Role of Mobile Cations on Microplasticity in Alumino‐Phosphate Glasses
Role of Mobile Cations on Microplasticity in Alumino‐Phosphate Glasses
复制标题
移动阳离子对铝磷酸盐玻璃微塑性的作用
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
M. Ramonda
中科院分区：
文献类型：
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作者：
A. Faivre;F. Despetis;Florie Guillaume;P. Solignac;M. Ramonda
氧化物玻璃中的室温微塑性现象归因于致密化和剪切流动的综合作用，然而，其起源仍然是推测性的。使用原子力显微镜成像分析的压印拓扑结构所产生的显微压痕在混合碱铝磷酸盐玻璃，我们表明，在表面置换的物质的量与碱的流动性。这些结果导致的结论是，移动的碱协助剪切流动过程中产生的压痕在室温下，这些过程对应于塑性，而不是粘性流。
Room-temperature microplastic phenomena in oxide glasses are attributed to the combined effects of densification and shear flow, the origin of which, however, remains speculative. Using atomic force microscopy imaging to analyze the imprint topology created by microindentation in mixed alkali alumino-phosphate glasses, we show that the amount of matter displaced at the surface is correlated with the alkali mobility. These results lead to the conclusion that mobile alkali assists shear flow processes produced by indentation at room temperature and that these processes correspond to plastic rather than viscous flow.