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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; Li, Yan-hui; Zhu, Zheng-wang; Liang, Xin-yu; Zhang, Yan; Zhang, Wei
2020-09-15
Source PublicationJOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
AbstractSoft 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.
DOI10.1007/s42243-020-00489-8
WOS IDWOS:000569544100001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82524
Collection中国科学院金属研究所
Recommended Citation
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.
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.
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).
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