Pore Architectures and Mechanical Properties of Porous α-SiAlON Ceramics Fabricated via Unidirectional Freeze Casting Based on Camphene-Templating
Porous α-SiAlON ceramics were fabricated using the camphene-based unidirectional freeze casting method, in which a gradient porous structure was formed as a result of the decreased solidification velocity in the freezing direction. Microstructure, porosity and pore size distribution of diff...
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MDPI AG
2019-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/12/5/687 |
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doaj-b459fd7ebe8c48ef90902ee62445b0be2020-11-24T23:31:15ZengMDPI AGMaterials1996-19442019-02-0112568710.3390/ma12050687ma12050687Pore Architectures and Mechanical Properties of Porous α-SiAlON Ceramics Fabricated via Unidirectional Freeze Casting Based on Camphene-TemplatingZhaoping Hou0Feng Ye1Qiang Liu2Limeng Liu3Haiwei Jiang4Shaowei Zhang5College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, ChinaSchool of Materials Science and Engineering, North Minzu University, Yinchuan 750021, ChinaCollege of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UKPorous α-SiAlON ceramics were fabricated using the camphene-based unidirectional freeze casting method, in which a gradient porous structure was formed as a result of the decreased solidification velocity in the freezing direction. Microstructure, porosity and pore size distribution of different parts of as-prepared samples were examined and compared, and correlated with their mechanical properties. For a given solid loading, the overall pore size and porosity of the top part were greater than those of the bottom part. Interestingly, despite its higher porosity, the flexural strength and fracture toughness of the top part were both higher than those of the bottom part, suggesting that apart from porosity, pore morphology and size affected mechanical properties of as-prepared porous α-SiAlON ceramics.https://www.mdpi.com/1996-1944/12/5/687camphene-templated porous α-SiAlONporositypore sizemechanical properties |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Zhaoping Hou Feng Ye Qiang Liu Limeng Liu Haiwei Jiang Shaowei Zhang |
| spellingShingle |
Zhaoping Hou Feng Ye Qiang Liu Limeng Liu Haiwei Jiang Shaowei Zhang Pore Architectures and Mechanical Properties of Porous α-SiAlON Ceramics Fabricated via Unidirectional Freeze Casting Based on Camphene-Templating Materials camphene-templated porous α-SiAlON porosity pore size mechanical properties |
| author_facet |
Zhaoping Hou Feng Ye Qiang Liu Limeng Liu Haiwei Jiang Shaowei Zhang |
| author_sort |
Zhaoping Hou |
| title |
Pore Architectures and Mechanical Properties of Porous α-SiAlON Ceramics Fabricated via Unidirectional Freeze Casting Based on Camphene-Templating |
| title_short |
Pore Architectures and Mechanical Properties of Porous α-SiAlON Ceramics Fabricated via Unidirectional Freeze Casting Based on Camphene-Templating |
| title_full |
Pore Architectures and Mechanical Properties of Porous α-SiAlON Ceramics Fabricated via Unidirectional Freeze Casting Based on Camphene-Templating |
| title_fullStr |
Pore Architectures and Mechanical Properties of Porous α-SiAlON Ceramics Fabricated via Unidirectional Freeze Casting Based on Camphene-Templating |
| title_full_unstemmed |
Pore Architectures and Mechanical Properties of Porous α-SiAlON Ceramics Fabricated via Unidirectional Freeze Casting Based on Camphene-Templating |
| title_sort |
pore architectures and mechanical properties of porous α-sialon ceramics fabricated via unidirectional freeze casting based on camphene-templating |
| publisher |
MDPI AG |
| series |
Materials |
| issn |
1996-1944 |
| publishDate |
2019-02-01 |
| description |
Porous α-SiAlON ceramics were fabricated using the camphene-based unidirectional freeze casting method, in which a gradient porous structure was formed as a result of the decreased solidification velocity in the freezing direction. Microstructure, porosity and pore size distribution of different parts of as-prepared samples were examined and compared, and correlated with their mechanical properties. For a given solid loading, the overall pore size and porosity of the top part were greater than those of the bottom part. Interestingly, despite its higher porosity, the flexural strength and fracture toughness of the top part were both higher than those of the bottom part, suggesting that apart from porosity, pore morphology and size affected mechanical properties of as-prepared porous α-SiAlON ceramics. |
| topic |
camphene-templated porous α-SiAlON porosity pore size mechanical properties |
| url |
https://www.mdpi.com/1996-1944/12/5/687 |
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