Breaking the Limit of Micro‐Ductility in Oxide Glasses
Open Access
- 24 July 2019
- journal article
- research article
- Published by Wiley in Advanced Science
- Vol. 6 (18), 1901281
- https://doi.org/10.1002/advs.201901281
Abstract
Oxide glasses are one of the most important engineering and functional material families owing to their unique features, such as tailorable physical properties. However, at the same time intrinsic brittleness has been their main drawback, which severely restricts many applications. Despite much progress, a breakthrough in developing ultra‐damage‐resistant and ductile oxide glasses still needs to be made. Here, a critical advancement toward such oxide glasses is presented. In detail, a bulk oxide glass with a record‐high crack resistance is obtained by subjecting a caesium aluminoborate glass to surface aging under humid conditions, enabling it to sustain sharp contact deformations under loads of ≈500 N without forming any strength‐limiting cracks. This ultra‐high crack resistance exceeds that of the annealed oxide glasses by more than one order of magnitude, making this glass micro‐ductile. In addition, a remarkable indentation behavior, i.e., a time‐dependent shrinkage of the indent cavity, is demonstrated. Based on structural analyses, a molecular‐scale deformation model to account for both the ultra‐high crack resistance and the time‐dependent shrinkage in the studied glass is proposed.Keywords
Funding Information
- Villum Fonden (13253)
- National Science Foundation (1562066, 1762292, 1826420)
This publication has 43 references indexed in Scilit:
- Towards Ultrastrong GlassesAdvanced Materials, 2011
- Autonomic Self‐Repairing Glassy MaterialsAdvanced Functional Materials, 2010
- Electron-beam-assisted superplastic shaping of nanoscale amorphous silicaNature Communications, 2010
- Open for businessNature Communications, 2010
- Elastic Properties and Short‐to Medium‐Range Order in GlassesJournal of the American Ceramic Society, 2007
- Engineered Stress‐Profile Silicate Glass: High Strength Material Insensitive to Surface Defects and FatigueAdvanced Engineering Materials, 2004
- Raman Investigation of Surface OH-Species in Porous SilicaThe Journal of Physical Chemistry B, 2003
- A New Low‐Brittleness Glass in the Soda‐Lime‐Silica Glass FamilyJournal of the American Ceramic Society, 1998
- Water Entry into Silica Glass During Slow Crack GrowthJournal of the American Ceramic Society, 1991
- Influence of Water Vapor on Crack Propagation in Soda-Lime GlassJournal of the American Ceramic Society, 1967