Characterization of in-situ zirconia/mullite composites prepared by sol-gel technique
The main objective of this study was to investigate the role of zirconia addition to mullite through an in-situ reaction aimed at improving both the mechanical properties and the sinterability behavior. In this work, mullite–zirconia composites were produced using a sol-gel technique. Different amou...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2021-07-01
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| Series: | Journal of Asian Ceramic Societies |
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| Online Access: | http://dx.doi.org/10.1080/21870764.2021.1929738 |
| _version_ | 1818887390200070144 |
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| author | Abdu. I. Abdallah M. Sayed M. Awaad Adam H. E. Yousif S.M. Naga |
| author_facet | Abdu. I. Abdallah M. Sayed M. Awaad Adam H. E. Yousif S.M. Naga |
| author_sort | Abdu. I. Abdallah |
| collection | DOAJ |
| description | The main objective of this study was to investigate the role of zirconia addition to mullite through an in-situ reaction aimed at improving both the mechanical properties and the sinterability behavior. In this work, mullite–zirconia composites were produced using a sol-gel technique. Different amounts of zirconia (0, 10, 15, and 20 wt.%) were added to the mullite, and the calcined gels were sintered at 1550–1700°C for 1 h. The apparent porosity and bulk density of the blank and zirconia/mullite composites were estimated in accordance with ASTM C-20. The phase composition and sample morphology were evaluated via X-ray diffraction (XRD) and scanning electron microscopy analysis (SEM), respectively. Furthermore, the mechanical properties and thermal expansion coefficient (TEC) were also evaluated. The results revealed that the apparent porosity decreased and the density of the zirconia/mullite composites increased when the sintering temperature was increased from 1550 to 1700°C. However, the mechanical properties improved with increasing zirconia content and MZ20 sintered at 1700°C exhibited the maximum bending strength. The TEC results reflected the influence of the composition on the sample TEC. Samples with higher ZrO2 content yielded higher TEC figures than those with lower content. |
| first_indexed | 2024-12-19T16:36:28Z |
| format | Article |
| id | doaj.art-5a48a008d39b4ba1a3578e245f42ce8b |
| institution | Directory Open Access Journal |
| issn | 2187-0764 |
| language | English |
| last_indexed | 2024-12-19T16:36:28Z |
| publishDate | 2021-07-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Asian Ceramic Societies |
| spelling | doaj.art-5a48a008d39b4ba1a3578e245f42ce8b2022-12-21T20:13:56ZengTaylor & Francis GroupJournal of Asian Ceramic Societies2187-07642021-07-019394094610.1080/21870764.2021.19297381929738Characterization of in-situ zirconia/mullite composites prepared by sol-gel techniqueAbdu. I. Abdallah0M. Sayed1M. Awaad2Adam H. E. Yousif3S.M. Naga4Alfashir UnivNational Research CentreNational Research CentreAlfashir UnivNational Research CentreThe main objective of this study was to investigate the role of zirconia addition to mullite through an in-situ reaction aimed at improving both the mechanical properties and the sinterability behavior. In this work, mullite–zirconia composites were produced using a sol-gel technique. Different amounts of zirconia (0, 10, 15, and 20 wt.%) were added to the mullite, and the calcined gels were sintered at 1550–1700°C for 1 h. The apparent porosity and bulk density of the blank and zirconia/mullite composites were estimated in accordance with ASTM C-20. The phase composition and sample morphology were evaluated via X-ray diffraction (XRD) and scanning electron microscopy analysis (SEM), respectively. Furthermore, the mechanical properties and thermal expansion coefficient (TEC) were also evaluated. The results revealed that the apparent porosity decreased and the density of the zirconia/mullite composites increased when the sintering temperature was increased from 1550 to 1700°C. However, the mechanical properties improved with increasing zirconia content and MZ20 sintered at 1700°C exhibited the maximum bending strength. The TEC results reflected the influence of the composition on the sample TEC. Samples with higher ZrO2 content yielded higher TEC figures than those with lower content.http://dx.doi.org/10.1080/21870764.2021.1929738mullitezirconiasol-gelmechanical propertiesdensification |
| spellingShingle | Abdu. I. Abdallah M. Sayed M. Awaad Adam H. E. Yousif S.M. Naga Characterization of in-situ zirconia/mullite composites prepared by sol-gel technique Journal of Asian Ceramic Societies mullite zirconia sol-gel mechanical properties densification |
| title | Characterization of in-situ zirconia/mullite composites prepared by sol-gel technique |
| title_full | Characterization of in-situ zirconia/mullite composites prepared by sol-gel technique |
| title_fullStr | Characterization of in-situ zirconia/mullite composites prepared by sol-gel technique |
| title_full_unstemmed | Characterization of in-situ zirconia/mullite composites prepared by sol-gel technique |
| title_short | Characterization of in-situ zirconia/mullite composites prepared by sol-gel technique |
| title_sort | characterization of in situ zirconia mullite composites prepared by sol gel technique |
| topic | mullite zirconia sol-gel mechanical properties densification |
| url | http://dx.doi.org/10.1080/21870764.2021.1929738 |
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