Impact of Annealing Time on the Formation of Nanocrystal in Amorphous FE75.5SI13.5CU1NB1B9 Alloy and their Ultra-Soft Magnetic Properties

To observe the impact of the annealing time on the alloy structure and ultra-soft magnetic properties of Fe75.5Si13.5Cu1Nb1B9, the alloy was annealed in a controlled way in the temperature range 475 - 600°C for different annealing time from 5 to 30 min. Amorphosity of the ribbon and nanocrystalline state was evaluated by X-ray diffraction. Grain size and Si content increase with increasing annealing temperature and time; on the other hand lattice parameter decrease with increasing annealing temperature and time. The maximum permeability was observed at annealing temperature Ta = 525°C for 15 min, and thereafter it starts to decreases. Saturation magnetization increases with annealing temperature Ta for the samples and finally decreases during annealing at a temperature much higher than peak crystallization temperature. The results of the experimental observations are explained on the basis of existing theories of nanocrystalline amorphous metallic ribbons.Journal of Bangladesh Academy of Sciences, Vol. 40, No. 2, 137-145, 2016

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Influence of The Alloy Composition on The Magnetic Properties of Nanocrystalline Fe80M7B12Cu1 (M: Ti, Ta, Nb, Mo)

MRS Proceedings ◽

10.1557/proc-577-487 ◽

1999 ◽

Vol 577 ◽

Cited By ~ 5

Author(s):

M. Kopcewicz ◽

A. Grabias ◽

B. Idzikowski

Keyword(s):

Magnetic Properties ◽

Annealing Temperature ◽

Alloy Composition ◽

Anisotropy Field ◽

Nanocrystalline Phase ◽

Soft Magnetic Properties ◽

Soft Magnetic ◽

Scanning Calorimetry ◽

Rf Magnetic Field ◽

Collapse Effect

ABSTRACTFormation of the nanocrystalline bcc Fe phase due to thermal treatment of the amorphous Fe80M7B12Cu1 (M: Ti, Ta, Nb, Mo) precursors is studied by the Mössbauer and differential scanning calorimetry techniques. The dependence of the formation of the bcc Fe phase on the alloy composition is discussed. In order to determine the optimal soft magnetic properties of these nanocrystalline alloys the rf-Mössbauer technique is used in which rf collapse effect induced by a radio-frequency (rf) magnetic field is employed. It was found that anisotropy fields in the nanocrystalline phase were smaller in Nb- and Mo-containing alloys as compared to the alloys which contain Ti or Ta. Variations of the anisotropy field vs. alloy composition and annealing temperature are discussed in detail.

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Microstructures and Magnetic Properties of Sputtered Expitaxial Co3Pt/Pt Multilayer Films

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.47-50.583 ◽

2008 ◽

Vol 47-50 ◽

pp. 583-587

Author(s):

S.C. Chen ◽

Po Cheng Kuo ◽

Chih Long Shen ◽

Y.H. Fang ◽

S.L. Hsu

Keyword(s):

Magnetic Properties ◽

Magnetic Anisotropy ◽

Epitaxial Growth ◽

Annealing Temperature ◽

Perpendicular Magnetic Anisotropy ◽

Multilayer Films ◽

Soft Magnetic Properties ◽

Soft Magnetic ◽

Annealing Temperatures

Co3Pt films were deposited on Pt underlayers with various thicknesses by conventional sputtering in order to investigate the effect of Pt underlayers and annealing temperatures on their microstructure and the magnetic properties. From XRD and HRTEM analysises, as annealing at 300°C, a well epitaxial growth of Co3Pt (002) on Pt (111) underlayer that leads the film to present perpendicular magnetic anisotropy. However, Pt atoms in the Pt underlayer will diffuse seriously into Co3Pt layer as the annealing temperature is increased to 375°C that changes the compositions to approach equiatomic CoPt, and showing in-plane magnetic anisotropy with soft magnetic properties.

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Structural Properties and Crystallization Behavior of FINEMET Fe74Cu1.5Nb2.5Si12B10 Alloy Under Different Annealing Condition

Dhaka University Journal of Science ◽

10.3329/dujs.v64i1.28527 ◽

2016 ◽

Vol 64 (1) ◽

pp. 71-75 ◽

Cited By ~ 1

Author(s):

Enayet Hossain ◽

Shamima Choudhury ◽

DK Saha ◽

MA Hakim

Keyword(s):

