 0.2 to 754 wt ppm was investigated. A recording microindentation instrument equipped with optical observation and acoustic emission detection was used to study, in situ, the cracking behavior from indentation with a Vickers diamond. No significant differences in the threshold loads for various types of cracking behavior of the specimens were found. In addition, the polishing medium was found to have little influence on the cracking behavior. The lengths of median-radial cracks around indentations varied little between specimens. The Vickers hardness of the specimens measured at 0.98 N ranged from 6.6 +/- 0.3 GPa to 7.5 +/- 0.7 GPa, and no trend with the OH concentration was apparent. In addition, the Vickers hardness of the specimens measured while under a 9.81 N maximum load (LVHmax), showed little variation, and no apparent trend with the OH concentration. (C) 2007 Elsevier B.V. All rights reserved.
机译：研究了八个OH含量在0.2至754 wt ppm范围内的石英玻璃样品的压痕裂纹萌生行为。使用配备有光学观察和声发射检测的记录微压痕仪，原位研究维氏金刚石压痕产生的开裂行为。对于各种类型的试样开裂行为，在阈值载荷上没有发现显着差异。另外，发现抛光介质对龟裂行为几乎没有影响。压痕周围的中位径向裂纹的长度在样品之间变化很小。在0.98N下测得的样品的维氏硬度在6.6 +/- 0.3GPa至7.5 +/- 0.7GPa的范围内，并且没有明显的OH浓度趋势。另外，在9.81N的最大载荷（LVHmax）下测得的样品的维氏硬度几乎没有变化，并且OH浓度没有明显的趋势。 （C）2007 Elsevier B.V.保留所有权利。

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