Characterisation of Fe40Ni38B18Mo4 nanomagnetic alloy

Du, S.W.; Ramanujan, R.V.

doi:10.1016/j.msea.2003.10.052

Cited by 18 publications

(16 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The angular spread of the humps was in the range of 15-20°. For crystalline peaks, angular spread should be within 2-3° (Du and Ramanujan 2004). Therefore, the XRD patterns indicated that the as-cast metallic glass was amorphous on both the sides.…”

Section: Characterization Of As-cast Metallic Glassesmentioning

confidence: 99%

Effect of surface morphology on atmospheric corrosion behaviour of Fe-based metallic glass, Fe67Co18Si14B1

et al. 2008

View full text Add to dashboard Cite

Abstract. The nature of atmospheric corrosion behaviour of an as-cast metallic glass, Fe 67 Co 18 Si 1 B 14 ribbon, was evaluated. The wheel side surface of the ribbon was more corroded than the air side surface, due to the higher density of air pockets present. The phases present in atmospheric rust were analysed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) to be goethite, lepidocrocite, magnetite, cobalt oxide and cobalt hydroxide phases. Goethite and lepidocrocite were in amorphous form. The nature of rusting was understood by scanning electron microscopy (SEM). Nucleation of rust started at preferred locations on the surface and grew along the surface in certain directions.

show abstract

Section: Characterization Of As-cast Metallic Glassesmentioning

confidence: 99%

Effect of surface morphology on atmospheric corrosion behaviour of Fe-based metallic glass, Fe67Co18Si14B1

et al. 2008

View full text Add to dashboard Cite

show abstract

“…Our previous studies have shown that amorphous Fe 40 Ni 38 Mo 4 B 18 alloy partially crystallises upon annealing. [23][24][25] In that study the variation of crystal number density with heat treatment time at different heat treatment temperatures was presented. It was revealed that the crystal number density increased with an initial increase in heat treatment time and reached a steady state value after prolonged annealing time.…”

Section: A Structurementioning

confidence: 99%

Magnetocaloric effect in amorphous and partially crystallized Fe40Ni38Mo4B18 alloys

2016

View full text Add to dashboard Cite

A study of magnetocaloric effect in amorphous and partially crystallized Fe40Ni38Mo4B18 alloys is reported. Amorphous Fe40Ni38Mo4B18, near its magnetic ordering temperature (600K) showed a magnetic entropy change ΔSM of 1.1 J/KgK and a relative cooling power of 36J/Kg in a field change of 10 kOe. Amorphous samples were partially crystallized by annealing at 700 K at different time intervals. Partially crystallized samples showed two distinct magnetic ordering temperature, one corresponding to the precipitated FeNi nanocrystals and the other one corresponding to the boron rich amorphous matrix. Magnetic ordering temperature of the residual amorphous matrix got shifted to the lower temperatures on increasing the annealing duration. Partially crystallised samples showed a magnetic entropy change of about 0.27J/kgK near the magnetic ordering temperature of the amorphous matrix (540K) in a field change of 10 kOe. The decrease in ΔSM on partial crystallisation is attributed to the biphasic magnetic nature of the sample.

show abstract

“…Current annealing treatment was carried out in air atmosphere. The above temperatures were selected based on previously reported differential scanning calorimetry (DSC) measurements of Metglas 2826MB [18,19,27] showing two phase 4 transformation peaks at around 420 and 525 °C. The first one (420 °C) is related to the formation of (FeNiMo) 23 B 6 crystalline phase embedded in the amorphous matrix, while the second one (525 °C) is related to the formation of the bcc-(Fe,Ni) ferromagnetic phase.…”

Section: Introductionmentioning

confidence: 99%

Magnetic force microscopy characterization of heat and current treated Fe40Ni38Mo4B18 amorphous ribbons

García¹,

Iturriza²,

Val³

et al. 2010

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

ABSTRACT:The domain structure of a magnetostrictive Fe 40 Ni 38 Mo 4 B 18 amorphous ribbon has been studied using magnetic force microscopy (MFM) at room temperature. First, the evolution of the magnetic domain patterns as a function of the annealing temperature has been investigated. In samples heat treated at 250 and 450 °C for 1 h, a transformation from 90° to 180° domain wall has been clearly observed, while the sample heat treated at 700 °C for 1 h showed a magnetic phase fixed by the crystalline anisotropy. Additionally, the evolution of the magnetic domain structure by applying a DC current was recorded by the MFM technique. For current annealed samples at 1 A for 1, 30 and 60 min, a transformation between different domain patterns has been observed. Finally, in samples treated by the current annealing method under simultaneous stress, an increase of the annealing time gives rise to a different magnetic structure arising from the development of transverse magnetic anisotropy.

show abstract

Characterisation of Fe40Ni38B18Mo4 nanomagnetic alloy

Cited by 18 publications

References 6 publications

Effect of surface morphology on atmospheric corrosion behaviour of Fe-based metallic glass, Fe67Co18Si14B1

Effect of surface morphology on atmospheric corrosion behaviour of Fe-based metallic glass, Fe67Co18Si14B1

Magnetocaloric effect in amorphous and partially crystallized Fe40Ni38Mo4B18 alloys

Magnetic force microscopy characterization of heat and current treated Fe40Ni38Mo4B18 amorphous ribbons

Contact Info

Product

Resources

About