Grain Size ◽

Structural Properties ◽

Annealing Time ◽

Crystallization Temperature ◽

Crystallization Behavior ◽

Annealing Temperature ◽

Primary Crystallization ◽

Lattice Parameter ◽

Annealing Condition ◽

Si Content

The effect of annealing condition on nanocrystalline amorphous FINEMET type of alloy with nominal composition Fe74Cu1.5Nb2.5Si12B10 prepared by rapid solidification method has been studied to observe the structural properties and crystallization behavior of the material. Nanocrystalline alloy with ferromagnetic bcc nanocrystals with size 15-29 nm embedded in a residual amorphous matrix was produced from amorphous precursor by appropriate annealing condition. The amorphosity of the material, primary crystallization temperature, the nanometric grain size, Si content and the lattice parameter of Fe(Si) nano-phase have been determined from XRD patterns of the samples annealed at different temperatures ranging from 475°C - 650°C with annealing time 5, 12, 20 and 30 minutes. The annealing temperature 475°C (with annealing time of 12 minutes) was determined as primary crystallization temperature with grain size 15 nm, Si content 16.25 at.% and lattice parameter 2.8431 Å. The grains were found to grow rapidly after 550°C attaining a maximum value of 29 nm at the annealing temperature of 650°C. The grain size and Si content increase whereas the lattice parameter decreases with the increase of annealing temperature and time.Dhaka Univ. J. Sci. 64(1): 71-75, 2016 (January)

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Effect of Annealing Temperature on the Soft Magnetic Properties of Fe70.43Nb10.77Si15.77Cu2.34B0.69 Amorphous Aanostrips at 20K, 300K

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1035.773 ◽

2021 ◽

Vol 1035 ◽

pp. 773-777

Author(s):

Sheng Lei ◽

Shuai Li ◽

Jun Sun ◽

Ji Xiang Zhu ◽

Ya Feng Liu ◽

...

Keyword(s):

Magnetic Properties ◽

Annealing Temperature ◽

Annealing Treatment ◽

Practical Significance ◽

Soft Magnetic Properties ◽

X Ray Diffraction ◽

Soft Magnetic ◽

Magnetic Induction Intensity ◽

Saturation Magnetic Induction ◽

Microstructure And Magnetic Properties

Since Fe-based amorphous alloys are widely used in magnetic separators, sensors and other fields, it is of practical significance to carry out research on amorphous strips used in this field.The effects of annealing temperature on the soft magnetic properties of Fe70.43Nb10.77Si15.77Cu2.34B0.69 amorphous nanostrips with 25 μm and 28 μm thickness prepared by the single roll cold method were investigated at 20 and 300K.Five specimens were annealed at472.12K, 672.12K, 772.12K, 822.12Kand 872.12K, respectively, and their microstructure and magnetic properties were tested viametallographic microscopy, X-ray diffraction, and vibrating specimen magnetometer. At cryogenic temperatureof 20K, specimens annealed at 672,12K exhibited the best magnetic properties, including the coercive forceof8.1265A/m, saturation magnetic induction intensity of1.4351T,and its residual value of 0.2462T. The comparative analysis of experimental results obtained strongly indicates that the soft magnetic properties of the amorphous alloy are significantly improved by the particular annealing treatment.

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Glass Forming Ability, Thermal Stability, and Magnetic Properties of FeCoNiBSi Alloys with Different B Contents

Advances in Materials Science and Engineering ◽

10.1155/2018/4841025 ◽

2018 ◽

Vol 2018 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Haibo Sun ◽

Yongfei Wang

Keyword(s):

Thermal Stability ◽

Magnetic Properties ◽

Annealing Temperature ◽

Amorphous Structure ◽

Glass Forming Ability ◽

Soft Magnetic Properties ◽

Soft Magnetic ◽

Glass Forming ◽

Crystallization Onset ◽

Thermal Stability Of

The dependence on the glass forming ability, magnetic property, and thermal stability of the (Fe0.39Co0.15Ni0.46)82−xB12+xSi6 (x = 0, 2, 4, and 6) alloys was investigated. The results show that the as-quenched alloy ribbons exhibit a completely amorphous structure with B content in the range of 12∼18 at.%. The initial crystallization onset temperature of the as-quenched ribbon increases with the increase of B content. When the B content is up to 14 at.%, the temperature interval between the two crystallization peaks will sharply reduce, which narrows the effective annealing range that is detrimental to improving the soft magnetic properties. Both of the Ms and Hc of the as-quenched ribbons increase first and then decrease with the increase of B content. Here, the maximum Ms of 0.90 T and low Hc of 10.2 A/m can be obtained at the B content of 14 at.%. Additionally, the (Fe0.39Co0.15Ni0.46)80B14Si6 alloy exhibits the minimum Hc of 5.9 A/m and Ms of 0.934 T at the proposed annealing temperature of 698 K for 10 min in the vacuum condition.

