Degradation mechanism of MgO-MgAl2O4 dual-phase refractory in contact with the automobile gear steel SCr420H with Si-Mn, Al and Ce-Al deoxidation

doi:10.1016/j.ceramint.2023.04.014

IMR OpenIR

	Degradation mechanism of MgO-MgAl2O4 dual-phase refractory in contact with the automobile gear steel SCr420H with Si-Mn, Al and Ce-Al deoxidation
	Sun, Meng 1; Jiang, Zhouhua 1,2; Li, Yang 1; Chen, Changyong 1; Ma, Yanshuo 1; Ma, Shuai 1; Li, Tianci 1; Liu, Hang 3
通讯作者	Jiang, Zhouhua(jiangzh@smm.neu.edu.cn) ; Li, Yang(liy@smm.neu.edu.cn)
	2023-07-01
发表期刊	CERAMICS INTERNATIONAL
ISSN	0272-8842
卷号	49 期号:13 页码:21903-21915
摘要	The current research, the degradation mechanism of MgO-MgAl2O4 dual-phase crucibles in contact with steel SCr420H with Si-Mn, Al, and Ce-Al deoxidation was investigated using a laboratory steelmaking experiment at 1873 K. The refractory interface in contact with the steel and inclusions was analysed using SEM and EPMA. In the case of Si-Mn deoxidation, the refractory's MgO phase was initially attacked by the dissolved Si, resulting in its transformation into the 2MgO-SiO2 phase, as confirmed by thermodynamic calculations. In the case of Al deoxidation, the reaction between the dissolved Al and the refractory had a significant effect on the increase in Mg concentration and MgAl2O4 inclusions. Refractory degradation was suppressed because the MgAl2O4 phase was an equilibrium phase based on thermodynamic consideration. The distribution of the MgAl2O4 phase in the refractory hindered the degradation reaction. The primary degradation mechanism in the case of Al deoxidation was steel penetration. In Ce-Al deoxidation, both Ce and Al were involved in refractory degradation. During this process, the MgO phase reacted with the dissolved Al, leading to its transformation into the MgAl2O4 phase, which was subsequently modified to the Ce-Al-O phase. Additionally, the MgAl2O4 phase was directly denatured into the Ce-Al-O phase.
关键词	Refractories Corrosion MgO Interfaces
资助者	National Science Foundation of China
DOI	10.1016/j.ceramint.2023.04.014
收录类别	SCI
语种	英语
资助项目	National Science Foundation of China[52074075]
WOS研究方向	Materials Science
WOS类目	Materials Science, Ceramics
WOS记录号	WOS:001013307100001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178358
专题	中国科学院金属研究所
通讯作者	Jiang, Zhouhua; Li, Yang
作者单位	1.Northeastern Univ, Sch Met, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China 2.Northeastern Univ, State Key Lab Rolling & Automat, 3-11 Wenhua Rd, Shenyang 110819, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Sun, Meng,Jiang, Zhouhua,Li, Yang,et al. Degradation mechanism of MgO-MgAl2O4 dual-phase refractory in contact with the automobile gear steel SCr420H with Si-Mn, Al and Ce-Al deoxidation[J]. CERAMICS INTERNATIONAL,2023,49(13):21903-21915.
APA	Sun, Meng.,Jiang, Zhouhua.,Li, Yang.,Chen, Changyong.,Ma, Yanshuo.,...&Liu, Hang.(2023).Degradation mechanism of MgO-MgAl2O4 dual-phase refractory in contact with the automobile gear steel SCr420H with Si-Mn, Al and Ce-Al deoxidation.CERAMICS INTERNATIONAL,49(13),21903-21915.
MLA	Sun, Meng,et al."Degradation mechanism of MgO-MgAl2O4 dual-phase refractory in contact with the automobile gear steel SCr420H with Si-Mn, Al and Ce-Al deoxidation".CERAMICS INTERNATIONAL 49.13(2023):21903-21915.