The Influence of the Microstructure of Ceramic-Elastomer Composites on Their Energy Absorption Capability
The paper presents the experimental results of static and dynamic compressive tests conducted on ceramic-elastomer composites. The alumina ceramic preforms were fabricated by the four-step method: ceramic mixture preparation, consolidation under pressure, presintering, and sintering under pressure,...
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MDPI AG
2021-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/21/6618 |
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| author | Paulina Kozera Anna Boczkowska Rafał Kozera Marcin Małek Włodzimierz Idczak |
| author_facet | Paulina Kozera Anna Boczkowska Rafał Kozera Marcin Małek Włodzimierz Idczak |
| author_sort | Paulina Kozera |
| collection | DOAJ |
| description | The paper presents the experimental results of static and dynamic compressive tests conducted on ceramic-elastomer composites. The alumina ceramic preforms were fabricated by the four-step method: ceramic mixture preparation, consolidation under pressure, presintering, and sintering under pressure, respectively. To obtain ceramic preforms with a similar volume fraction of open pores, but with different pore sizes, alumina powder with different particle size and a ceramic binder were used, as well as pore-forming agents that were evenly distributed throughout the volume of the molding mass. The composites were obtained using vacuum pressure infiltration of porous alumina ceramic by urea-urethane elastomer in liquid form. As a result, the obtained composites were characterized by two phases that interpenetrated three-dimensionally and topologically throughout the microstructure. The microstructure of the ceramic preforms was revealed by X-ray tomography, which indicated that the alumina preforms had similar porosity of approximately 40% vol. but different pore diameter in the range of 6 to 34 µm. After composite fabrication, image analysis was carried out. Due to the microstructure of the ceramic preforms, the composites differed in the specific surface fraction of the interphase boundaries (S<sub>v</sub>). The highest value of the S<sub>v</sub> parameter was achieved for composite fabricated by infiltration method of using ceramic preform with the smallest pore size. Static and dynamic tests were carried out using different strain rate: 1.4·10<sup>−3</sup>, 7·10<sup>−2</sup>, 1.4·10<sup>−1</sup>, and 3·10<sup>3</sup> s<sup>−1</sup>. Compressive strength, stress at plateau zone, and absorbed energy were determined. It was found that the ceramic-elastomer composites’ ability to absorb energy depended on the specific surface fraction of the interphase boundaries and achieved a value between 15.3 MJ/m<sup>3</sup> in static test and 51.1 MJ/m<sup>3</sup> for dynamic strain rate. |
| first_indexed | 2024-03-10T05:58:03Z |
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| id | doaj.art-b3831ec0b2ed4685b27edf511dffa71f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:58:03Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-b3831ec0b2ed4685b27edf511dffa71f2023-11-22T21:14:54ZengMDPI AGMaterials1996-19442021-11-011421661810.3390/ma14216618The Influence of the Microstructure of Ceramic-Elastomer Composites on Their Energy Absorption CapabilityPaulina Kozera0Anna Boczkowska1Rafał Kozera2Marcin Małek3Włodzimierz Idczak4Faculty of Materials Science and Engineering, Warsaw University of Technology, ul. Woloska 141, 02-507 Warsaw, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, ul. Woloska 141, 02-507 Warsaw, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, ul. Woloska 141, 02-507 Warsaw, PolandFaculty of Civil Engineering and Geodesy, Military University of Technology, ul. Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, PolandFaculty of Civil Engineering and Geodesy, Military University of Technology, ul. Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, PolandThe paper presents the experimental results of static and dynamic compressive tests conducted on ceramic-elastomer composites. The alumina ceramic preforms were fabricated by the four-step method: ceramic mixture preparation, consolidation under pressure, presintering, and sintering under pressure, respectively. To obtain ceramic preforms with a similar volume fraction of open pores, but with different pore sizes, alumina powder with different particle size and a ceramic binder were used, as well as pore-forming agents that were evenly distributed throughout the volume of the molding mass. The composites were obtained using vacuum pressure infiltration of porous alumina ceramic by urea-urethane elastomer in liquid form. As a result, the obtained composites were characterized by two phases that interpenetrated three-dimensionally and topologically throughout the microstructure. The microstructure of the ceramic preforms was revealed by X-ray tomography, which indicated that the alumina preforms had similar porosity of approximately 40% vol. but different pore diameter in the range of 6 to 34 µm. After composite fabrication, image analysis was carried out. Due to the microstructure of the ceramic preforms, the composites differed in the specific surface fraction of the interphase boundaries (S<sub>v</sub>). The highest value of the S<sub>v</sub> parameter was achieved for composite fabricated by infiltration method of using ceramic preform with the smallest pore size. Static and dynamic tests were carried out using different strain rate: 1.4·10<sup>−3</sup>, 7·10<sup>−2</sup>, 1.4·10<sup>−1</sup>, and 3·10<sup>3</sup> s<sup>−1</sup>. Compressive strength, stress at plateau zone, and absorbed energy were determined. It was found that the ceramic-elastomer composites’ ability to absorb energy depended on the specific surface fraction of the interphase boundaries and achieved a value between 15.3 MJ/m<sup>3</sup> in static test and 51.1 MJ/m<sup>3</sup> for dynamic strain rate.https://www.mdpi.com/1996-1944/14/21/6618interpenetrating phase compositesceramic preformstatic and dynamic testsspecific surface fraction of the interphase boundariesenergy absorption capabilitystrain rate |
| spellingShingle | Paulina Kozera Anna Boczkowska Rafał Kozera Marcin Małek Włodzimierz Idczak The Influence of the Microstructure of Ceramic-Elastomer Composites on Their Energy Absorption Capability Materials interpenetrating phase composites ceramic preform static and dynamic tests specific surface fraction of the interphase boundaries energy absorption capability strain rate |
| title | The Influence of the Microstructure of Ceramic-Elastomer Composites on Their Energy Absorption Capability |
| title_full | The Influence of the Microstructure of Ceramic-Elastomer Composites on Their Energy Absorption Capability |
| title_fullStr | The Influence of the Microstructure of Ceramic-Elastomer Composites on Their Energy Absorption Capability |
| title_full_unstemmed | The Influence of the Microstructure of Ceramic-Elastomer Composites on Their Energy Absorption Capability |
| title_short | The Influence of the Microstructure of Ceramic-Elastomer Composites on Their Energy Absorption Capability |
| title_sort | influence of the microstructure of ceramic elastomer composites on their energy absorption capability |
| topic | interpenetrating phase composites ceramic preform static and dynamic tests specific surface fraction of the interphase boundaries energy absorption capability strain rate |
| url | https://www.mdpi.com/1996-1944/14/21/6618 |
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