Promoting core/surface homogeneity during flash sintering of 3YSZ ceramic by current path management: experimental and modelling studies
文献类型：期刊论文
| 作者 | Li, Yinsheng; Torchio, Riccardo; Falco, Simone; Alotto, Piergiorgio; Huang, Zhengren; Todd, Richard, I |
| 刊名 | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
 |
| 出版日期 | 2021 |
| 卷号 | 41期号:13页码:6649-6659 |
| 关键词 | THERMAL RUNAWAY GRAIN-GROWTH TEMPERATURE SIMULATION ZIRCONIA MICROSTRUCTURE DENSIFICATION CONDUCTIVITY SAMPLE |
| 英文摘要 | During flash sintering (FS) of ceramics, the heat loss by surface radiation is the main cause of temperature gradient between core and surface, which induces inhomogeneity in microstructure. To solve this problem, the judicious designing of sample geometry and electrodes configuration is proposed. Experimental and simulation results show that the application of dogbone shape, forked electrodes, and lower cross-section aspect ratio effectively shifts the current path in 3YSZ samples from core to near-surface during FS, compared to bar-shape samples with a single electrode at each end. Consequently, the temperature distribution becomes more uniform throughout the 3YSZ sample, resulting in increase in relative density from 92.7 % to 99.7 % and improved core/ surface homogeneity in microstructure. These optimizations enable 3YSZ ceramics to obtain significant increase in flexural strength from 1203 +/- 17 MPa to 1501 +/- 15 MPa. A multiphysics model is implemented and compared with experimental results, which reveals the underlying mechanisms of improved sample homogeneity. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21442]  |
| 专题 | 2021专题_期刊论文 |
| 作者单位 | 1.Li, YS (corresponding author), Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England. 2.Falco, S (corresponding author), Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England. 3.Torchio, R (corresponding author), Univ Padua, Dept Ind Engn, I-35135 Padua, Italy. |
| 推荐引用方式 GB/T 7714 | Li, Yinsheng,Torchio, Riccardo,Falco, Simone,et al. Promoting core/surface homogeneity during flash sintering of 3YSZ ceramic by current path management: experimental and modelling studies[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2021,41(13):6649-6659. |
| APA | Li, Yinsheng,Torchio, Riccardo,Falco, Simone,Alotto, Piergiorgio,Huang, Zhengren,&Todd, Richard, I.(2021).Promoting core/surface homogeneity during flash sintering of 3YSZ ceramic by current path management: experimental and modelling studies.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,41(13),6649-6659. |
| MLA | Li, Yinsheng,et al."Promoting core/surface homogeneity during flash sintering of 3YSZ ceramic by current path management: experimental and modelling studies".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 41.13(2021):6649-6659. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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