Residual stress versus microstructural effects on the strength and toughness of phase-separated PbO-B2O3-Al2O3 glasses

Article Materials Science, Ceramics

Microstructural and residual stress effects on toughening of stoichiometric BaO.2SiO2 glass-ceramics

Simone do Rocio Ferraz Sabino et al.

Summary: Barium disilicate glass-ceramics (GCs) with varying crystallized volume fraction and crystal size were studied for their fracture strength and toughness. The results showed that fracture toughness increased with larger spherulite size and higher crystallized volume fraction. The type of residual stress in the crystals did not affect fracture toughness and strength.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2022)

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Article Materials Science, Ceramics

Influence of phase separation microstructure on the mechanical properties of transparent modifier-free glasses

Qi Zhang et al.

Summary: In this study, the size of nanoscale droplets in a phase-separated glass was controlled using heat treatment, and the effect of phase separation on mechanical properties was investigated. The results showed that reducing the size of droplets and increasing the proportion of the droplet phase led to improved crack initiation resistance. Additionally, the aggregation of droplets at specific heat treatment conditions increased the fracture toughness, while the hardness of the glass slightly increased.

JOURNAL OF NON-CRYSTALLINE SOLIDS (2022)

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Article Materials Science, Ceramics

Microstructure, residual stresses, and mechanical performance of surface crystallized translucent glass-ceramics

Debora Cristina Niero Fabris et al.

Summary: This study produced lithia-alumina-silica glass-ceramics with different crystallized layer thicknesses by inducing surface crystallization of a low coefficient of thermal expansion phase, and analyzed their effects on mechanical properties. It unveiled the causes of improved mechanical properties and validated the concept that surface crystallization is a valuable technique for developing high strength glass-ceramics.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY (2022)

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Article Materials Science, Multidisciplinary

Toughening of soda-lime-silica glass by nanoscale phase separation: Molecular dynamics study

Johan F. S. Christensen et al.

Summary: The addition of glassy silica droplets in oxide glasses is shown to enhance the material and increase fracture toughness by impeding crack propagation. This has significant implications for the experimental design of oxide glasses with controlled nanoscale phase separation.

PHYSICAL REVIEW MATERIALS (2021)

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Article Materials Science, Ceramics