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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 >Micromechanical properties of (Na,Zn)-sulfophosphate glasses
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Micromechanical properties of (Na,Zn)-sulfophosphate glasses

机译：（Na，Zn）-Sulfophosphate玻璃的微机械性能

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Elastic constants, hardness and crack initiation resistance of sulfur-bearing sodium-zinc-phosphate glasses were determined by ultrasonic echography and Vickers indentation experiments. Incorporation of up to 35 mol% of sulfur into the glass structure resulted in a decrease in molar volume of 23% and an increase of Poisson's ratio up to a value of ? 0.32. Resistance against permanent deformation and cracking decreased with compaction of the glass structure, i.e. a more brittle character of softer sulfophosphate glasses was observed when tested under normal atmosphere. Under flowing N _2 gas only a weak compositional dependence of the crack-to-indent size ratio was evident, which indicates that surface reactions dominate micromechanical crack initiation in sulfophosphate glasses.
机译：通过超声回波描记术和维氏压痕实验确定了含硫的钠锌磷酸盐玻璃的弹性常数，硬度和抗开裂性。在玻璃结构中最多掺入35 mol％的硫，摩尔体积减少23％，泊松比增加到λ值。 0.32。随着玻璃结构的压实，抗永久变形和破裂的能力降低，即，在正常气氛下测试时，观察到较软的磺基磷酸盐玻璃的脆性更大。在流动的N _2气体下，仅可见到裂纹与凹痕尺寸比的微弱成分依赖性，这表明表面反应在磺磷酸盐玻璃的微机械裂纹萌生中起主要作用。

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