Development of TiO2-doped MgO refractories with enhanced corrosion resistance for preparing high-purity nickel-based superalloys
文献类型：期刊论文
| 作者 | Song, Qingzhong1,2; Zha, Xiangdong1,3; Shi, Junjie4; Gao, Ming1,3; Ma, Yingche1,3 |
| 刊名 | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 出版日期 | 2025-03-01 |
| 卷号 | 35页码:402-415 |
| 关键词 | Ceramic crucibles TiO2-doped MgO refractories Nickel-based superalloys Interfacial reaction Corrosion resistance Vacuum induction melting |
| ISSN号 | 2238-7854 |
| DOI | 10.1016/j.jmrt.2025.01.039 |
| 通讯作者 | Zha, Xiangdong(xdzha@imr.ac.cn) ; Ma, Yingche(ycma@imr.ac.cn) |
| 英文摘要 | MgO refractories extensively applied in melting nickel-based superalloys are limited by their poor thermal shock resistance and susceptibility to melt erosion. This study regulated the phase composition of MgO refractories by doping TiO2 to improve their properties and corrosion resistance. It was found that TiO2 is an effective dopant, addressing key limitations such as hard sintering, inadequate thermal shock resistance, and insufficient chemical stability. Firstly, the strong sintering ability of TiO2 promoted the densification of MgO crucibles by generating a liquid phase composed of TiO2-MgO-CaO-SiO2, resulting in a significant reduction in open porosity from 12.62% to 9.76% at a doping level of 5 wt%. Moreover, TiO2 alters the initial bonding phase from Ca2SiO4 into CaTiO3, Mg2SiO4, and Mg2TiO4, enhancing thermal shock resistance by generating microcracks, lowering thermal expansion coefficient, and detaching the matrix/aggregate bonding. Notably, adding TiO2 enhanced the corrosion resistance of MgO ceramic crucibles, reducing the total impurity content in the alloy from 0.0021 wt% to 0.0007 wt%. In summary, TiO2-doped MgO crucibles demonstrated superior performance compared to pure MgO and MgAl2O4 crucibles. |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001398891200001 |
| 出版者 | ELSEVIER |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zha, Xiangdong; Ma, Yingche |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, IMR NMSA, Shenyang 110016, Peoples R China 4.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Qingzhong,Zha, Xiangdong,Shi, Junjie,et al. Development of TiO2-doped MgO refractories with enhanced corrosion resistance for preparing high-purity nickel-based superalloys[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2025,35:402-415. |
| APA | Song, Qingzhong,Zha, Xiangdong,Shi, Junjie,Gao, Ming,&Ma, Yingche.(2025).Development of TiO2-doped MgO refractories with enhanced corrosion resistance for preparing high-purity nickel-based superalloys.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,35,402-415. |
| MLA | Song, Qingzhong,et al."Development of TiO2-doped MgO refractories with enhanced corrosion resistance for preparing high-purity nickel-based superalloys".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 35(2025):402-415. |
入库方式： OAI收割
来源：金属研究所
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