Preparation and toughening mechanism of Al2O3 composite ceramic toughened by B4C@TiB2 core–shell units
In this paper, the concept of incorporating core–shell structured units as secondary phases to toughen Al2O3 ceramics is proposed. Al2O3 composite ceramics toughened by B4C@TiB2 core–shell units are successfully synthesized using a combination of molten salt methodology and spark plasma sintering. T...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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Tsinghua University Press Ltd
2023
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/94122 |
| _version_ | 1848765841315725312 |
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| author | Shi, Yingjie Li, Weixing Zhang, Xiaorong Jin, Jiachao Wang, Jilin Dong, Yu Mu, Jingbo Wang, Guangsuo Zhang, Xiaoliang Zhang, Zhixiao |
| author_facet | Shi, Yingjie Li, Weixing Zhang, Xiaorong Jin, Jiachao Wang, Jilin Dong, Yu Mu, Jingbo Wang, Guangsuo Zhang, Xiaoliang Zhang, Zhixiao |
| author_sort | Shi, Yingjie |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this paper, the concept of incorporating core–shell structured units as secondary phases to toughen Al2O3 ceramics is proposed. Al2O3 composite ceramics toughened by B4C@TiB2 core–shell units are successfully synthesized using a combination of molten salt methodology and spark plasma sintering. The synthesis of B4C@TiB2 core–shell toughening units stems from the prior production of core–shell structural B4C@TiB2 powders, and this core–shell structure is effectively preserved within the Al2O3 matrix after sintering. The B4C@TiB2 core–shell toughening unit consists of a micron-sized B4C core enclosed by a shell approximately 500 nm in thickness, composed of numerous nanosized TiB2 grains. The regions surrounding these core–shell units exhibit distinct geometric structures and encompass multidimensional variations in phase composition, grain dimensions, and thermal expansion coefficients. Consequently, intricate stress distributions emerge, fostering the propagation of cracks in multiple dimensions. This behavior consumes a considerable amount of crack propagation energy, thereby enhancing the fracture toughness of the Al2O3 matrix. The resulting Al2O3 composite ceramics display relative density of 99.7%±0.2%, Vickers hardness of 21.5±0.8 GPa, and fracture toughness 6.92±0.22 MPa·m1/2. |
| first_indexed | 2025-11-14T11:41:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-94122 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:41:39Z |
| publishDate | 2023 |
| publisher | Tsinghua University Press Ltd |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-941222024-01-30T07:30:42Z Preparation and toughening mechanism of Al2O3 composite ceramic toughened by B4C@TiB2 core–shell units Shi, Yingjie Li, Weixing Zhang, Xiaorong Jin, Jiachao Wang, Jilin Dong, Yu Mu, Jingbo Wang, Guangsuo Zhang, Xiaoliang Zhang, Zhixiao Al2O3 composite ceramics core–shell structure microstructure design spark plasma sintering toughening mechanism In this paper, the concept of incorporating core–shell structured units as secondary phases to toughen Al2O3 ceramics is proposed. Al2O3 composite ceramics toughened by B4C@TiB2 core–shell units are successfully synthesized using a combination of molten salt methodology and spark plasma sintering. The synthesis of B4C@TiB2 core–shell toughening units stems from the prior production of core–shell structural B4C@TiB2 powders, and this core–shell structure is effectively preserved within the Al2O3 matrix after sintering. The B4C@TiB2 core–shell toughening unit consists of a micron-sized B4C core enclosed by a shell approximately 500 nm in thickness, composed of numerous nanosized TiB2 grains. The regions surrounding these core–shell units exhibit distinct geometric structures and encompass multidimensional variations in phase composition, grain dimensions, and thermal expansion coefficients. Consequently, intricate stress distributions emerge, fostering the propagation of cracks in multiple dimensions. This behavior consumes a considerable amount of crack propagation energy, thereby enhancing the fracture toughness of the Al2O3 matrix. The resulting Al2O3 composite ceramics display relative density of 99.7%±0.2%, Vickers hardness of 21.5±0.8 GPa, and fracture toughness 6.92±0.22 MPa·m1/2. 2023 Journal Article http://hdl.handle.net/20.500.11937/94122 10.26599/JAC.2023.9220826 English http://creativecommons.org/licenses/by/4.0/ Tsinghua University Press Ltd fulltext |
| spellingShingle | Al2O3 composite ceramics core–shell structure microstructure design spark plasma sintering toughening mechanism Shi, Yingjie Li, Weixing Zhang, Xiaorong Jin, Jiachao Wang, Jilin Dong, Yu Mu, Jingbo Wang, Guangsuo Zhang, Xiaoliang Zhang, Zhixiao Preparation and toughening mechanism of Al2O3 composite ceramic toughened by B4C@TiB2 core–shell units |
| title | Preparation and toughening mechanism of Al2O3 composite ceramic toughened by B4C@TiB2 core–shell units |
| title_full | Preparation and toughening mechanism of Al2O3 composite ceramic toughened by B4C@TiB2 core–shell units |
| title_fullStr | Preparation and toughening mechanism of Al2O3 composite ceramic toughened by B4C@TiB2 core–shell units |
| title_full_unstemmed | Preparation and toughening mechanism of Al2O3 composite ceramic toughened by B4C@TiB2 core–shell units |
| title_short | Preparation and toughening mechanism of Al2O3 composite ceramic toughened by B4C@TiB2 core–shell units |
| title_sort | preparation and toughening mechanism of al2o3 composite ceramic toughened by b4c@tib2 core–shell units |
| topic | Al2O3 composite ceramics core–shell structure microstructure design spark plasma sintering toughening mechanism |
| url | http://hdl.handle.net/20.500.11937/94122 |