Superelasticity in micro-scale shape memory ceramic particles
Shape memory ceramics that exhibit repeatable superelastic deformation are of considerable significance for possible energy damping and micro-actuation applications, and the present work aims to further establish the structural conditions required to avoid fracture in these brittle materials. Spray...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en_US |
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Elsevier
2018
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| Online Access: | http://hdl.handle.net/1721.1/113210 https://orcid.org/0000-0001-9856-2682 |
| _version_ | 1826194044799156224 |
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| author | Du, Zehui Zeng, Xiao Mei Liu, Qing Gan, Chee Lip Schuh, Christopher A |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Du, Zehui Zeng, Xiao Mei Liu, Qing Gan, Chee Lip Schuh, Christopher A |
| author_sort | Du, Zehui |
| collection | MIT |
| description | Shape memory ceramics that exhibit repeatable superelastic deformation are of considerable significance for possible energy damping and micro-actuation applications, and the present work aims to further establish the structural conditions required to avoid fracture in these brittle materials. Spray dried micro-scale superelastic ceramic particles with a variety of grain structures were produced, ranging from single crystal to oligocrystal to polycrystalline particles. Micro-compression experiments showed that whereas polycrystalline samples fracture upon loading, oligocrystal and single crystal particles can exhibit cyclic superelasticity, the latter particles achieving highly reproducible superelasticity to over one hundred cycles with particle compressions up to 3.8% and dissipated energy up to 20–40 MJ/m³ per cycle. The mechanisms of structural evolution and fatigue during cyclic loading are also explored. Keywords
ZrO₂
Superelasticity
Cycling
Fatigue
Shape memory ceramics |
| first_indexed | 2024-09-23T09:49:37Z |
| format | Article |
| id | mit-1721.1/113210 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:49:37Z |
| publishDate | 2018 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1132102022-09-26T13:58:41Z Superelasticity in micro-scale shape memory ceramic particles Du, Zehui Zeng, Xiao Mei Liu, Qing Gan, Chee Lip Schuh, Christopher A Massachusetts Institute of Technology. Department of Materials Science and Engineering Schuh, Christopher A. Schuh, Christopher A Shape memory ceramics that exhibit repeatable superelastic deformation are of considerable significance for possible energy damping and micro-actuation applications, and the present work aims to further establish the structural conditions required to avoid fracture in these brittle materials. Spray dried micro-scale superelastic ceramic particles with a variety of grain structures were produced, ranging from single crystal to oligocrystal to polycrystalline particles. Micro-compression experiments showed that whereas polycrystalline samples fracture upon loading, oligocrystal and single crystal particles can exhibit cyclic superelasticity, the latter particles achieving highly reproducible superelasticity to over one hundred cycles with particle compressions up to 3.8% and dissipated energy up to 20–40 MJ/m³ per cycle. The mechanisms of structural evolution and fatigue during cyclic loading are also explored. Keywords ZrO₂ Superelasticity Cycling Fatigue Shape memory ceramics 2018-01-16T18:58:27Z 2018-01-16T18:58:27Z 2016-10 2016-10 Article http://purl.org/eprint/type/JournalArticle 1359-6454 1873-2453 http://hdl.handle.net/1721.1/113210 Du, Zehui, Xiao Mei Zeng, Qing Liu, Christopher A. Schuh, and Chee Lip Gan. “Superelasticity in Micro-Scale Shape Memory Ceramic Particles.” Acta Materialia 123 (January 2017): 255–263 © 2016 Acta Materialia Inc https://orcid.org/0000-0001-9856-2682 en_US https://doi.org/10.1016/j.actamat.2016.10.047 Acta Materialia Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Schuh via Erja Kajosalo |
| spellingShingle | Du, Zehui Zeng, Xiao Mei Liu, Qing Gan, Chee Lip Schuh, Christopher A Superelasticity in micro-scale shape memory ceramic particles |
| title | Superelasticity in micro-scale shape memory ceramic particles |
| title_full | Superelasticity in micro-scale shape memory ceramic particles |
| title_fullStr | Superelasticity in micro-scale shape memory ceramic particles |
| title_full_unstemmed | Superelasticity in micro-scale shape memory ceramic particles |
| title_short | Superelasticity in micro-scale shape memory ceramic particles |
| title_sort | superelasticity in micro scale shape memory ceramic particles |
| url | http://hdl.handle.net/1721.1/113210 https://orcid.org/0000-0001-9856-2682 |
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