Development of TiO2-doped MgO refractories with enhanced corrosion resistance for preparing high-purity nickel-based superalloys

doi:10.1016/j.jmrt.2025.01.039

IMR OpenIR

	Development of TiO2-doped MgO refractories with enhanced corrosion resistance for preparing high-purity nickel-based superalloys
	Song, Qingzhong 1,2; Zha, Xiangdong 1,3; Shi, Junjie 4; Gao, Ming 1,3; Ma, Yingche 1,3
通讯作者	Zha, Xiangdong(xdzha@imr.ac.cn) ; Ma, Yingche(ycma@imr.ac.cn)
	2025-03-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	35 页码:402-415
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.
关键词	Ceramic crucibles TiO2-doped MgO refractories Nickel-based superalloys Interfacial reaction Corrosion resistance Vacuum induction melting
DOI	10.1016/j.jmrt.2025.01.039
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001398891200001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180237
专题	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.