Effect of Co addition on the magnetic properties and microstructure of FeNbBCu nanocrystalline alloys

Xue, Lin; Yang, Weiming; Liu, Haishun; He, Meng; Wang, Anding; Chang, Chuntao; Shen, Baolong

doi:10.1016/j.jmmm.2016.06.020

Cited by 35 publications

(8 citation statements)

References 26 publications

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“…7. Magnetization occurs when the intensity of an external magnetic field less than 1000 G and the coercivity (Hc) is 160 G. At pH 9.5, the plated veneer exhibited a soft magnetic property, which is similar to previous results (Xue et al 2016). In contrast, the hysteresis loop of the electroless plated veneer at pH=4.5 was ferromagnetic, the saturation magnetizations (MS) was 3.3 emu/g, the coercivity (Hc) was 1627 G, and the remanence (Mr) was 3.05 emu/g.…”

Section: Magnetic Characterizationsupporting

confidence: 88%

The Effect of pH on Electroless Ni-Fe-P Alloy Plating on Poplar Veneer

Guo¹,

Wang²,

Huang³

2017

BioResources

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Ni-Fe-P alloy coating was fabricated on poplar veneer substrates by an electroless plating method. The influence of pH on coating structure, elementary composition, thickness, crystal structure, surface resistivity, and magnetism were evaluated. The results indicated that when the plating solution pH was 9.5, the Ni-Fe-P coating had a crystal structure. The coating consisted of lamellar metal particles, and the thickness increased to 111 μm. This plated veneer showed soft magnetic properties. In contrast, when the plating solution pH was 4.5, the Ni-Fe-P coating had mainly an amorphous structure. The coating consisted of spherical metal particles, and the thickness was 67 μm. After 600 °C heat treatment, this plated veneer shifted to a crystalline structure and exhibited soft magnetic properties. In two kinds of plated veneers, the lateral direction resistivity was two times greater than the longitudinal direction resistivity.

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Section: Magnetic Characterizationsupporting

confidence: 88%

The Effect of pH on Electroless Ni-Fe-P Alloy Plating on Poplar Veneer

Guo¹,

Wang²,

Huang³

2017

BioResources

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“…Regarding the analysis of both samples: There are multiple exothermic processes below 500 °C that are probably associated with the structural relaxation and homogenization of alloys [ 16 , 24 ]; The main exothermic process occurs at temperatures above 500 °C and at a similar temperature interval (a slightly higher peak temperature of ~8 °C in the Co20 sample); With regard to the activation energy (of the main process) calculated in the two samples with cobalt, the energy of the alloy with 10% atomic cobalt is 267 kJ/mol, whereas that of the alloy with 20% cobalt is 332 kJ/mol. …”

Section: Resultsmentioning

confidence: 99%

“…There are multiple exothermic processes below 500 °C that are probably associated with the structural relaxation and homogenization of alloys [ 16 , 24 ];…”

Section: Resultsmentioning

confidence: 99%

“…Cu-free Hitperm alloys possess lower values of coercivity compared to Cu containing Hitperm [14] because some Cu atoms are on a solid solution in the substitutional sites. The applications of these materials include sensors, core transformers, thin film inductors, magnetic flux amplifiers, magnetocaloric systems [15,16] and micro-devices for avionic [17].…”

Section: Introductionmentioning

confidence: 99%

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Structural, Thermal and Magnetic Analysis of Fe75Co10Nb6B9 and Fe65Co20Nb6B9 Nanostructured Alloys

et al. 2021

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Two nanocrystalline ferromagnetic alloys of the Fe-Co-Nb-B system have been produced by mechanical alloying (MA). Their microstructure, thermal behavior and magnetic response were checked by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and vibrating sample magnetometry (VSM). After 80 h of MA, the alloys were nanostructured (bcc-Fe(Co)-rich phase). As the Co content increases, the density of the dislocations decreases. Besides, a higher concentration of Co causes an increase in the activation energy of the crystallization process. The calculated energies, 267 and 332 kJ/mol, are associated to the crystalline growth of the bcc-Fe-rich phase. The Co content of the samples has no effect on the value of the saturation magnetization, whereas the coercivity is lower in the alloy containing less Co. Samples were compacted and heat-treated. Optimal annealing reduces the coercivity by a factor of two. Results were compared with the data of Fe-Nb-B and Fe-Ni-Nb-B alloys.

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“…The soft magnetic properties in the Fe-based nanocrystalline alloys are determined by the type and grain size of the nano-scale precipitates. Nowadays, annealing crystallization is one of the key methods used to prepare Fe-based nanocrystalline alloys [6,7,8,9,10]. Therefore, it is of theoretical significance and engineering application value to explore the relationship between their magnetic properties and annealing process.…”

Section: Introductionmentioning

confidence: 99%

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

Zhu

Yao

et al. 2018

Materials

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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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Effect of Co addition on the magnetic properties and microstructure of FeNbBCu nanocrystalline alloys

Cited by 35 publications

References 26 publications

The Effect of pH on Electroless Ni-Fe-P Alloy Plating on Poplar Veneer

The Effect of pH on Electroless Ni-Fe-P Alloy Plating on Poplar Veneer

Structural, Thermal and Magnetic Analysis of Fe75Co10Nb6B9 and Fe65Co20Nb6B9 Nanostructured Alloys

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

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