A new strategy for dense Al2O3 ceramics by spherical powders prepared via thermal plasma
文献类型：期刊论文
| 作者 | Ouyang, Yuge1,2; Bai, Liuyang1 ; Sun, Zhiqiang3; Ding, Fei1; Yuan, Fangli1
|
| 刊名 | CERAMICS INTERNATIONAL
 |
| 出版日期 | 2019-02-01 |
| 卷号 | 45期号:2页码:2012-2019 |
| ISSN号 | 0272-8842 |
| 关键词 | Spherical powders Alumina ceramics Sintering kinetics Dislocations |
| DOI | 10.1016/j.ceramint.2018.10.099 |
| 英文摘要 | It still attracts numerous research to fabricate high-performance Al2O3 ceramics with low cost by a simple and feasible process for industrial applications. In this paper, spherical Al2O3 powders with a high purity prepared via radio frequence induction thermal plasma in large scale are used to sinter dense ceramics by an easy method of pressure-less sintering under air atmosphere. The results reveal that Al2O3 ceramic with a high relative density of 98.7% is obtained at 1600 degrees C using the ball milled powders. Importantly, the sample exhibits excellent elastic modulus of 400.2 Gpa as well as high hardness of 22.9 Gpa. Besides the outstanding features of uniform sphere, well dispersity and dense structure, Al2O3 powders after ball milling possess better sintering activity, which is responsible for the relatively low sintering temperature and good mechanical properties. Subsequent analyses of sintering kinetics and crystal structure demonstrate that milled powders show decreased sintering activation energy because of introduced amorphous phase and dislocation during milling process. Therefore, our strategy provides an insight in developing high-performance Al2O3 ceramics by a low-cost and feasible method and creates more possibilities for the large-scale industrial application of products. |
| WOS关键词 | ALUMINA CERAMICS ; MICROSTRUCTURAL DEVELOPMENT ; SINTERING BEHAVIOR ; DENSIFICATION ; SHRINKAGE ; KINETICS ; ALLOY ; SIZE |
| 资助项目 | National Natural Science Foundation of China[11535003] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000453492800065 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/27561]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Bai, Liuyang; Yuan, Fangli |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Aerosp Inst Adv Mat & Proc Technol, Beijing 100071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ouyang, Yuge,Bai, Liuyang,Sun, Zhiqiang,et al. A new strategy for dense Al2O3 ceramics by spherical powders prepared via thermal plasma[J]. CERAMICS INTERNATIONAL,2019,45(2):2012-2019. |
| APA | Ouyang, Yuge,Bai, Liuyang,Sun, Zhiqiang,Ding, Fei,&Yuan, Fangli.(2019).A new strategy for dense Al2O3 ceramics by spherical powders prepared via thermal plasma.CERAMICS INTERNATIONAL,45(2),2012-2019. |
| MLA | Ouyang, Yuge,et al."A new strategy for dense Al2O3 ceramics by spherical powders prepared via thermal plasma".CERAMICS INTERNATIONAL 45.2(2019):2012-2019. |
入库方式： OAI收割
来源：过程工程研究所
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