Grain Growth Behavior of Alumina in Zirconia-Toughened Alumina (ZTA) Ceramics During Pressureless Sintering
The primary grain size, sintering conditions, and admixtures have a significant impact on the grain growth of alumina ceramics. Three kinds of alumina powders with varying grain sizes and zirconia nanoparticles were selected and configured into five compositions of zirconia-toughened alumina (ZTA) c...
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2025-01-01
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| author | Yi Zhao Jiang Deng Wen Li Jianhong Liu Wenjie Yuan |
| author_facet | Yi Zhao Jiang Deng Wen Li Jianhong Liu Wenjie Yuan |
| author_sort | Yi Zhao |
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| description | The primary grain size, sintering conditions, and admixtures have a significant impact on the grain growth of alumina ceramics. Three kinds of alumina powders with varying grain sizes and zirconia nanoparticles were selected and configured into five compositions of zirconia-toughened alumina (ZTA) ceramics. As-received granules were used to sinter bulk ceramics at temperatures of 1520 °C, 1600 °C, and 1680 °C for durations of 0.5–2 h, respectively. The average grain sizes of alumina in ZTA ceramics were studied as a function of the sintering temperature, time, and particle size of raw materials. The results demonstrated that the addition of nano alumina led to a slight reduction in the grain size of alumina and a more uniform grain size distribution. The incorporation of nano zirconia (15 wt.%) resulted in the concentration of zirconia among the alumina grains, effectively inhibiting grain growth and resulting in a significant reduction in the average grain size of alumina from 11.73 to 5.63 μm after sintering at 1600 °C for 1 h. |
| format | Article |
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| institution | Kabale University |
| issn | 2073-4352 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj-art-53d183b8290a43dbbf0363b4dc2fa4c82025-01-24T13:28:16ZengMDPI AGCrystals2073-43522025-01-011518910.3390/cryst15010089Grain Growth Behavior of Alumina in Zirconia-Toughened Alumina (ZTA) Ceramics During Pressureless SinteringYi Zhao0Jiang Deng1Wen Li2Jianhong Liu3Wenjie Yuan4State Key Laboratory of Advanced Refractories, Wuhan University of Science and Technology, Wuhan 430081, ChinaState Key Laboratory of Advanced Refractories, Wuhan University of Science and Technology, Wuhan 430081, ChinaHubei Smile New Materials Co., Ltd., Huanggang 438400, ChinaHubei Smile New Materials Co., Ltd., Huanggang 438400, ChinaState Key Laboratory of Advanced Refractories, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe primary grain size, sintering conditions, and admixtures have a significant impact on the grain growth of alumina ceramics. Three kinds of alumina powders with varying grain sizes and zirconia nanoparticles were selected and configured into five compositions of zirconia-toughened alumina (ZTA) ceramics. As-received granules were used to sinter bulk ceramics at temperatures of 1520 °C, 1600 °C, and 1680 °C for durations of 0.5–2 h, respectively. The average grain sizes of alumina in ZTA ceramics were studied as a function of the sintering temperature, time, and particle size of raw materials. The results demonstrated that the addition of nano alumina led to a slight reduction in the grain size of alumina and a more uniform grain size distribution. The incorporation of nano zirconia (15 wt.%) resulted in the concentration of zirconia among the alumina grains, effectively inhibiting grain growth and resulting in a significant reduction in the average grain size of alumina from 11.73 to 5.63 μm after sintering at 1600 °C for 1 h.https://www.mdpi.com/2073-4352/15/1/89ZTA ceramicsgrain sizegrain size distributionsintering temperatureholding time |
| spellingShingle | Yi Zhao Jiang Deng Wen Li Jianhong Liu Wenjie Yuan Grain Growth Behavior of Alumina in Zirconia-Toughened Alumina (ZTA) Ceramics During Pressureless Sintering Crystals ZTA ceramics grain size grain size distribution sintering temperature holding time |
| title | Grain Growth Behavior of Alumina in Zirconia-Toughened Alumina (ZTA) Ceramics During Pressureless Sintering |
| title_full | Grain Growth Behavior of Alumina in Zirconia-Toughened Alumina (ZTA) Ceramics During Pressureless Sintering |
| title_fullStr | Grain Growth Behavior of Alumina in Zirconia-Toughened Alumina (ZTA) Ceramics During Pressureless Sintering |
| title_full_unstemmed | Grain Growth Behavior of Alumina in Zirconia-Toughened Alumina (ZTA) Ceramics During Pressureless Sintering |
| title_short | Grain Growth Behavior of Alumina in Zirconia-Toughened Alumina (ZTA) Ceramics During Pressureless Sintering |
| title_sort | grain growth behavior of alumina in zirconia toughened alumina zta ceramics during pressureless sintering |
| topic | ZTA ceramics grain size grain size distribution sintering temperature holding time |
| url | https://www.mdpi.com/2073-4352/15/1/89 |
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