Structure, magnetic and Mössbauer studies of mechanically alloyed Fe–20wt.% Ni powders

Hamzaoui, Rabah; Elkedim, O.; Gaffet, Éric; Grenèche, Jean‐Marc

doi:10.1016/j.jallcom.2005.09.064

Cited by 46 publications

(11 citation statements)

References 35 publications

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“…Indeed, strain through inverse magnetostriction (magneto-elastic effects) may induce an anisotropy which contributes to the value of the coercivity. In fact, many authors have discussed this effect [22,36,37], i.e., that internal strain can be the dominating factor in the coercivity which leads to an increase of H C with milling time, rather than the usual effect of grain size reduction where it is found that H C decreases with decreasing grain size (thus with increasing milling time). …”

Section: The Magnetization Curvesmentioning

confidence: 99%

X-ray diffraction, microstructure, Mössbauer and magnetization studies of nanostructured Fe50Ni50 alloy prepared by mechanical alloying

Guittoum

Layadi

Bourzami

et al. 2008

Journal of Magnetism and Magnetic Materials

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Section: The Magnetization Curvesmentioning

confidence: 99%

X-ray diffraction, microstructure, Mössbauer and magnetization studies of nanostructured Fe50Ni50 alloy prepared by mechanical alloying

Guittoum

Layadi

Bourzami

et al. 2008

Journal of Magnetism and Magnetic Materials

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“…Hence the variation of H c in these two samples was small. So the higher value of magnetization in this alloy, as compared to conventional FeNiCoTi alloy [2], is attributed to nanoscale crystallite size in which each grain may be treated as a single magnetic domain eliminating the effects of magnetic walls [14,16].…”

Section: Mechanical Alloyingmentioning

confidence: 97%

Synthesis of FeNiCoTi Powder Alloy by Mechanical Alloying and Investigation of Magnetic and Shape Memory Properties

Gheiratmand

Hosseini

2012

J Supercond Nov Magn

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FeNiCo base powder alloy with nominal composition Fe-27Ni-17Co-4Ti (wt%) was prepared from elemental powders by mechanical alloying. The structure of milled powders was characterized by XRD and SEM. The effect of nanosize structure on magnetic properties and shape memory behavior was studied using VSM and DSC. After milling for 240 minutes by high energy vibrational ball mill under argon atmosphere, supersaturated solid solution formed with mean crystallite size of ∼20 nm. Results of VSM examinations showed that by milling for 240 minutes saturation magnetization and intrinsic coercivity reached 304 emu/gr and 21 Oe, respectively. XRD analyses made it clear that transformation from BCC to FCC phase has occurred after annealing supersaturated milled powder at 650°C for 60 minutes. DSC curves indicated that martensite transformation in this alloy was suppressed due to refinement of the microstructure.

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“…This can be attributed to the presence of a nonmagnetic P element within the -Fe(P) solid solution in the powder mixtures which acts like an air gap, as a source of demagnetizing field causing the existence of very mobile domain walls. As consequence, the maximum permeability value increases, since it is reported that the permeability is sensitive to the microstructure and thereby can be affected by the shape of the particles, density, porosity and strongly depends on the grain size [64,65]. It is well-known that addition of P increases the permeability while decreases the coercivity [66,67].…”

Section: Magnetic Propertiesmentioning

confidence: 98%

Dependence of Magnetic Properties with Structural/Microstructural Parameters of Ball-milled Fe15Co2P3 Powder Mixture

Berkani¹,

Siab²,

Tebib³

et al. 2021

Preprint

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This research work aims to investigate the mechanically alloyed Fe15Co2P3. Parametric Rietveld refinement method, of the obtained X-ray patterns, was performed for qualitative and quantitative phase analysis, structural, microstructural and mechanical properties. The ball-milled powder mixture crystallized within the face-centred cubic α-Fe(P) solid solution in equilibrium with Co75Fe25 phase. The crystallite size decreases reaching 100 and 200 nm respectively after 3h of milling. The highest values of the dislocation density, microstain and stored energy are registered for the α-Fe(P) solid solution. The studied mechanical properties manifest the brittle nature of the α-Fe(P) solid solution compared to the Co75Fe25 phase. The squareness ratio Mr/Ms and the coercivity values of the milled powders increase with increasing milling time and reach steady state after 2 h. The hysteresis loss energy and maximum permeability reach minimal values of 45*10− 4 W/m3 and 49*10− 3 H/m respectively, after 1 h of milling at the opposite of the switching field distribution.

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Structure, magnetic and Mössbauer studies of mechanically alloyed Fe–20wt.% Ni powders

Cited by 46 publications

References 35 publications

X-ray diffraction, microstructure, Mössbauer and magnetization studies of nanostructured Fe50Ni50 alloy prepared by mechanical alloying

X-ray diffraction, microstructure, Mössbauer and magnetization studies of nanostructured Fe50Ni50 alloy prepared by mechanical alloying

Synthesis of FeNiCoTi Powder Alloy by Mechanical Alloying and Investigation of Magnetic and Shape Memory Properties

Dependence of Magnetic Properties with Structural/Microstructural Parameters of Ball-milled Fe15Co2P3 Powder Mixture

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