Magnetostriction of melt-spun Fe85Ga15, Fe78Ni7Ga15 and Fe78Co7Ga15 stacked ribbon samples

Bormio-Nunes, Cristina; Turtelli, R. Sato; Größinger, R.; Müller, Herbert; Sassik, H.

doi:10.1016/j.jmmm.2009.06.008

Cited by 13 publications

(7 citation statements)

References 14 publications

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“…. fabricated by rapid solidification method [15][16][17][18][19]. It is suggested that the low melting temperature of Ga is a reason for inducing crystallographic texture for the Ga-containing melt-spun ribbons.…”

Section: Resultsmentioning

confidence: 99%

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Nd–Fe–B-based anisotropic nanocrystalline hard magnetic alloys

Nguyen

Pham

et al. 2012

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Nd 10.5 Fe 83.5−x Ga x B 6 (x=1.5, 3 and 4.5) ribbons were prepared by melt-spinning method with various wheel speeds from 5 to 40 m s −1. Strong crystallographic texture with c-axis of Nd 2 Fe 14 B crystallites along normal of the ribbon surface was observed. The texture degree can be enhanced by decreasing the quenching rate during solidification of the melt and by increasing the concentration of Ga. Preferred orientation of the nanocrystallites with their size of 10–30 nm is obtained not only by controlling the quenching rate of the melt during solidification but also by appropriately annealing the over-quenched ribbons. The texture of microstructure clearly affects magnetic anisotropy of the ribbons. With increasing concentration of Ga, the magnetic anisotropy of the ribbons is considerably increased. The coercivity above 6.5 kOe and maximum energy products larger than 15 MGOe can be achieved on the ribbons with Ga-concentration of 1.5%.

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Section: Resultsmentioning

confidence: 99%

“…can also affect anisotropy of the exchange spring magnets. It should be noted that Ga could considerably influence the preferred orientation or texture of the crystalline grains in a number of the alloys prepared by rapid solidification [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Nd–Fe–B-based anisotropic nanocrystalline hard magnetic alloys

Nguyen

Pham

et al. 2012

Adv. Nat. Sci: Nanosci. Nanotechnol.

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“…However, the impacts of the melt‐spinning parameters have only been covered in a relatively small number of investigations for the multicomponent HEAs 30 . In contrast to as‐cast materials, RSP using melt spinning produces homogeneous, textured polycrystalline ribbons 31,32 . Therefore, it is anticipated that the quick solidification of multicomponent HEAs by the melt‐spinning technique can result in better qualities than those achieved by conventional casting.…”

Section: Introductionmentioning

confidence: 99%

“…30 In contrast to as-cast materials, RSP using melt spinning produces homogeneous, textured polycrystalline ribbons. 31,32 Therefore, it is anticipated that the quick solidification of multicomponent HEAs by the meltspinning technique can result in better qualities than those achieved by conventional casting. The benefits of a solidified melt-spun ribbon over arc melting are to enhance the hydrogen absorption capacity and better hydrogen absorption-desorption cyclic stability.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen storage properties in rapidly solidified TiZrVCrNi high‐entropy alloys

Kumar,

Yadav,

Shaz

et al. 2023

Energy Storage

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The development of alloys with substantial hydrogen storage capacities is a potential solution to the demand for hydrogen storage in a future hydrogen‐based energy system. The synthesis, structural‐microstructural properties, and hydrogen storage performance of a multicomponent TiZrVCrNi high‐entropy melt‐spun ribbon have been discussed in the present investigation. The x‐ray diffraction and transmission electron microscopy investigations confirm that this as‐cast and melt‐spun alloy contains only a single C14‐type hexagonal (a = b = 5.02 Å, c = 8.15 Å, α = β = 90°, γ = 120°) Laves phase. The room temperature pressure composition isotherms were studied with a pressure range of 0 to 40 atm. Continuing from our previous study in which we reported a hydrogen storage capacity of ~1.5 wt% in an as‐cast high‐entropy alloy synthesized using Arc melting, the total hydrogen storage capacity of TiZrVCrNi high‐entropy melt‐spun ribbons was found to be ~2 wt% in this work. This study makes the way forward for greater hydrogen storage in melt‐spun ribbons. The observation of only minimal losses in storage capacity, even after 10 cycles of experiments on hydrogen absorption, shows that the reversible hydrogen storage capacity has high durability. To the best of our knowledge, these demonstrations are the first to present a study on the hydrogen storage capacity (~2 wt%) of the equiatomic TiZrVCrNi melt‐spun ribbons.

