| Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature | |
| Rehman, Khalil1,2; Sheng, Naicheng1; Fan, Shigang1; Sun, Shijie1; Hou, Guicheng1; Zhou, Yizhou1; Sun, Xiaofeng1 | |
| Corresponding Author | Sheng, Naicheng(ncsheng@imr.ac.cn) |
| 2022-04-08 | |
| Source Publication | ACTA METALLURGICA SINICA-ENGLISH LETTERS
 |
| ISSN | 1006-7191 |
| Pages | 15 |
| Abstract | Ni-based superalloys added with comparably higher concentrations of single-doped Hf and co-doped Hf/Y are prepared by vacuum induction melting (VIM). The oxidation properties up to 300 h at 900 degrees C, 1000 degrees C, and 1100 degrees C are investigated. The undoped alloy exhibited a minimum oxidation rate at 900 degrees C and 1000 degrees C. The co-doped alloy showed a higher oxidation rate; however, it possesses better scale adhesion, and no spallation occurs. Hf-doped alloy showed a lower oxidation rate and better scale adhesion at 900 degrees C and 1000 degrees C, but exhibited a shorter lifetime at 1100 degrees C. The spallation of the Hf-doped alloy is attributed to the precipitation of the HfO2 in and beneath the oxide scale. The spallation in the undoped alloy is accredited to the thermal expansion mismatch between the growing oxide scale and superalloy substrate. Incorporating two reactive elements (REs) in alloy minimized the precipitation of RE oxide in the oxide scale, diminished internal oxidation in the alloy, and decreased oxide scale spallation. |
| Keyword | Superalloys Reactive elements Oxidation kinetics Microstructure Spallation resistance |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1007/s40195-022-01407-5 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51971214] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000781275200001 |
| Publisher | CHINESE ACAD SCIENCES, INST METAL RESEARCH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/172973 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Sheng, Naicheng |
| Affiliation | 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 |
| Recommended Citation GB/T 7714 | Rehman, Khalil,Sheng, Naicheng,Fan, Shigang,et al. Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2022:15. |
| APA | Rehman, Khalil.,Sheng, Naicheng.,Fan, Shigang.,Sun, Shijie.,Hou, Guicheng.,...&Sun, Xiaofeng.(2022).Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature.ACTA METALLURGICA SINICA-ENGLISH LETTERS,15. |
| MLA | Rehman, Khalil,et al."Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2022):15. |
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