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Temperature-dependent structural and magnetic properties of mechanically alloyed Ni80Co17Mo3 powder mixture

Rafai, H. ; Smili, B. ; Sakher, E. ; Sakmeche, M. ; Chadli, S. ; Tigrine, R. ; Pesci, R. ; Bououdina, M. ; Bellucci, S.

Journal of alloys and compounds, 2024-09, Vol.999, Article 174981 [Periódico revisado por pares]

Elsevier B.V

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  • Título:
    Temperature-dependent structural and magnetic properties of mechanically alloyed Ni80Co17Mo3 powder mixture
  • Autor: Rafai, H. ; Smili, B. ; Sakher, E. ; Sakmeche, M. ; Chadli, S. ; Tigrine, R. ; Pesci, R. ; Bououdina, M. ; Bellucci, S.
  • Assuntos: Engineering Sciences ; Materials ; Mechanosynthesis ; Nanomaterials ; Scanning Electron Microscopy ; Vibrating-sample magnetometer ; X-ray diffraction
  • É parte de: Journal of alloys and compounds, 2024-09, Vol.999, Article 174981
  • Descrição: Nanostructured materials containing nickel improve the effectiveness of several applications. This study examines the preparation and characterization of nanostructured Ni80Co17Mo3 alloy powders using high-energy mechanical alloying and subsequent annealing. A 72 h milling process used pure elemental powders to synthesise nanocrystalline FCC-NiCo(Mo) solid solution. The milled powders were then subjected to annealing at different temperatures:300°C, 500°C, and 750°C. X-ray diffraction, scanning electron microscopy coupled with energy-dispersive spectroscopy, and vibrating sample magnetometry indicated significant changes in the powdered alloy properties. The particles growth occurred as the annealing temperature increased, while the microstrain decreased significantly; 14.30±0.07 nm up to 56.30±0.28 nm and 0.680±0.003% up to 0.180±0.001%, at 25°C and 750°C respectively. SEM analysis revealed differences in particle size and shape as milling progressed. Surprisingly, the milled powdered alloy displayed improved magnetic properties, manifesting significant magnetic susceptibility and enhanced saturation magnetisation, remanent magnetisation, and coercivity within the temperature range of 300°C to 750°C. These findings indicate the development of a consistent and structured state, accompanied by significant crystal growth due to the annealing temperature. This study highlights the great importance of high-energy mechanical milling and subsequent annealing to tune / tailor the characteristics and subsequently investigate the potential utilization of nanostructured Ni-based alloys. [Display omitted] •The Ni80Co17Mo3 solid phase with a face-centred cubic (FCC) structure was generated after 12 h of milling.•Temperature-Induced Microstructural Evolution•The magnetization of Ni80Co17Mo3 decreases gradually with increasing at Elevated Temperatures.•The presence of nanocrystalline defects, namely stacking faults, causes a decrease in Hc.•The nanostructured Ni80Co17Mo3 material has a very pliable magnetic behaviour after it reaches saturation.
  • Editor: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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