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Science. 2019 Jun 28;364(6447):1260-1263. doi: 10.1126/science.aaw8988.

Impact-resistant nacre-like transparent materials.

Author information

1
Department of Mechanical Engineering, McGill University, Montreal, Quebec H3A 2K6, Canada.
2
Department of Mechanical Engineering, McGill University, Montreal, Quebec H3A 2K6, Canada. francois.barthelat@mcgill.ca.

Abstract

Glass has outstanding optical properties, hardness, and durability, but its applications are limited by its inherent brittleness and poor impact resistance. Lamination and tempering can improve impact response but do not suppress brittleness. We propose a bioinspired laminated glass that duplicates the three-dimensional "brick-and-mortar" arrangement of nacre from mollusk shells, with periodic three-dimensional architectures and interlayers made of a transparent thermoplastic elastomer. This material reproduces the "tablet sliding mechanism," which is key to the toughness of natural nacre but has been largely absent in synthetic nacres. Tablet sliding generates nonlinear deformations over large volumes and significantly improves toughness. This nacre-like glass is also two to three times more impact resistant than laminated glass and tempered glass while maintaining high strength and stiffness.

PMID:
31249053
DOI:
10.1126/science.aaw8988

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