Development of magnesium-aluminum-silicate glass-ceramics nucleated with Nb2O5

Tobias Benitez, Alexander Veber, Kaline Pagnan Furlan, Lara Barros Rebouças, Dominique de Ligny, Dachamir Hotza, Antonio Pedro Novaes de Oliveira, Nahum Travitzky

Research output: Contribution to journalArticle

Abstract

The influence of nucleating agents and heat-treatments on magnesium-aluminum-silicate (MAS) glass-ceramics was studied. MAS precursor glasses were melted in oxidant (air) and reducing atmospheres. Nb2O5, MoO3 and TiO2+ZrO2 were added as nucleating agents at the same molar proportion (1.0%). MAS glass-ceramics nucleated with Nb2O5 are strike face candidates for security windows when relevant outputs are taken into account, such as transparency, crack resistance, hardness and feasibility. Nb2O5-doped MAS can achieve up to 20% crystalline volume fraction, while keeping the visible transparency close to 70%. Knoop hardness was raised up to 7.4 GPa in comparison to precursor glass (6.2 GPa), considering the indentation size effect. The crack resistance reached 4 N.

Original languageEnglish
Pages (from-to)155-169
Number of pages15
JournalInternational Journal of Applied Glass Science
Volume11
Issue number1
DOIs
Publication statusPublished - 1 Jan 2020

Keywords

  • armor
  • crystallization
  • impact resistance
  • transparent glass-ceramics

ASJC Scopus subject areas

  • Materials Science(all)

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    Benitez, T., Veber, A., Pagnan Furlan, K., Barros Rebouças, L., de Ligny, D., Hotza, D., Novaes de Oliveira, A. P., & Travitzky, N. (2020). Development of magnesium-aluminum-silicate glass-ceramics nucleated with Nb2O5. International Journal of Applied Glass Science, 11(1), 155-169. https://doi.org/10.1111/ijag.13874