Structural and magnetic properties of nanocrystalline NiFeCuMo powders produced by wet mechanical alloying

Neamţu, B.V.; Isnard, O.; Chicinaş, Ionel; Pop, V.

doi:10.1016/j.jallcom.2010.12.126

Cited by 22 publications

(5 citation statements)

References 24 publications

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“…This thermal phenomenon can be classified as a typical thermal reaction of as-milled powder particles. It is also noted that similar exothermic phenomena caused by distortion energy release are found in some other as-milled alloy powders [32][33][34]. As shown in Figure 8, when the temperature continues to rise, there is no other thermal phenomenon on the powder after 2 h milling, indicating that it still maintains the initial phase components after the DSC run, whereas for both those milled for 20 and 40 h, an extra exothermic peak is obvious.…”

Section: Thermal Stability Of the As-milled Powderssupporting

confidence: 72%

Microstructural Evolution, Thermal Stability and Microhardness of the Nb–Ti–Si-Based Alloy during Mechanical Alloying

Zhang¹,

Guo²

2018

Metals

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Amorphization of the Nb-20Ti-15Si-5Cr-3Hf-3Al (at %) alloy is realized by mechanical alloying (MA). The amorphous phase formation and microstructural evolution are investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). During ball milling, the phase constituent of the alloy powder exhibits a transition from most supersaturated Nb-based solid solutions (Nbss) and a small amount of amorphous phases (after 20 h of ball milling) to a completely amorphous state (after milling for 40 h), which is accompanied by evolution of the powder morphology from flakes to aggregates and eventually to refined granules. The thermal stability of the milled amorphous powders is studied using differential scanning calorimetry (DSC). With the increase of heating temperature, the distortion energy stored during ball milling is released, followed by a transformation from amorphous phase to Nbss and γ-Nb 5 Si 3 phases. In addition, the Vickers microhardness remarkably increases, as a result of the amorphous phase formation in the matrix.

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Section: Thermal Stability Of the As-milled Powderssupporting

confidence: 72%

Microstructural Evolution, Thermal Stability and Microhardness of the Nb–Ti–Si-Based Alloy during Mechanical Alloying

Zhang¹,

Guo²

2018

Metals

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“…Fe-Si alloys with high Si content can be produced by various methods such as: magnetron sputtering, rapid quenching, physical vapour deposition, co-injection, spray forming, or mechanical alloying [6][7][8]. Among the above mentioned methods, the mechanical alloying is a non-equilibrium technique suitable for producing a large range of materials especially in nanocrystalline/nanosized state [4,[9][10][11][12][13][14]. The process consists in a high energy ball mill in which elemental powder mixtures repeatedly cold-weld, fracture and weld again in order to produce alloys [9,10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of the Fe-10%Si Nanocrystalline Powder by Mechanical Alloying

Stanciu

Marinca

Popa

et al. 2014

SSP

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Fe-Si alloy with a Si content of 10 wt. % was obtained in nanocrystalline state by mechanical alloying of elemental iron and silicon powders. The mechanical alloying process was carried out in a high energy ball mill (Fritsch, Pulverisette 4) in argon atmosphere. The X-ray diffraction (XRD) studies indicated that after 4 hours of milling the Fe-Si alloy is formed. The mean crystallites size decreases down to 7 nm after 8 hours of milling. The particles morphology investigated by scanning electron microscopy (SEM) showed an evolution during milling process from two different kinds of particles to a one kind of particles with irregular shape. The magnetisation of powders decreases upon increasing the milling time up to 4 hours as a consequence of the Fe-Si alloy formation.

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“…Mechanical milling is a useful powder processing technique that can produce a variety of equilibrium and nonequilibrium alloy phases [2,3]. Some researches concerning NiFe, NiFeMo powders system produced by mechanical milling were reported in [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Isobaric Thermal Expansion and Isothermal Compression of Powdered NiFe Based Alloys Studied by In-Situ EDXRD

et al. 2014

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The aim of the present work was to study the isothermal compression and isobaric thermal expansion behaviour of ball-milled NiFe (81 wt.% of Ni) and NiFeMo (79 wt.% of Ni, 16 wt.% of Fe) alloy and follow its phase evolution when exposed to high pressure and temperature. In-situ pressuretemperature energy dispersive X-ray (EDXRD) diraction experiments were performed at the MAX80 instrument (beamline F2.1). The compressibility of NiFe alloy at 400• C was evaluated for pressure values of up to 3.5 GPa. The EDXRD spectra revealed the presence of cubic FeNi3 phase as determined from the shift of (111), (200) and (220) reection lines in corresponding EDXRD spectra.

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Structural and magnetic properties of nanocrystalline NiFeCuMo powders produced by wet mechanical alloying

Cited by 22 publications

References 24 publications

Microstructural Evolution, Thermal Stability and Microhardness of the Nb–Ti–Si-Based Alloy during Mechanical Alloying

Microstructural Evolution, Thermal Stability and Microhardness of the Nb–Ti–Si-Based Alloy during Mechanical Alloying

Synthesis of the Fe-10%Si Nanocrystalline Powder by Mechanical Alloying

Isobaric Thermal Expansion and Isothermal Compression of Powdered NiFe Based Alloys Studied by In-Situ EDXRD

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