Preparation and Magnetic Properties of Amorphous- and Nanocrystalline-alloys of FeCuNbSiB with high Fe-content

doi:10.11901/1005.3093.2015.417

Chinese Journal of Materials Research

2016, Vol. 30

Issue (1): 38-44 DOI: 10.11901/1005.3093.2015.417

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Preparation and Magnetic Properties of Amorphous- and Nanocrystalline-alloys of FeCuNbSiB with high Fe-content

WANG Ge¹, BAO Jinfeng¹, WANG Xinghua^2,³, CHEN Yuhe¹, ZHOU Fuwei¹, LI Qiang^1,^3,^**(

)

1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China
2. College of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
3. College of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China

Cite this article:

WANG Ge, BAO Jinfeng, WANG Xinghua, CHEN Yuhe, ZHOU Fuwei, LI Qiang. Preparation and Magnetic Properties of Amorphous- and Nanocrystalline-alloys of FeCuNbSiB with high Fe-content. Chinese Journal of Materials Research, 2016, 30(1): 38-44.

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Abstract

The effect of transition metal elements, such as Zr, Nb, Mo and Cu on the amorphous forming ability, thermal stability and magnetic propertywere investigated for the Fe₇₈Si₉B₁₃ alloy.By varying the Fe content of the Fe₇₄Cu₁Si₁₃B₉Nb₃amorphous alloy, two series alloys, i.e. Fe₍₇₆₊_x₎Cu₁Nb₃Si_(11-_x₎B₉(x=0, 2, 4) and Fe₍₇₉₊_x₎Cu₁Nb₂Si_(6-_x₎B₁₂(x=0, 2, 4) amorphous- and nanocrystalline-alloyswere prepared and finally their ribbons were producedby melt-spinning.The microstructures and magnetic properties of the prepared ribbonswere investigated by XRD, DSC, TEM and VSM etc. and the soft magnetic properties ofthe high Fe content alloyswere optimized by increasing the content of Nb.The results showed that theelements of Zr and Nb can effectively improve the amorphous forming ability and thermal stability of Fe₇₈Si₉B₁₃ alloys; A seriesFe-Cu-Nb-Si-B amorphous- and nanocrystalline-alloys with Fe content >80% (atomic fraction) were successfully prepared, themicrostructures of which are typically composed of dual amorphous- and nanocrystalline-phase. Their saturation magnetizations B_s are larger than 180emu/g and coercivitiesH_care between 2Oe and 9Oe, which means the alloys exhibit a good soft magnetic property. Thecoercivity would be reducedsince the grain size would be refined and thus the soft magnetic properties would be significantly improved as the Nbcontent increases. When the Fe content is between 80% (atomic fraction) and 83% (atomic fraction), the alloyswould exhibit an excellent soft magnetic property but when the Fe content comes to 85% (atomic fraction), phases of Fe₂B and Fe₃B would be precipitated that would furiouslydeterioratethe soft magnetic properties of the alloys.

Key words: metallic materials amorphous and nanocrystalline alloy amorphous forming ability saturation magnetization coercivity

Received: 22 July 2015

Fund: *Supported by the National Science and Technology Support Project of China No.2013BAE08B01, the Major State Basic Application Research Development Project of Hebei No.13961001D and the Basic and Frontier Applied Technology Project of Tianjin No.14JCZDJC38600.

About author: **To whom correspondence should be addressed, Tel: (022)60436888, E-mail: liqiang@hebut.edu.cn

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	Ge WANG
	Jinfeng BAO
	Xinghua WANG
	Yuhe CHEN
	Fuwei ZHOU
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https://www.cjmr.org/EN/10.11901/1005.3093.2015.417 OR https://www.cjmr.org/EN/Y2016/V30/I1/38

Fig.1 XRD curves of alloys added Zr, Nb, Mo or Cu to Fe₇₈Si₁₃B₉

Fig.2 DSC curves of Fe₇₇Cu₁Si₁₃B₉、Fe₇₄Cu₁Si₁₃B₉M₃(M=Zr、Nb)

Table 1 Characteristic temperatures (T_g, T_x, T_p1, T_p2, T_m, T_l) and GFAparameters (ΔT_x, T_rg) of alloys

Fig.3 M-H hysteresis loops of Fe_(77-_x₎Cu₁M_x Si₉B₁₂ alloys

Table 2 Magnetic parameters of Fe_(77-_x₎Cu₁M_x Si₁₃B₉

Fig.4 XRD curves of Fe₍₇₄₊_x₎Cu₁Nb₃Si_(13-_x₎B₉(x=0, 2, 4, 6)

Fig.5 XRD curves of Fe₈₅Cu₁Nb₂Si₂B₁₀ and Fe₍₇₉₊_x₎Cu₁Nb₂Si_(6-_x₎B₁₂(x=0, 2, 4)

Fig.6 TEM pictures on alloys of (a) Fe₇₉Cu₁Nb₂Si₆B₁₂, (b) Fe₈₁Cu₁Nb₂Si₄B₁₂, (c) Fe₈₃Cu₁Nb₂Si₂B₁₂

Table 3 Magnetic parameters of high Fe content FeCuNbSiB alloys

Fig.7 Relation of B_s and H_c with Fe content of FeCuNbSiB alloys

Fig.8 XRD curves of Fe_(83-_x₎Cu₁Nb₍₂₊_x₎Si₂B₁₂(x=0, 1, 2, 3)

Fig.9 Changing curves of B_s and H_c with Nb content of Fe_(83-_x_)-Cu₁Nb₍₂₊_x₎Si₂B₁₂(x=1, 2, 3)

Table 4 Magnetic parameters of Fe_(83-_x₎Cu₁Nb₍₂₊_x₎Si₂B₁₂(x=1, 2, 3)

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