Roy Barsheek, Rosin Andreas, Gerdes Thorsten, Schafföner Stefan
Keylab Glass Technology, Chair of Ceramic Materials Engineering, University of Bayreuth, Prof. Rüdiger-Bormann-Str. 1, 95447, Bayreuth, Germany.
Sci Rep. 2022 Feb 17;12(1):2681. doi: 10.1038/s41598-022-06649-y.
Scratch formation on glass surfaces is a ubiquitous phenomenon induced by plastic deformation, often accompanied by radial, lateral or median cracks with consequent chipping and brittle fracture caused during and after the event of dynamic abrasion instigated by shear stress by a harder material. This paper addresses the fundamental aspect of scratch formation on soda-lime-silica (SLS) glass surfaces. A constructive combination of surface-sensitive characterization tools, including field emission scanning electron microscopy (FESEM), laser scanning microscopy (LSM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and instrumented indentation technique (IIT), helped to investigate the structural cause of generation of visible scratches on SLS glass surfaces. The experimental results indicate that a silicate network possessing a mechanically weakening structural characteristic in terms of network connectivity confined to the region between 5 and 100 nm below the glass surface is likely to cause a destructive surface scratch eminently visible to the naked eye.
玻璃表面的划痕形成是一种由塑性变形引起的普遍现象，通常伴随着径向、横向或中间裂纹，进而在由较硬材料的剪切应力引发的动态磨损过程中和之后导致崩裂和脆性断裂。本文探讨了钠钙硅（SLS）玻璃表面划痕形成的基本方面。通过结合使用多种表面敏感表征工具，包括场发射扫描电子显微镜（FESEM）、激光扫描显微镜（LSM）、X射线光电子能谱（XPS）、拉曼光谱和仪器化压痕技术（IIT），有助于研究SLS玻璃表面产生可见划痕的结构原因。实验结果表明，在玻璃表面以下5至100纳米区域内，就网络连通性而言具有机械弱化结构特征的硅酸盐网络，很可能会导致肉眼明显可见的破坏性表面划痕。
