Effects of solid loading and calcination temperature on microstructure and properties of porous Si3N4 ceramics by aqueous gelcasting using DMAA system
文献类型：期刊论文
| 作者 | Yin, Shuang; Jiang, Senchuan; Pan, Limei; Guo, Lin; Zhang, Zhenghao; Zhang, Jingxian; Li, Xiaoyun; Qiu, Tai; Yang, Jian |
| 刊名 | CERAMICS INTERNATIONAL
 |
| 出版日期 | 2019-11-01 |
| 卷号 | 45期号:16页码:19925 |
| ISSN号 | 0272-8842 |
| 关键词 | Si3N4 ceramics Gelcasting Solid loading Calcination temperature Microstructure Mechanical properties |
| DOI | 10.1016/j.ceramint.2019.06.250 |
| 文献子类 | Article |
| 英文摘要 | Herein, a low toxic N, N dimethylacrylamide (DMAA) system was used in preparation of porous Si3N4 ceramics by aqueous gelcasting, and variations in microstructure and properties with solid loading and calcination temperature were systematically investigated. In the considered solid loading range of 28-44 vol%, all the slurries exhibited superior rheological properties (<= 145 mPa.s at 95.40 s(-1) for 44 vol% solid loading) perfectly suitable for casting. With increasing solid loading, a decreased bulk density (1.71-1.69 g/cm(3)), volume shrinkage (37.73-13.77%) and flexural strength (46.56-26.75 MPa) of green bodies were obtained, exhibiting better mechanical properties than those derived from the conventional acrylamide (AM) system. Regarding Si3N4 ceramics with various solid loadings, the increase in calcination temperature favored the phase transformation alpha ->beta-Si3N4 and beta-Si3N4 growth, however, the increased solid loading exhibited an inhibiting effect on those since mass transport in gas phase was blocked due to the disruption of pore connectivity. The resulting microstructure changes imparted Si3N4 ceramics increasing flexural strength (110.36-367.88 MPa), fracture toughness (2.54-5.03 MPa.m(1/2)), as well as decreasing porosity (54.21-41.05%) and pore size (0.38-0.33 mu m). This work demonstrates the potential research value of DMAA system in preparing high performance porous Si3N4 ceramics through gelcasting technique. |
| 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/331005/26741]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Yin, Shuang,Jiang, Senchuan,Pan, Limei,et al. Effects of solid loading and calcination temperature on microstructure and properties of porous Si3N4 ceramics by aqueous gelcasting using DMAA system[J]. CERAMICS INTERNATIONAL,2019,45(16):19925. |
| APA | Yin, Shuang.,Jiang, Senchuan.,Pan, Limei.,Guo, Lin.,Zhang, Zhenghao.,...&Yang, Jian.(2019).Effects of solid loading and calcination temperature on microstructure and properties of porous Si3N4 ceramics by aqueous gelcasting using DMAA system.CERAMICS INTERNATIONAL,45(16),19925. |
| MLA | Yin, Shuang,et al."Effects of solid loading and calcination temperature on microstructure and properties of porous Si3N4 ceramics by aqueous gelcasting using DMAA system".CERAMICS INTERNATIONAL 45.16(2019):19925. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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