Local densification of a single micron sized silica sphere by uniaxial compression

被引：27

作者：

Romeis, Stefan ^{[1
]}

Paul, Jonas ^{[1
]}

Herre, Patrick ^{[1
]}

de Ligny, Dominique ^{[2
]}

Schmidt, Jochen ^{[1
]}

Peukert, Wolfgang ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Inst Particle Technol, D-91058 Erlangen, Germany

[2] Univ Erlangen Nurnberg, Inst Glass & Ceram, D-91058 Erlangen, Germany

来源：

SCRIPTA MATERIALIA | 2015年 / 108卷

关键词：

Silica glass; Scanning electron microscopy (SEM); Raman spectroscopy; Deformation structure; Plastic deformation; DEFORMATION; INDENTATION; RADIATION; MODEL;

D O I：

10.1016/j.scriptamat.2015.06.023

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In situ uniaxial compression experiments are performed inside a SEM for compact vitreous SiO2 micropartides. The local structure of a plastically deformed particle is assessed spatially resolved ex situ by 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. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：84 / 87

页数：4

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