Sani G, Limbach R, Dellith J, Sokmen I, Wondraczek L (2021)
Publication Type: Journal article
Publication year: 2021
Book Volume: 104
Pages Range: 3167-3186
Journal Issue: 7
DOI: 10.1111/jace.17758
We report on surface elasticity, plastic deformation and crack initiation of chemically strengthened soda-lime silicate and sodium aluminosilicate glasses during lateral indentation and scratch testing. Instrumented indentation using a normal indenter set-up corroborated previous findings on the effects of chemical strengthening on surface Young's modulus, hardness, and indentation cracking. Using lateral indentation in the elastic-plastic regime, we find a pronounced increase in the scratch hardness as a result of chemical strengthening, manifest in higher work of deformation required for creating the scratch groove. Thereby, the glass composition is found to play a stronger role than the absolute magnitude of surface compressive stress. Using a blunt conical stylus for instrumented scratch testing reveals three distinct modes of scratch-induced surface fracture, which occur during scratching or after unloading. Occasional micro-cracking caused by pre-existing surface flaws at low scratching load can be completely suppressed through chemical strengthening. The intrinsic defect resistance to microcracking is reduced as a result of ion stuffing, depending on the initial glass composition, whereas the resistance to abrasive yielding is enhanced by several hundred MPa.
APA:
Sani, G., Limbach, R., Dellith, J., Sokmen, I., & Wondraczek, L. (2021). Surface damage resistance and yielding of chemically strengthened silicate glasses: From normal indentation to scratch loading. Journal of the American Ceramic Society, 104(7), 3167-3186. https://doi.org/10.1111/jace.17758
MLA:
Sani, Gohar, et al. "Surface damage resistance and yielding of chemically strengthened silicate glasses: From normal indentation to scratch loading." Journal of the American Ceramic Society 104.7 (2021): 3167-3186.
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