Development of magnesium‐aluminum‐silicate glass‐ceramics nucleated with Nb 2 O 5 | Zendy

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

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Development of magnesium‐aluminum‐silicate glass‐ceramics nucleated with Nb 2 O 5

Author(s) -

Benitez Tobias,

Veber Alexander,

Pagnan Furlan Kaline,

Barros Rebouças Lara,

Ligny Dominique,

Hotza Dachamir,

Novaes de Oliveira Antonio Pedro,

Travitzky Nahum

Publication year - 2020

Publication title -

international journal of applied glass science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.383

H-Index - 34

eISSN - 2041-1294

pISSN - 2041-1286

DOI - 10.1111/ijag.13874

Subject(s) - materials science , ceramic , silicate , indentation , knoop hardness test , aluminium , magnesium , composite material , mineralogy , metallurgy , indentation hardness , chemical engineering , microstructure , chemistry , engineering

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. Nb 2 O 5 , MoO 3 and TiO 2 +ZrO 2 were added as nucleating agents at the same molar proportion (1.0%). MAS glass‐ceramics nucleated with Nb 2 O 5 are strike face candidates for security windows when relevant outputs are taken into account, such as transparency, crack resistance, hardness and feasibility. Nb 2 O 5 ‐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.

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