Local densification of a single micron sized silica sphere by uniaxial compression
Local densification of a single micron sized silica sphere by uniaxial compression
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DOI：
10.1016/j.scriptamat.2015.06.023
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发表时间：
2015-11
影响因子：
6
通讯作者：
Stefan Romeis;Jonas Paul;P. Herre;D. Ligny;Jochen Schmidt;W. Peukert
中科院分区：
文献类型：
--
作者：
Stefan Romeis;Jonas Paul;P. Herre;D. Ligny;Jochen Schmidt;W. Peukert
在原位单轴压缩实验中进行了紧凑的玻璃体SiO2微粒的SEM内。通过显微拉曼光谱对塑性变形颗粒的局部结构进行了空间分辨。通过应用密度校准曲线，仅在略低于圆形接触区域的区域中发现11%的最大二氧化硅网络致密化。粒子的内部区域不受影响。从几何考虑的结论表明，在压缩过程中观察到的塑性是完全容纳的局部致密化。
In situuniaxial compression experiments are performed inside a SEM for compact vitreous SiO2microparticles. The local structure of a plastically deformed particle is assessed spatially resolvedex situby micro Raman spectroscopy. By application of a density calibration curve a maximum silica network densification of 11% is found only in zones slightly below the circular contact areas. The particle’s inner regions remain unaffected. Conclusions from geometric considerations indicate that the observed plasticity during compression is completely accommodated by local densification.