Micromechanical properties of (Na,Zn)-sulfophosphate glasses

Micromechanical properties of (Na,Zn)-sulfophosphate glasses
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(Na,Zn)-硫磷酸盐玻璃的微观机械性能

DOI:
10.1016/j.jnoncrysol.2012.01.045
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发表时间:
2012
影响因子:
3.5
通讯作者:
L. Wondraczek
L. Wondraczek
中科院分区:
材料科学2区
文献类型:
--
作者:
S. Striepe;J. Deubener;L. Wondraczek

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采用超声和维氏压痕法测定了含硫磷酸锌钠玻璃的弹性常数、硬度和抗裂性能。在玻璃结构中掺入高达35mol%的硫,导致摩尔体积减少23%,泊松比增加到约0.32。随着玻璃结构的压实,抗永久变形和开裂的能力降低,即在正常气氛下测试时,观察到较软的硫酸盐玻璃具有更脆的特性。在氮气流动条件下,裂纹与压痕尺寸比的组分依赖性较弱,表明表面反应主导了硫酸盐玻璃的微机械裂纹萌生。
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 35mol% 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 N2gas 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.
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发表时间: 2011-10-18
期刊: ADVANCED MATERIALS
影响因子: 29.4
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