Influence of Co, Ga and Si on the microstructure and the magnetic properties for nanocomposite permanent alloys

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Vol. 95; no. 2; pp. 187 - 190
• Main Authors: Gao, R.W., Liu, H.Q., Feng, W.C., Chen, W., Wang, B., Han, G.B., Zhang, P.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2002; Elsevier
• Subjects: Coercivity; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties; Magnetic properties and materials; Magnetic properties of nanostructures; Microstructure; Nanocomposite permanent alloys; Permanent magnets; Physics; Studies of specific magnetic materials; Trace elements; Trace elements; Nanocomposite permanent alloys; Microstructure; Coercivity; Magnetic properties; Grain size; Annealing; Curie point; Magnetization; Crystallization; Doping; Magnetic hysteresis; Permanent magnets; Experimental study; Gallium additions; Silicon additions; Residual impurity; Coercive force; Nanocomposite; Cobalt additions; Exchange interactions; Transition element alloys; Iron base alloys
• ISSN: 0921-5107; 1873-4944
• DOI: 10.1016/S0921-5107(02)00230-1

The influence of addition trace elements Co, Ga and Si on the microstructure and the magnetic properties of nanocomposite permanent alloys based on Fe 3B are investigated. The experimental results show that in comparison to the ternary component (Nd–Fe–B) nanocomposite permanent alloy, the crystallization temperature was decreased, the Curie temperature was increased, the mean grain size of annealed samples was decreased and the exchange coupling interaction between the grains was enhanced for the nanocomposite permanent alloy with these addition elements. These variations cause both coercivity and remanent magnetic induction to increase to different degrees, and so the maximum magnetic energy product of nanocomposite increases.