Cargando…
Large increase in fracture resistance of stishovite with crack extension less than one micrometer
The development of strong, tough, and damage-tolerant ceramics requires nano/microstructure design to utilize toughening mechanisms operating at different length scales. The toughening mechanisms so far known are effective in micro-scale, then, they require the crack extension of more than a few mic...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4458880/ https://www.ncbi.nlm.nih.gov/pubmed/26051871 http://dx.doi.org/10.1038/srep10993 |
_version_ | 1782375127385636864 |
---|---|
author | Yoshida, Kimiko Wakai, Fumihiro Nishiyama, Norimasa Sekine, Risako Shinoda, Yutaka Akatsu, Takashi Nagoshi, Takashi Sone, Masato |
author_facet | Yoshida, Kimiko Wakai, Fumihiro Nishiyama, Norimasa Sekine, Risako Shinoda, Yutaka Akatsu, Takashi Nagoshi, Takashi Sone, Masato |
author_sort | Yoshida, Kimiko |
collection | PubMed |
description | The development of strong, tough, and damage-tolerant ceramics requires nano/microstructure design to utilize toughening mechanisms operating at different length scales. The toughening mechanisms so far known are effective in micro-scale, then, they require the crack extension of more than a few micrometers to increase the fracture resistance. Here, we developed a micro-mechanical test method using micro-cantilever beam specimens to determine the very early part of resistance-curve of nanocrystalline SiO(2) stishovite, which exhibited fracture-induced amorphization. We revealed that this novel toughening mechanism was effective even at length scale of nanometer due to narrow transformation zone width of a few tens of nanometers and large dilatational strain (from 60 to 95%) associated with the transition of crystal to amorphous state. This testing method will be a powerful tool to search for toughening mechanisms that may operate at nanoscale for attaining both reliability and strength of structural materials. |
format | Online Article Text |
id | pubmed-4458880 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-44588802015-06-17 Large increase in fracture resistance of stishovite with crack extension less than one micrometer Yoshida, Kimiko Wakai, Fumihiro Nishiyama, Norimasa Sekine, Risako Shinoda, Yutaka Akatsu, Takashi Nagoshi, Takashi Sone, Masato Sci Rep Article The development of strong, tough, and damage-tolerant ceramics requires nano/microstructure design to utilize toughening mechanisms operating at different length scales. The toughening mechanisms so far known are effective in micro-scale, then, they require the crack extension of more than a few micrometers to increase the fracture resistance. Here, we developed a micro-mechanical test method using micro-cantilever beam specimens to determine the very early part of resistance-curve of nanocrystalline SiO(2) stishovite, which exhibited fracture-induced amorphization. We revealed that this novel toughening mechanism was effective even at length scale of nanometer due to narrow transformation zone width of a few tens of nanometers and large dilatational strain (from 60 to 95%) associated with the transition of crystal to amorphous state. This testing method will be a powerful tool to search for toughening mechanisms that may operate at nanoscale for attaining both reliability and strength of structural materials. Nature Publishing Group 2015-06-08 /pmc/articles/PMC4458880/ /pubmed/26051871 http://dx.doi.org/10.1038/srep10993 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Yoshida, Kimiko Wakai, Fumihiro Nishiyama, Norimasa Sekine, Risako Shinoda, Yutaka Akatsu, Takashi Nagoshi, Takashi Sone, Masato Large increase in fracture resistance of stishovite with crack extension less than one micrometer |
title | Large increase in fracture resistance of stishovite with crack extension less than one micrometer |
title_full | Large increase in fracture resistance of stishovite with crack extension less than one micrometer |
title_fullStr | Large increase in fracture resistance of stishovite with crack extension less than one micrometer |
title_full_unstemmed | Large increase in fracture resistance of stishovite with crack extension less than one micrometer |
title_short | Large increase in fracture resistance of stishovite with crack extension less than one micrometer |
title_sort | large increase in fracture resistance of stishovite with crack extension less than one micrometer |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4458880/ https://www.ncbi.nlm.nih.gov/pubmed/26051871 http://dx.doi.org/10.1038/srep10993 |
work_keys_str_mv | AT yoshidakimiko largeincreaseinfractureresistanceofstishovitewithcrackextensionlessthanonemicrometer AT wakaifumihiro largeincreaseinfractureresistanceofstishovitewithcrackextensionlessthanonemicrometer AT nishiyamanorimasa largeincreaseinfractureresistanceofstishovitewithcrackextensionlessthanonemicrometer AT sekinerisako largeincreaseinfractureresistanceofstishovitewithcrackextensionlessthanonemicrometer AT shinodayutaka largeincreaseinfractureresistanceofstishovitewithcrackextensionlessthanonemicrometer AT akatsutakashi largeincreaseinfractureresistanceofstishovitewithcrackextensionlessthanonemicrometer AT nagoshitakashi largeincreaseinfractureresistanceofstishovitewithcrackextensionlessthanonemicrometer AT sonemasato largeincreaseinfractureresistanceofstishovitewithcrackextensionlessthanonemicrometer |