High-temperature oxidation behavior of Co-doped WB2 ceramics in air
文献类型：期刊论文
| 作者 | Ma, Ke2; Cao, Xiaozhou1; Xue, Xiangxin1; Xu, Jingjun2; Zuo, Jun2; Li, Meishuan2 |
| 刊名 | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 99页码:10 |
| 关键词 | Co-doped WB2 ceramics Oxidation behavior Kinetics Oxide scale Microstructure |
| ISSN号 | 0263-4368 |
| DOI | 10.1016/j.ijrmhm.2021.105603 |
| 通讯作者 | Xue, Xiangxin(xuexx@mail.neu.edu.cn) |
| 英文摘要 | With the high melting point, excellent mechanical properties and good thermal stability, WB2 is a candidate of the promising high-temperature structural materials. WB2 ceramics were hot pressed at low temperatures (similar to 1500 degrees C) with a small amount of Co as sintering aids, achieving high relative density and mechanical properties. In this paper, Co-doped WB2 ceramics were selected as test materials to carry out the oxidation experiments systematically. The oxidation resistance of the samples was evaluated at temperatures of 800 degrees C, 1200 degrees C, and 1600 degrees C in static air. At 1200 degrees C and below, Co-doped WB2 ceramics still possessed good oxidation resistance. The oxidation behaviors of the Co-doped WB2 ceramics were studied and the oxidation mechanism was discussed in detail. Besides, the oxidation kinetics of the Co-doped WB2 ceramics at 1200 degrees C were studied. The result showed the oxidation rate of WB2 ceramics basically obeyed a parabolic law at 1200 degrees C. The existence of Co aids was not good for the oxidation resistance of WB2 ceramics, mainly due to the increasing oxygen vacancy concentration of the oxide scale. The phase compositions, the microstructure of the surface and cross section of the oxidized samples were characterized using X-ray diffraction and scan electron microscopy along with energy dispersive spectrometry. Beneath the surface, the oxide scale of Co-doped WB2 ceramics consisted of mainly WO3 skeleton layer and glassy B2O3 layer, which contributed to the good oxidation resistance at 1200 degrees C. |
| 资助项目 | National Natural Science Foundation of China[51472048] ; National Natural Science Foundation of China[52071318] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000674610200006 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/159580]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Xue, Xiangxin |
| 作者单位 | 1.Northeastern Univ, Sch Met, Dept Resource & Environm, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Ke,Cao, Xiaozhou,Xue, Xiangxin,et al. High-temperature oxidation behavior of Co-doped WB2 ceramics in air[J]. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,2021,99:10. |
| APA | Ma, Ke,Cao, Xiaozhou,Xue, Xiangxin,Xu, Jingjun,Zuo, Jun,&Li, Meishuan.(2021).High-temperature oxidation behavior of Co-doped WB2 ceramics in air.INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,99,10. |
| MLA | Ma, Ke,et al."High-temperature oxidation behavior of Co-doped WB2 ceramics in air".INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 99(2021):10. |
入库方式： OAI收割
来源：金属研究所
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。