Scratch-induced yielding and ductile fracture in silicate glasses probed by nanoindentation

Sawamura S, Limbach R, Wilhelmy S, Koike A, Wondraczek L (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Journal of the American Ceramic Society Wiley-Blackwell

Book Volume: 102

Pages Range: 7299-7311

Journal Issue: 12

DOI: 10.1111/jace.16679

Abstract

Lateral nanoindentation provides access to the scratch hardness of glass surfaces. The specific sensitivity of the scratching experiment to surface mechanical properties can be enhanced when the local load at the tip apex is reduced. Here, we report on ramp-load scratch tests on a range of silicate glasses using a sphero-conical tip shape. Similar as with regular scratching experiments using sharp indenters, such tests create a sequence of micro-ductile, micro-cracking, and micro-abrasive regimes. Detailed investigation of the indenter displacement h and of the lateral force FL as recorded in situ, however, reveals pronounced deviations in comparison to Vickers or Berkovich scratching experiments. Most notably, this includes an abrupt increase in both h and FL at moderate normal load, marking the onset of ductile fracture, and a yield point at the transition from fully elastic deformation to the elastic-plastic regime at low load. For the range of examined silicate glasses, we find that structural cohesion controls yielding, whereas scratch-induced fracture and micro-abrasion are dominated by the volume density of bond energy.

Authors with CRIS profile

Lothar Wondraczek

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Asahi Glass (AGC) / 旭硝子 JP Japan (JP)

How to cite

APA:

Sawamura, S., Limbach, R., Wilhelmy, S., Koike, A., & Wondraczek, L. (2019). Scratch-induced yielding and ductile fracture in silicate glasses probed by nanoindentation. Journal of the American Ceramic Society, 102(12), 7299-7311. https://doi.org/10.1111/jace.16679

MLA:

Sawamura, Shigeki, et al. "Scratch-induced yielding and ductile fracture in silicate glasses probed by nanoindentation." Journal of the American Ceramic Society 102.12 (2019): 7299-7311.

BibTeX: Download