Oxidation Behavior of K4750 Alloy at Temperatures Between 750 degrees C and 1000 degrees C
文献类型：期刊论文
| 作者 | Liu, Yan-Li1,2; Hou, Kun-Lei1,2; Ou, Mei-Qiong1; Ma, Ying-Che1; Liu, Kui1 |
| 刊名 | ACTA METALLURGICA SINICA-ENGLISH LETTERS
 |
| 出版日期 | 2021-05-18 |
| 页码 | 12 |
| ISSN号 | 1006-7191 |
| 关键词 | Ni-based superalloy Oxidation Titanium Internal oxides |
| DOI | 10.1007/s40195-021-01235-z |
| 通讯作者 | Ou, Mei-Qiong(mqou@imr.ac.cn) ; Ma, Ying-Che(ycma@imr.ac.cn) |
| 英文摘要 | This study investigated the oxidation behavior of a new casting Ni-based superalloy K4750 at 750 degrees C-1000 degrees C in air for 100 h-1000 h by isothermal oxidation tests. The oxidation-kinetic curves were plotted by the static discontinuous weight gain method. Observation and identification of oxidation products were conducted using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), electron probe micro-analysis (EPMA) and X-ray diffraction (XRD). X-ray photoelectron spectrometer (XPS) was also used to analyze the chemical state of elements and the distribution in depth. The results showed that the oxidation-kinetic curves of K4750 alloy basically obeyed the parabolic law. The average oxidation rate below 900 degrees C was less than 0.1 g/m(2)center dot h which meant the alloy was at a complete anti-oxidation grade, and the alloy was at an anti-oxidation grade at 1000 degrees C. The predominant surface oxide was Cr2O3, and a double layer structure of the oxide scale was observed at all tested temperatures as time increased. The outer oxide layer contained continuous Cr2O3 and a small amount of oxides mixed TiO2 and NiCr2O4, while the inner oxide layer was composed with Al2O3. The oxidation process could be interpreted by the competitive oxidation of different elements. The diffusion rate of Ti through Cr2O3 layer increased with increasing temperature, and thus the generation of TiO2 was advantageous. The dispersed TiO2 reaching a certain amount destroyed the continuity of the surface oxide layer, which accounted for the reduction of oxidation resistance of K4750 alloy at high temperatures. |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | CHINESE ACAD SCIENCES, INST METAL RESEARCH |
| WOS记录号 | WOS:000651688600002 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/161266]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Ou, Mei-Qiong; Ma, Ying-Che |
| 作者单位 | 1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yan-Li,Hou, Kun-Lei,Ou, Mei-Qiong,et al. Oxidation Behavior of K4750 Alloy at Temperatures Between 750 degrees C and 1000 degrees C[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2021:12. |
| APA | Liu, Yan-Li,Hou, Kun-Lei,Ou, Mei-Qiong,Ma, Ying-Che,&Liu, Kui.(2021).Oxidation Behavior of K4750 Alloy at Temperatures Between 750 degrees C and 1000 degrees C.ACTA METALLURGICA SINICA-ENGLISH LETTERS,12. |
| MLA | Liu, Yan-Li,et al."Oxidation Behavior of K4750 Alloy at Temperatures Between 750 degrees C and 1000 degrees C".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2021):12. |
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。