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In situ stable crack growth at the micron scale
Grain boundaries typically dominate fracture toughness, strength and slow crack growth in ceramics. To improve these properties through mechanistically informed grain boundary engineering, precise measurement of the mechanical properties of individual boundaries is essential, although it is rarely a...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5524636/ https://www.ncbi.nlm.nih.gov/pubmed/28740188 http://dx.doi.org/10.1038/s41467-017-00139-w |
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author | Sernicola, Giorgio Giovannini, Tommaso Patel, Punit Kermode, James R. Balint, Daniel S. Britton, T. Ben Giuliani, Finn |
author_facet | Sernicola, Giorgio Giovannini, Tommaso Patel, Punit Kermode, James R. Balint, Daniel S. Britton, T. Ben Giuliani, Finn |
author_sort | Sernicola, Giorgio |
collection | PubMed |
description | Grain boundaries typically dominate fracture toughness, strength and slow crack growth in ceramics. To improve these properties through mechanistically informed grain boundary engineering, precise measurement of the mechanical properties of individual boundaries is essential, although it is rarely achieved due to the complexity of the task. Here we present an approach to characterize fracture energy at the lengthscale of individual grain boundaries and demonstrate this capability with measurement of the surface energy of silicon carbide single crystals. We perform experiments using an in situ scanning electron microscopy-based double cantilever beam test, thus enabling viewing and measurement of stable crack growth directly. These experiments correlate well with our density functional theory calculations of the surface energy of the same silicon carbide plane. Subsequently, we measure the fracture energy for a bi-crystal of silicon carbide, diffusion bonded with a thin glassy layer. |
format | Online Article Text |
id | pubmed-5524636 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-55246362017-07-28 In situ stable crack growth at the micron scale Sernicola, Giorgio Giovannini, Tommaso Patel, Punit Kermode, James R. Balint, Daniel S. Britton, T. Ben Giuliani, Finn Nat Commun Article Grain boundaries typically dominate fracture toughness, strength and slow crack growth in ceramics. To improve these properties through mechanistically informed grain boundary engineering, precise measurement of the mechanical properties of individual boundaries is essential, although it is rarely achieved due to the complexity of the task. Here we present an approach to characterize fracture energy at the lengthscale of individual grain boundaries and demonstrate this capability with measurement of the surface energy of silicon carbide single crystals. We perform experiments using an in situ scanning electron microscopy-based double cantilever beam test, thus enabling viewing and measurement of stable crack growth directly. These experiments correlate well with our density functional theory calculations of the surface energy of the same silicon carbide plane. Subsequently, we measure the fracture energy for a bi-crystal of silicon carbide, diffusion bonded with a thin glassy layer. Nature Publishing Group UK 2017-07-24 /pmc/articles/PMC5524636/ /pubmed/28740188 http://dx.doi.org/10.1038/s41467-017-00139-w Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Sernicola, Giorgio Giovannini, Tommaso Patel, Punit Kermode, James R. Balint, Daniel S. Britton, T. Ben Giuliani, Finn In situ stable crack growth at the micron scale |
title | In situ stable crack growth at the micron scale |
title_full | In situ stable crack growth at the micron scale |
title_fullStr | In situ stable crack growth at the micron scale |
title_full_unstemmed | In situ stable crack growth at the micron scale |
title_short | In situ stable crack growth at the micron scale |
title_sort | in situ stable crack growth at the micron scale |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5524636/ https://www.ncbi.nlm.nih.gov/pubmed/28740188 http://dx.doi.org/10.1038/s41467-017-00139-w |
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