Details

Autor(en) / Beteiligte

• Wu, Jingshi
• Gross, Timothy M.
• Zheng, Zheming
• Hufziger, Kyle T.
• Koseba, Samuel J.
• Youngman, Randall E.
• Smith, Kristy L.

Titel

Steam strengthened glass

Ist Teil von

• Journal of non-crystalline solids, 2024-03, Vol.628, Article 122867

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• •This paper describes a new method for strengthening glass: steam treatment.•Using the steam treatment method, water diffuses into the glass surface layer in a steam environment and generates surface compressive stress.•The compressive stress may be reduced when too much water diffuses into the glass as it speeds up stress relaxation. A novel glass strengthening method is achieved by exposing glass to water vapor under high temperature and pressure to create a surface compressive stress layer. The development of a surface compressive layer during steam strengthening requires consideration of two competing processes: 1.) generation of network strain by a diffusion and reaction mechanism, which is described by water diffusion into the glass, resulting in both molecular water stuffing and hydroxyl group formation reaction to generate swelling and 2.) a time-temperature dependent viscoelastic stress relaxation that is accelerated by reduction in local viscosity due to increased water content. A simulation was conducted to support the proposed strengthening and subsequent stress relaxation mechanisms. The data collected from Raman spectroscopy, 31P and 27Al MAS NMR on steam-treated glasses support the atomic structure changes presented by the diffusion and reaction mechanism.