Effect of CeO2-Y2O3 sintering aids on the microstructure and properties of corundum-based composite ceramics
| Autor: | Yuhang Du, Chenxi Song, Yulin Wei, Deli Ma, Baocai Pan, Mengyong Sun, Guopu Shi, Zhi Wang, Qinggang Li |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of Asian Ceramic Societies, Vol 11, Iss 4, Pp 517-525 (2023) |
| Druh dokumentu: | article |
| ISSN: | 21870764 2187-0764 |
| DOI: | 10.1080/21870764.2023.2264608 |
| Popis: | ABSTRACTReducing the preparation cost of alumina ceramics has received significant attention, as alumina is one of the most widely used structural ceramics. In this study, corundum-based composite ceramics with a white corundum-to-zircon powder mass ratio of 7:3 were selected as the matrix. CeO2 and Y2O3 doped corundum-based composite ceramics were prepared via pressureless sintering. The total content of CeO2-Y2O3 was set at 10 wt% to study the effects of different temperatures and CeO2-Y2O3 ratios on the properties of the corundum-based composite ceramics. Physical phase and microstructural analyses of the corundum-based composite ceramics were performed using X-ray diffraction and scanning electron microscopy, respectively. The results showed that the sintering temperature of the corundum-based composite ceramics could be effectively reduced by using a solid solution of CeO2 and Y2O3. The best sintering temperature was 1400°C, and the best composition was 5 wt% CeO2-5 wt% Y2O3. The physical properties of the corundum-based composite ceramics prepared under these technological conditions include a flexural strength of 386.2 MPa, hardness of 13.5 GPa, density of 3.9128 g/cm3, linear shrinkage of 16.31% and an apparent porosity of 0.62%. |
| Databáze: | Directory of Open Access Journals |
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