Investigation of temperature dependent magnetization and elastic modulus in Si-doped Fe65Ni35 invar alloys

Özöğüt, Uğur Can; Çakır, Aslı

doi:10.1016/j.jallcom.2017.02.066

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…Softening in E-mod and decreasing T c are an indication for the decreasing energy difference between high-spin and low-spin states. Volume shrinkage and lowering T c are also observed in hydrostatic pressure and alloying studies [17,[24][25][26]. Al doping to the Fe 65 Ni 35 Invar alloy yields results similar to adding Si.…”

Section: Resultsmentioning

confidence: 64%

“…The effect of doping some elements has also been investigated for Invar properties [14][15][16]. Our previous work on elastic modulus properties shows that doping the Invar alloy with Si leads to the occurrence of an additional hexagonal structure next to the face-centered cubic and a decrease in T c [17]. Si doping to an Invar alloy has similarities to applying hydrostatic pressure.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Al doping on the magnetic and elastic properties of Fe65Ni35Invar alloys

Çakır¹

2019

Turk J Phys

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Invar alloys have great importance due to their low thermal expansion coefficient. The effect of Al doping on Fe 65 Ni 35 Invar alloy was investigated by temperature-dependent magnetization and elastic modulus measurements. First, 0.44 at% and 2.24 at% of Al were substituted for Ni. Then X-ray diffraction measurements, Rietveld refinements, and scanning electron microscopy studies were performed to understand the effect of Al-doping on the face-centered cubic structure. The elastic modulus of Fe 65 Ni 35 and the Al-doped samples were measured in the temperature range 300 ≤ T ≤ 870 K using impulse excitation. The temperature dependence of magnetization and elastic modulus results for the Al-doped Invar alloys were compared with those of nondoped Invar alloy. Al doping to Fe 65 Ni 35 Invar alloy led to volume shrinkage and decreasing Curie temperature as seen in the effect of hydrostatic pressure application.

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Section: Resultsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Effect of Al doping on the magnetic and elastic properties of Fe65Ni35Invar alloys

Çakır¹

2019

Turk J Phys

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“…Soft magnetic materials, which can be easily (de)magnetized owing to high permeability and low coercivity, [1][2][3] play a crucial role in alternating current (AC) applications (e.g., power stations, power generators, electric motors, transformers, and converters). [4][5][6] Because silicon steel shows outstanding soft magnetic properties as well as a relatively low price, it is widely DOI: 10.1002/adma.202300837 used in the abovementioned fields and accounts for a market share of ≈80%. [4,5,7] However, power losses (including hysteresis losses, eddy current losses and anomalous losses/excess eddy current losses) remarkably reduce energy efficiency and increase expenses; [3,[8][9][10] i.e., for transformers, the decrease of 1.5% in energy efficiency results in the extra cost of $12 billion per year.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6] Because silicon steel shows outstanding soft magnetic properties as well as a relatively low price, it is widely DOI: 10.1002/adma.202300837 used in the abovementioned fields and accounts for a market share of ≈80%. [4,5,7] However, power losses (including hysteresis losses, eddy current losses and anomalous losses/excess eddy current losses) remarkably reduce energy efficiency and increase expenses; [3,[8][9][10] i.e., for transformers, the decrease of 1.5% in energy efficiency results in the extra cost of $12 billion per year. [1,2] In traditional industries, silicon steel is usually produced via various steps, e.g., rolling of Fe-Si sheets, coating with nonconductive layers and stacking the coated sheets.…”

Section: Introductionmentioning

confidence: 99%

Structure Design of Soft Magnetic Materials Using Electron‐Beam‐Based Additive Manufacturing

Yang

Körner

2023

Advanced Materials

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Fe93.5Si6.5 (wt%) soft magnetic materials in toroidal shape are additively manufactured by means of electron beam powder bed fusion (PBF‐EB). Different hatching strategies are applied to realize specific patterns of molten material alternating with non‐molten powder particles. The specimens produced using different hatching strategies show identical relative densities but various structural features resulting in different magnetic properties. The magnetic performance of the specimens is characterized by determining hysteresis loops (B–H curves), power losses, and maximum magnetic flux density at frequencies between 50 and 1000 Hz. At constant mass, the different structures induced by using various hatching strategies have a strong influence on the hysteresis losses. These losses can be significantly reduced by applying a targeted structure design. The modified specimens show superior magnetic properties at sub‐kHz compared to some soft magnetic materials fabricated by means of conventional methods and laser powder bed fusion (PBF‐L).

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“…Fe-Ni intermetallics, such as FeNi 3 , are considered as another essential soft magnetic material. The ternary Fe-Ni-Si soft magnetic parts [20][21][22] were manufactured by SLM using nickel coated high silicon steel powder. The coated commercial powder combines the advantages of chemical homogeneity and low cost, compared with the pre-alloyed powder and powder mixture.…”

mentioning

confidence: 99%

Controllable mesostructure, magnetic properties of soft magnetic Fe-Ni-Si by using selective laser melting from nickel coated high silicon steel powder

Kang

Mansori

Guittonneau

et al. 2018

Applied Surface Science

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Si soft magnetic parts, using Ni coated high silicon steel powder, were manufactured by selective laser melting process. The type of defect changes from porosity to cracks and the relative density increases, from 50% to 99%, with the decreasing laser scanning speed. The microstructural analyses indicate that the low laser scanning speed fully melted the nickel coating and high-silicon steel core. The EBSD study showed that the separated island and lamellar mesostructures appeared on the top and side view respectively. Moreover, no apparent texture were observed. The magnetization saturation of SLM processed sample decreased, as the laser scanning speed was increased. Consequently, the magnetic properties of SLM processed Fe-Ni-Si alloy also showed anisotropic feature in building and scanning directions, which can be attributed to their different mesostructure.

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Investigation of temperature dependent magnetization and elastic modulus in Si-doped Fe65Ni35 invar alloys

Cited by 8 publications

References 15 publications

Effect of Al doping on the magnetic and elastic properties of Fe65Ni35Invar alloys

Effect of Al doping on the magnetic and elastic properties of Fe65Ni35Invar alloys

Structure Design of Soft Magnetic Materials Using Electron‐Beam‐Based Additive Manufacturing

Controllable mesostructure, magnetic properties of soft magnetic Fe-Ni-Si by using selective laser melting from nickel coated high silicon steel powder

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