Effect of in-situ formed Y2O3 by metal hydride reduction reaction on thermal conductivity of beta-Si3N4 ceramics
文献类型：期刊论文
| 作者 | Wang, WD; Yao, DX; Liang, HQ; Xia, YF; Zuo, KH; Yin, JW; Zeng, YP |
| 刊名 | JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
 |
| 出版日期 | 2020-12-01 |
| 期号 | 15页码:5316 |
| ISSN号 | 0955-2219 |
| DOI | 10.1016/j.jeurceramsoc.2020.06.005 |
| 文献子类 | Article |
| 英文摘要 | The effect of YH2 on densification, microstructure, and thermal conductivity of Si3N4 ceramics were investigated by adjusting the amount of YH2 in the range of 0-4 wt% using a two-step sintering method. Native SiO2 was eliminated, and Y2O3 was in situ formed by a metal hydride reduction reaction, resulting in various Y2O3/SiO2 ratios. Full densification of YH2-doped samples could be achieved after sintering at 1900 degrees C for 4 h. The Y2O3/SiO2 ratio had a significant influence on the composition of crystalline secondary phases. Besides, the increased Y2O3/SiO2 ratio is conducive not only to the grain growth but also to the reduction of activity of SiO2 in the liquid phase, resulting in enlarged purified grains, reduced volume fraction of intergranular phases and increased Si3N4 -Si3N4 contiguity. Ultimately, the thermal conductivity increased by 29 % from 95.3 to 123.0 W m(-1 )K(-1) after sintering at 1900 degrees C for 12 h by the substitution of Y2O3 with YH2. |
| WOS关键词 | SILICON-NITRIDE CERAMICS ; MECHANICAL-PROPERTIES ; SI3N4 CERAMICS ; MGSIN2 ADDITION ; POWDER ; MICROSTRUCTURE ; GENERATION ; STRENGTH ; GLASSES ; OXYGEN |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27598]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Wang, WD,Yao, DX,Liang, HQ,et al. Effect of in-situ formed Y2O3 by metal hydride reduction reaction on thermal conductivity of beta-Si3N4 ceramics[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2020(15):5316. |
| APA | Wang, WD.,Yao, DX.,Liang, HQ.,Xia, YF.,Zuo, KH.,...&Zeng, YP.(2020).Effect of in-situ formed Y2O3 by metal hydride reduction reaction on thermal conductivity of beta-Si3N4 ceramics.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY(15),5316. |
| MLA | Wang, WD,et al."Effect of in-situ formed Y2O3 by metal hydride reduction reaction on thermal conductivity of beta-Si3N4 ceramics".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY .15(2020):5316. |
入库方式： OAI收割
来源：上海硅酸盐研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。