Enhancement in the elongation, yield strength and magnetic properties of intermetallic FeCo alloy using spark plasma sintering

Albaaji, Amar J.; Castle, Elinor G.; Reece, Mike; Hall, Jeremy Peter; Evans, Samuel Lewin

doi:10.1007/s10853-017-1435-5

Cited by 17 publications

(9 citation statements)

References 35 publications

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“…The importance of intermetallic compounds (IMCs) has been long recognized for their use in magnetic materials, [1][2][3] superconducting materials, [4][5][6] hydrogen storage, 7,8 shape-memory materials, 9 and heterogeneous catalysis. [10][11][12][13] IMCs have been reported to show improved selectivity to hydrogenation, 14,15 oxidation, 12,13 steam reforming, 16,17 and hydroformylation 18 compared to their monometallic counterparts, providing an effective alternative to the noble metal catalysts used in the industry.…”

Section: Introductionmentioning

confidence: 99%

Kinetics, energetics, and size dependence of the transformation from Pt to ordered PtSn intermetallic nanoparticles

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Kinetics, energetics, and size dependence of the transformation from Pt to ordered PtSn intermetallic nanoparticles

et al. 2019

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“…Finally, we would like to discuss the magnetostriction and UTS of annealed Fe 29 Co 71 wire compared with the other magnetostrictive materials based on the earlier results. Figure 10 shows these characteristics with common Fe-based magnetostrictive materials such as Fe-Co system, Fe-Ga system, Fe-Al, and Tb-Dy-Fe alloys [8][9][10][11][12][13][15][16][17][18] reported so far. In general, there is a trade-off relationship between the amount of magnetostriction and the strength of Fe-based magnetostrictive alloys.…”

Section: Out = V W Output By Cyclic Compression Testmentioning

confidence: 99%

Microstructure‐Enhanced Inverse Magnetostrictive Effect in Fe–Co Alloy Wires

et al. 2020

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Vibratory power generation technology using the inverse magnetostriction effect, which is a magnetic flux change induced by stress, in ferromagnetic materials has attracted significant attention. Recently, polycrystalline magnetostrictive alloys with a combination of high stiffness and strength and large magnetostriction have become desirable for various smart applications, such as energy harvesters [1] and microscale sensors [2] and actuators. [3] However, the current understanding of the microstructure-property relationship of magnetostrictive materials is still limited due to the complexity of their grain geometry, multi-objective design requirements, and the lack of experimental verifications. [4,5] In 1965, Clark et al. [6] reported that Tb-Dy-Fe alloy (Terfenol-D) exhibits excellent magnetostriction (%1600 ppm), a large generated force (%30 000 N), and high responsiveness (%40 μs). Magnetostrictive alloys have been widely used as actuators, but the scope of engineering applications is limited because of the brittleness in Terfenol-D. In 2000, Fe-Ga-Al alloy (Galfenol) attracted attention for its excellent magnetostrictive properties and rigidity. [7-10] Many studies focus on the addition of third elements or controlling the nanostructure. Wu et al. [11] reported that the addition of the rare-earth element Tb exhibited large magnetostriction (400 ppm) and good strength (400 MPa). Recently, Na et al. [12] developed Fe-Al alloy (Alfenol) with a strong <100> orientation in the roll direction that showed good magnetostriction (%200 ppm) and tensile strength (606 MPa). Thus, it is speculated that the magnetostriction and mechanical properties of magnetostrictive materials show a contradictory relationship; that is, there are some difficulties in improving both characteristics simultaneously. Mashiyama [13] and Furuya et al. [14] found that Co-rich Fe 1-x Co x alloys (x ¼ 50-90 at%) have excellent magnetostrictive and mechanical properties. [15-18] Yamaura et al. [19] demonstrated larger magnetostriction of 128 ppm along the rolling direction in an Fe 25 Co 75 alloy by cold rolling (rolling rate of %97%) compared with the other composition in Fe-Co system. These Co-rich Fe-Co alloys have been gradually used commercially because they are easy to transform into any shape for applications. [20-25] Thus, the composition of Fe 29 Co 71 seems to be superior to the other composition in the viewpoint of magnetostrictive and mechanical characteristics in Fe-Co system. [13,19] These characteristics are preferred to be the applications of mechanical sensors or energy harvesters assumed in an industrial environment.

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“…However, the fast heating rate of 300 • C.min -1 was effective in reducing grain size, therefore an increase in coercivity value was observed. Conflicting behaviour is observed when the sintering temperature is increased to 1100 • C, due to the reduction in volume fraction of the ordered state at faster heating rates, 6 and increase the grain size. Moreover, sintering at high temperature helps in releasing the coercivity dependent on residual stresses in the material which are introduced during mechanical pressing and causes more purification for structure.…”

Section: B Magnetic Propertiesmentioning

confidence: 99%

“…The detailed of microstructure study of FeCo alloy sintered following the above-mentioned sintering conditions are reported in our previous study on mechanical properties in Ref. 6.…”

Section: A Relative Density and Grain Sizementioning

confidence: 99%

“…[3][4][5] Newly, the mechanical properties of FeCo alloy were significantly improved by SPS at certain sintering conditions. 6 Therefore, the current study aims to evaluate the magnetic properties of FeCo alloy sintered at different sintering conditions in order to optimise the best sintering conditions for the best combination of magnetic and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Influence of spark plasma sintering parameters on magnetic properties of FeCo alloy

et al. 2017

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Equiatomic FeCo alloys with average particle size of 24 μm were sintered using spark plasma sintering (SPS) system at sintering temperatures of 1100, 800, and 850 °C for heating rates 50, 100, 300 °C/min by applying pressure of 50 MPa instantly at room temperature for sintering time of 5 and 15 minutes. The highest saturation induction was achieved at SPS conditions of 50 MPa, 50 °C/min, 1100 °C, without dwelling, of value 2.39 T. The saturation induction was improved with extending sintering time, the coercivity was higher in samples sintered at a fast heating rate in comparison to the slowest heating rate.

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Enhancement in the elongation, yield strength and magnetic properties of intermetallic FeCo alloy using spark plasma sintering

Cited by 17 publications

References 35 publications

Kinetics, energetics, and size dependence of the transformation from Pt to ordered PtSn intermetallic nanoparticles

Kinetics, energetics, and size dependence of the transformation from Pt to ordered PtSn intermetallic nanoparticles

Microstructure‐Enhanced Inverse Magnetostrictive Effect in Fe–Co Alloy Wires

Influence of spark plasma sintering parameters on magnetic properties of FeCo alloy

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