XRD analysis and magnetic properties of nanocrystalline Ni20Co80 alloys

Bensebaa, N.; Loudjani, N.; Alleg, S.; Dekhil, L.; Suñol, J.J.; Sae, M. Al; Bououdina, M.

doi:10.1016/j.jmmm.2013.08.045

Cited by 21 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Bragg reflections in the starting sample of milling powder mixture illustrated all the diffraction peaks correspond to elemental Fe, Si and P, except boron. The boron exception is because of its small content, low X-ray scattering factor and its amorphous state [21]. By increasing the milling time, only the Bragg reflections from an Fe based solid solution were observed.…”

Section: Resultsmentioning

confidence: 99%

Magnetic and Thermal Studies of Iron-Based Amorphous Alloys Produced by a Combination of Melt-Spinning and Ball Milling

Razzaghi

Kianvash

Tutunchi

2021

AMR

View full text Add to dashboard Cite

In this study, we demonstrate the synthesis of an Fe78Si9B10P3 amorphous alloy by three pathways: mechanical alloying, melt-spinning and a combination of melt-spinning and ball milling. Microstructure, thermal stability and soft magnetic properties of the melt-spun and mechanically alloyed powders are comparatively studied. Ball milling of previously melt-spun samples led to an amorphous powder with an average particle size of ~2.4 μm after 20 hrs of milling. Mechanical alloying of elemental Fe-Si-B-P powders in a planetary ball mill for up to 100 hrs led only to a partial amorphisation of powder with a median particle size of ~1.3 μm. Differential thermal analysis of the amorphous ribbon revealed that the amorphous phase was stable up to ~520 °C, at which the crystallization process occurred. The melt spun ribbons exhibited excellent soft ferromagnetic behavior, including high saturation magnetization (Ms) of ~171 emu/g and a low coercivity (Hc) of ~2.8 Oe. In the 20 hrs milled ribbons, due to a probable partial anisotropy which induced by ball milling stress, the Ms value decreased slightly to ~161 emu/g but the Hc increased to ~38 Oe. The mechanically alloyed samples present a relatively lower Ms of ~154 emu/g and higher Hc of ~43 Oe. It is to be noted that the milling of ribbons is usually inevitable due to their technological restrictions in use.

show abstract

Section: Resultsmentioning

confidence: 99%

Magnetic and Thermal Studies of Iron-Based Amorphous Alloys Produced by a Combination of Melt-Spinning and Ball Milling

Razzaghi

Kianvash

Tutunchi

2021

AMR

View full text Add to dashboard Cite

show abstract

“…It is observed that a gradual increase the square ratio Mr/Ms to reach a value of around 0.068 after 4 h milling, then decreases rapidly from 0.064 at 8 h to 0.05 at 32 h. The increase in Mr/Ms observed after 4 h of milling is linked to the irreversible displacement of the walls of magnetic domains following the creation of a important rate of defects of different types (dislocations, grain boundaries, etc.). The Mr/Ms ratio obtained possesses lower values (between 0.05 and 0.068)for all samples treated by MA, can be attributed to small magnetic particles, which are usually single domains [50][51][52][53].It is important to mention that for materials intended for magnetic recording medium,the required value of Mr/Ms is close to 1, while for some applications like transformers/electromagnet core, the preferred value is close to 0. This is because of the Mr/Ms value close to 1 or 0 indicate that most of the magnetic material retains its magnetisation or not even after removing the magnetic eld [10,54].…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Study on morphological, structural and magnetic properties of nanocrystalline Fe60Al35Mg5 alloy fabricated by high energy ball milling

Hafs¹,

Hafs

Berdjane

et al. 2023

Preprint

View full text Add to dashboard Cite

The mechanical alloying process has been used to synthesise the nanocrystalline Fe60Al35Mg5 ( wt % )powders in a high energy planetary ball-mill Retsch PM 400. The evolution structural, microstructural, morphological and magnetic properties of ball-milled powders at different milling times (t variation from 0 to 32 h) were investigated by X-ray diffraction using the MAUD program which is based on the Rietveld method, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX) and the vibrating sample magnetometer (VSM). The XRD results reveal the formation of a bcc-Fe (Al, Mg) solid solution after 8 h of milling possessing a lattice parameter of 0,2895nm after 32 h of milling. It is also observed a refinement of the grain size which reaches 18,75 nm, and an increase in the microstrain after 32 hours of milling. Morphological evolution of the powder particles of the preceding mixture with the increase of the milling time, shows the coexistence of larger and fine particles at the beginning of the milling process linked to the competition of the phenomena of fractures and welding. A more or less homogeneous distribution of the particle shape is observed after 32 hours of milling. The elemental maps of Fe , Al and Mg done with EDX experiments confirmed the results found by XRD about the evolution of the alloy formation. Magnetic measurements of the milled Fe60Al35Mg5 ( wt % ) powder mixture exhibit a soft ferromagnetic character where the magnetic parameters are found to be very sensitive to the milling time mainly due to the particle size refinement as well as the formation of the solid solutions. After 32 hours of milling, the evolution of the saturation magnetisation (MS), coercive field (HC) remanent magnetisation (Mr) and squareness ratio (Mr/Ms) derived from the hysteresis curves are discussed as a function of milling time.

show abstract

“…This fact can be explained by the interaction between the metallic atoms which are ferromagnetic with Si and B atoms that are non-ferromagnetic in nature [28,29]. In other way, the fragmentation of the magnetic particles during the milling process leads to a heterogeneous ferromagnetic system where the Fe-rich ferromagnetic grains are separated by Si-rich and B-rich phases.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

The Effect of B and Si Additions on the Structural and Magnetic Behavior of Fe-Co-Ni Alloy Prepared by High-energy Mechanical Milling

Khitouni

Daly

Escoda

et al. 2020

J Supercond Nov Magn

View full text Add to dashboard Cite

We investigate the structural and magnetic properties of nancrystalline Fe50Co25Ni15X10 (X=Bamorphous, Bcrystalline and Si) alloy powders prepared by mechanical alloying process.Morphological, microstructural and structural characterizations of the powders milled several times were investigated by scanning electron microscopy and X-ray diffraction. The final metallurgical state strongly depends on the chemical composition and the grinding time; it can be single-phase or two-phase. The crystallite size reduction down the nanometer scale is accompanied by the introduction of high level of lattice strains. The dissolution of Co, Ni, B (amorphous and crystalline) and Si into the α-Fe lattice leads to the formation of highly disordered Fe-based solid solutions. Coercivity (Hc) and the saturation magnetization (Ms) of alloyed powders were measured at room temperature by a vibration sample magnetization.The magnetic measurements show a contrasting Ms and (Hc) in all alloy compositions. Conclusively, soft magnetic properties of nanocrystalline alloys are related to various factors such as metalloids addition, formed phases and chemical compositions.

show abstract

XRD analysis and magnetic properties of nanocrystalline Ni20Co80 alloys

Cited by 21 publications

References 25 publications

Magnetic and Thermal Studies of Iron-Based Amorphous Alloys Produced by a Combination of Melt-Spinning and Ball Milling

Magnetic and Thermal Studies of Iron-Based Amorphous Alloys Produced by a Combination of Melt-Spinning and Ball Milling

Study on morphological, structural and magnetic properties of nanocrystalline Fe60Al35Mg5 alloy fabricated by high energy ball milling

The Effect of B and Si Additions on the Structural and Magnetic Behavior of Fe-Co-Ni Alloy Prepared by High-energy Mechanical Milling

Contact Info

Product

Resources

About