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“…2 In the case of arc-melted alloys, a mixture of only two phases (A2 and D0 3 -type) has been observed. [3][4][5] From the above review, it is clear that the degree of ordering is likely to be very sensitive to the details of alloy production. 6,7 In this work, TEM study confirms that in Fe 73 Ga 27 FSM alloy solution-treated at 1100 C for 4 h and quenched in ice brine (as-quenched), antiphase boundary segment (APBs) of the D0 3 domain were present in the A2 matrix.…”

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confidence: 99%

Effects of phase transformation on the microstructures and magnetostriction of Fe-Ga and Fe-Ga-Zn ferromagnetic shape memory alloys

Lin

2015

Journal of Applied Physics

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The phase transformation and magnetostriction of bulk Fe 73 Ga 27 and Fe 73 Ga 18 Zn 9 (at. %) ferromagnetic shape memory alloys (FSMs) were investigated by transmission electron microscopy (TEM), x-ray diffraction (XRD), and a magnetostrictive-meter setup. For the Fe 73 Ga 27 FSM alloy solution treated at 1100 C for 4 h and quenched in ice brine, the antiphase boundary segments of the D0 3 domain were observed in the A2 (disordered) matrix, and the Fe 73 Ga 27 FSM alloy had an optimal magnetostriction (k k s ¼ 71 Â 10 À6 and k ? s ¼ À31 Â 10 À6 ). In Fe 73 Ga 27 FSM alloy as-quenched, aged at 700 C for 24 h, and furnace cooled, D0 3 nanoclusters underwent phase transformation to an intermediate tetragonal phase (i.e., L1 0 -like martensite) via Bain distortion, and finally L1 2 (Fe 3 Ga) structures precipitated, as observed by TEM and XRD. The L1 0 -like martensite and L1 2 phases in the aged Fe 73 Ga 27 FSM alloy drastically decreased the magnetostriction from positive to negative (k k s ¼ À20 Â 10 À6 and k ? s ¼ À8 Â 10 À6 ). However, in Fe 73 Ga 18 Zn 9 FSM alloy as-quenched and aged, the phase transformation of D0 3 to an intermediate tetragonal martensite phase and precipitation of L1 2 structures were not found. The results indicate that the aged Fe 73 Ga 18 Zn 9 FSM alloy maintained stable magnetostriction (k k s ¼ 36 Â 10 À6 and k ? s ¼ À31 Â 10 À6 ). Adding Zn can improve the ferromagnetic shape memory effect of aged Fe 73 Ga 18 Zn 9 alloy, which may be useful in application of the alloy in high temperature environments. V C 2015 AIP Publishing LLC. [http://dx.The Fe-Ga (Galfenol) FSM alloy systems have received much attention because they exhibit both magnetic field induced strain and the magnetic shape memory effect. In addition, Fe-Ga alloys have high saturation magnetostriction in low applied magnetic fields, so the alloys have a potential application in magnetostrictive actuators and sensors. For bulk polycrystalline multiphase Fe-Ga alloys, A2, D0 3 , and L1 2 structures have been reported to coexist in rapidly quenched alloys 1 as well as in mechanically alloyed systems. 2 In the case of arc-melted alloys, a mixture of only two phases (A2 and D0 3 -type) has been observed. 3-5 From the above review, it is clear that the degree of ordering is likely to be very sensitive to the details of alloy production. 6,7 In this work, TEM study confirms that in Fe 73 Ga 27 FSM alloy solution-treated at 1100 C for 4 h and quenched in ice brine (as-quenched), antiphase boundary segment (APBs) of the D0 3 domain were present in the A2 matrix. When the Fe 73 Ga 27 FSM alloy was as-quenched and aged at 700 C for 24 h (as-quenched and aged), the D0 3 nanoclusters underwent phase transformation to an intermediate tetragonal phase (L1 0 -like martensite) via Bain distortion, and finally L1 2 structures precipitated, as demonstrated by TEM and XRD analyses. The L1 0 -like martensite and L1 2 structures in the aged Fe 73 Ga 27 FSM alloy drastically decreased the magnetostriction from positive to negative, as also confi...

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Magnetostriction of melt-spun Fe85Ga15, Fe78Ni7Ga15 and Fe78Co7Ga15 stacked ribbon samples

Cited by 13 publications

References 14 publications

Nd–Fe–B-based anisotropic nanocrystalline hard magnetic alloys

Nd–Fe–B-based anisotropic nanocrystalline hard magnetic alloys

Hydrogen storage properties in rapidly solidified TiZrVCrNi high‐entropy alloys

Effects of phase transformation on the microstructures and magnetostriction of Fe-Ga and Fe-Ga-Zn ferromagnetic shape memory alloys

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