Enhancement of glass-forming ability and thermal stability of a soft magnetic Co(75)B(25)metallic glass by micro-alloying Y and Nb

doi:10.1007/s42243-020-00489-8

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	Enhancement of glass-forming ability and thermal stability of a soft magnetic Co(75)B(25)metallic glass by micro-alloying Y and Nb
	Bao, Feng 2; Li, Yan-hui 2; Zhu, Zheng-wang 1; Liang, Xin-yu 2; Zhang, Yan 3; Zhang, Wei 2
刊名	JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
	2020-09-15
页码	7
关键词	Co-based bulk metallic glass Glass-forming ability Thermal stability Soft magnetic property Micro-alloying
ISSN号	1006-706X
DOI	10.1007/s42243-020-00489-8
通讯作者	Zhang, Wei(wzhang@dlut.edu.cn)
英文摘要	Soft magnetic Co-based Co-Y-Nb-B bulk metallic glasses (BMGs) without Fe have been developed by micro-alloying Y and Nb into a Co(75)B(25)alloy. First, addition of 3-4 at.% Y promotes the occurrence of glass transition and increases the supercooled liquid stability and magnetic softness. Co(71.5)Y(3.5)B(25)metallic glass possesses a large supercooled liquid region (Delta T-x) of 33 K and low coercivity (H-c) of 1.5 A/m. Subsequent alloying 2-4 at.% Nb into Co(71.5)Y(3.5)B(25)alloy further enlarges Delta T(x)to 50 K, lowersH(c)to 0.9 A/m, and enables the formation of BMGs with a critical sample diameter up to 2.0 mm. The alloying Nb causes the formation of complex (Co, Nb, Y)(23)B(6)competing phase during crystallization and widens the melt undercooling during solidification, which improves the supercooled liquid stability and glass-forming ability, respectively. Co-Y-Nb-B BMGs also exhibit good soft magnetic and mechanical properties, i.e., lowH(c)of 0.9-1.2 A/m, relatively high saturation magnetic flux density of 0.36-0.57 T, high yielding strength of 3877-3930 MPa with plastic strain of 0.2%-0.3%, and high Vickers hardness of 1156-1201. The developed soft magnetic Co-based BMGs are promising for applications as structural and functional materials.
资助项目	National Natural Science Foundation of China[51871039] ; National Natural Science Foundation of China[51771039] ; National Key Research and Development Program of China[2017YFB0903903]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000569544100001
资助机构	National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/140502]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Wei
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Sch Mat Sci & Engn, Dalian 116024, Liaoning, Peoples R China 3.Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
推荐引用方式 GB/T 7714	Bao, Feng,Li, Yan-hui,Zhu, Zheng-wang,et al. Enhancement of glass-forming ability and thermal stability of a soft magnetic Co(75)B(25)metallic glass by micro-alloying Y and Nb[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2020:7.
APA	Bao, Feng,Li, Yan-hui,Zhu, Zheng-wang,Liang, Xin-yu,Zhang, Yan,&Zhang, Wei.(2020).Enhancement of glass-forming ability and thermal stability of a soft magnetic Co(75)B(25)metallic glass by micro-alloying Y and Nb.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,7.
MLA	Bao, Feng,et al."Enhancement of glass-forming ability and thermal stability of a soft magnetic Co(75)B(25)metallic glass by micro-alloying Y and Nb".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL (2020):7.