Self-healing by design: universal kinetic model of strength recovery in self-healing ceramics
We propose a new theoretical kinetic model of strength recovery by oxidation-induced self-healing of surface cracks in composites containing a healing agent (HA). The kinetics is a key parameter in the design of structural components that can self-heal the damage done in service. Based on three-dime...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2020-01-01
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| Series: | Science and Technology of Advanced Materials |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/14686996.2020.1796468 |
| _version_ | 1818754735066316800 |
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| author | Toshio Osada Toru Hara Masanori Mitome Shingo Ozaki Taichi Abe Kiichi Kamoda Takahito Ohmura |
| author_facet | Toshio Osada Toru Hara Masanori Mitome Shingo Ozaki Taichi Abe Kiichi Kamoda Takahito Ohmura |
| author_sort | Toshio Osada |
| collection | DOAJ |
| description | We propose a new theoretical kinetic model of strength recovery by oxidation-induced self-healing of surface cracks in composites containing a healing agent (HA). The kinetics is a key parameter in the design of structural components that can self-heal the damage done in service. Based on three-dimensional (3D) observations of crack-gap filling, two crack-gap filling models, i.e., a bridging model and a tip-to-mouth filling model, are incorporated in the proposed kinetic model. These crack-gap filling models account for the microstructural features of the fracture surfaces, crack geometry, and oxidation kinetics of the healing-agent. Hence, the minimum and maximum remaining flaw sizes in the healed crack gaps are estimated for various healing temperatures, times, and oxygen partial pressure conditions. Further, the nonlinear elastic fracture mechanics suitable for small-sized remaining flaws, together with a statistical analysis of the original Weibull-type strength distribution, enables the prediction of upper and lower strength limits of the healed composites. Three sintered alumina matrix composites containing silicon carbide (SiC)-type HAs with various volume fractions and shapes, together with monolithic SiC ceramics, are considered. The strength of the healed-composite predicted by our model agrees well with the experimental values. This theoretical approach can be applied to HAs other than SiC and enables the design of self-healing ceramic components for various applications. |
| first_indexed | 2024-12-18T05:27:58Z |
| format | Article |
| id | doaj.art-a5ad695062124fba9fb23713dfc418db |
| institution | Directory Open Access Journal |
| issn | 1468-6996 1878-5514 |
| language | English |
| last_indexed | 2024-12-18T05:27:58Z |
| publishDate | 2020-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials |
| spelling | doaj.art-a5ad695062124fba9fb23713dfc418db2022-12-21T21:19:30ZengTaylor & Francis GroupScience and Technology of Advanced Materials1468-69961878-55142020-01-0121159360810.1080/14686996.2020.17964681796468Self-healing by design: universal kinetic model of strength recovery in self-healing ceramicsToshio Osada0Toru Hara1Masanori Mitome2Shingo Ozaki3Taichi Abe4Kiichi Kamoda5Takahito Ohmura6National Institute for Materials ScienceNational Institute for Materials ScienceNational Institute for Materials ScienceYokohama National UniversityNational Institute for Materials ScienceNational Institute for Materials ScienceNational Institute for Materials ScienceWe propose a new theoretical kinetic model of strength recovery by oxidation-induced self-healing of surface cracks in composites containing a healing agent (HA). The kinetics is a key parameter in the design of structural components that can self-heal the damage done in service. Based on three-dimensional (3D) observations of crack-gap filling, two crack-gap filling models, i.e., a bridging model and a tip-to-mouth filling model, are incorporated in the proposed kinetic model. These crack-gap filling models account for the microstructural features of the fracture surfaces, crack geometry, and oxidation kinetics of the healing-agent. Hence, the minimum and maximum remaining flaw sizes in the healed crack gaps are estimated for various healing temperatures, times, and oxygen partial pressure conditions. Further, the nonlinear elastic fracture mechanics suitable for small-sized remaining flaws, together with a statistical analysis of the original Weibull-type strength distribution, enables the prediction of upper and lower strength limits of the healed composites. Three sintered alumina matrix composites containing silicon carbide (SiC)-type HAs with various volume fractions and shapes, together with monolithic SiC ceramics, are considered. The strength of the healed-composite predicted by our model agrees well with the experimental values. This theoretical approach can be applied to HAs other than SiC and enables the design of self-healing ceramic components for various applications.http://dx.doi.org/10.1080/14686996.2020.1796468kineticsstrengthself-healingsurface cracksceramics |
| spellingShingle | Toshio Osada Toru Hara Masanori Mitome Shingo Ozaki Taichi Abe Kiichi Kamoda Takahito Ohmura Self-healing by design: universal kinetic model of strength recovery in self-healing ceramics Science and Technology of Advanced Materials kinetics strength self-healing surface cracks ceramics |
| title | Self-healing by design: universal kinetic model of strength recovery in self-healing ceramics |
| title_full | Self-healing by design: universal kinetic model of strength recovery in self-healing ceramics |
| title_fullStr | Self-healing by design: universal kinetic model of strength recovery in self-healing ceramics |
| title_full_unstemmed | Self-healing by design: universal kinetic model of strength recovery in self-healing ceramics |
| title_short | Self-healing by design: universal kinetic model of strength recovery in self-healing ceramics |
| title_sort | self healing by design universal kinetic model of strength recovery in self healing ceramics |
| topic | kinetics strength self-healing surface cracks ceramics |
| url | http://dx.doi.org/10.1080/14686996.2020.1796468 |
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