Microstructural, Hyperfine, and Magnetic Properties of FeSiBCuNb Deposits

S. Alleg (1) , L. Hamza (1) , M. Ibrir (2) , S. Souilah (1) , W. Tebib (1) , N. Fenineche (3) , Jean-Marc Greneche (4)

1 UBMA - Université Badji Mokhtar [Annaba]
2 Uni M'sila - University of M'sila / Université Mohamed Boudiaf - M'sila
3 IRTES - LERMPS - Laboratoire d'Études et de Recherches sur les Matériaux, les Procédés et les Surfaces
4 IMMM - Institut des Molécules et Matériaux du Mans

Mechanically alloyed Fe73.5Si13.5 B 9Nb3Cu1 powders were used as feedstock materials for depositing nano/amorphous coatings by high-velocity oxy-fuel thermal spraying process. Morphology, structure, microstructure, hyperfine, and magnetic properties have been investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Mössbauer spectrometry, and vibrating sample magnetometer. The coating structure consists of bcc Fe(B)-type, bcc Fe(Si)-type, and amorphous phases. The crystallite sizes of Fe(Si) and Fe(B) solid solutions increase after spraying to about (72–82) and (48–81) nm, respectively. The Mössbauer spectrometry results reveal the presence of Fe2B boride. The squareness ratio M r/ M s and the coercivity values of the coatings decrease with increasing the number of passes.

Mots clés: Nanostructure; HVOF; Coatings; X-ray diffraction; Magnetic properties

Domaines: Matière Condensée [cond-mat]; Physique [physics]

S. Alleg, L. Hamza, M. Ibrir, S. Souilah, W. Tebib, et al.. Microstructural, Hyperfine, and Magnetic Properties of FeSiBCuNb Deposits. Journal of Superconductivity and Novel Magnetism, 2015, 28 (8), pp.2431-2439. ⟨10.1007/s10948-015-3038-1⟩. ⟨hal-02269421⟩