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Effect of Annealing Time on the Magnetic Properties of FeNiCuNbSiB Dual-Phase Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.913.691 ◽

2018 ◽

Vol 913 ◽

pp. 691-699

Author(s):

Zhun Li ◽

Ke Fu Yao ◽

De Ren Li ◽

Xiao Jun Ni ◽

Zhi Chao Lu

Keyword(s):

Magnetic Properties ◽

Annealing Temperature ◽

Current Transformer ◽

Low Permeability ◽

Dual Phase ◽

Soft Magnetic Properties ◽

Soft Magnetic ◽

Ni Content ◽

Lower Permeability ◽

Optimum Annealing Temperature

A series of Fe75.5-xNixCu1Nb3Si12.5B8 (x=0.5-10 at. %) soft magnetic dual-phase alloys with low permeability were synthesized by adjusting Ni content. Effect of annealing on the soft-magnetic properties, crystallization behavior and microstructure were investigated. It is found that the temperature interval between the two crystallization temperature is significantly decreased from 169 to 127°C when the Ni content of the alloys increases from x=0.5 to x=10, which greatly reduces the optimum annealing temperature range. The alloys with higher Ni content are prone to exhibit lower permeability, and the alloys with the composition of Fe65.5Ni10Cu1Nb3Si12.5B8 exhibit excellent soft-magnetic properties, including the low permeability of 3350, low coercivity of about 1.26 A/m and low remanence of 8 mT. The combination of low permeability and excellent soft-magnetic properties makes the FeNiCuNbSiB nanocrystalline alloys to be a kind of promising material for common mode chokes and current transformer with direct current tolerance.

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Fe-Based Bulk Metallic Glass with Good Soft Magnetic Properties

Materials Science Forum ◽

10.4028/www.scientific.net/msf.789.59 ◽

2014 ◽

Vol 789 ◽

pp. 59-63

Author(s):

Min Xu ◽

Qun Jiao Wang

Keyword(s):

Magnetic Properties ◽

Metallic Glass ◽

Saturation Magnetization ◽

Annealing Temperature ◽

Soft Magnetic Properties ◽

Soft Magnetic ◽

Good Correspondence ◽

Glass Forming ◽

Copper Mold Casting ◽

Mold Casting

Bulk Fe73Nb3Al2Ge2P9C6B4Si1 metallic glass with the diameter of 2 mm was prepared by copper mold casting. The Fe-based metallic glass exhibits good magnetic properties with high saturation magnetization and low saturated magnetostriction. The saturation magnetization and coercive force remains almost unchanged with annealing temperature below the crystallization temperature. The crystallization leads to the decrease in the softness of magnetic properties. The Fe-based glass exhibits a good correspondence between large glass-forming ability and good soft magnetic properties.

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Effects of Si content on structure and soft magnetic properties of Fe81.3SixB17-xCu1.7 nanocrystalline alloys with pre-existing α-Fe nanocrystals

Journal of Materials Science ◽

10.1007/s10853-020-05404-w ◽

2020 ◽

Vol 56 (3) ◽

pp. 2539-2548

Author(s):

Xingjie Jia ◽

Wei Zhang ◽

Yaqiang Dong ◽

Aina He ◽

Jiawei Li ◽

...

Keyword(s):

Magnetic Properties ◽

Nanocrystalline Alloys ◽

Soft Magnetic Properties ◽

Soft Magnetic ◽

Si Content

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The Influence of Annealing on the Structural and Soft Magnetic Properties of (Fe0.4Co0.6)79Nb3B18 Nanocrystalline Alloys

Materials ◽

10.3390/ma11112171 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2171 ◽

Cited By ~ 1

Author(s):

Man Zhu ◽

Yang Fa ◽

Lijuan Yao ◽

Peng Tao ◽

Zengyun Jian ◽

...

Keyword(s):

Grain Size ◽

Magnetic Properties ◽

Incubation Time ◽

Annealing Temperature ◽

Isothermal Annealing ◽

Nanocrystalline Alloys ◽

Soft Magnetic Properties ◽

Soft Magnetic ◽

Fine Grain ◽

Mean Grain Size

The soft magnetic properties of Fe-based nanocrystalline alloys are determined by their grain size. In the present article, the (Fe0.4Co0.6)79Nb3B18 nanocrystalline alloys have been successfully prepared by isothermal annealing. The variation of soft magnetic properties as a function of annealing temperature and incubation time is investigated in detail. Two distinct crystallization behaviors were found for the (Fe0.4Co0.6)79Nb3B18 alloys. The initial nanocrystallization products comprise a mixture of α-Fe(Co), Fe2B, and Fe23B6-type crystalline metastable phases, and the final crystallization products are composed of α-Fe(Co), Fe2B, and Fe3B crystalline phases. The grain size decreases first and then increases with the increasing annealing temperature in the range of 764–1151 K, and a fine grain size with mean grain size of 12.7 nm can be achieved for alloys annealed at 880 K. As the annealing temperature increases from 764 K to 1151 K, the saturation magnetization increases first and then decreases without a significant increase of the coercivity. The alloys annealed at 880 K exhibit the optimized soft magnetic properties with high Ms of 145 emu g−1 and low Hc of 0.04 Oe.

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