Intrinsic magnetic properties of Nd16Fe72-xCoxC11B carbides

• Published in: Journal of magnetism and magnetic materials Vol. 223; no. 3; pp. 273 - 278
• Main Authors: PADUANI, C, RIVOIRARD, S, SOUBEYROUX, J.-L, DE RANGO, P, TOURNIER, R
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Science 01-02-2001; Elsevier
• Subjects: Applied sciences; Condensed Matter; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Materials Science; Metals. Metallurgy; Permanent magnets; Physics; Studies of specific magnetic materials; Magnetization; Composition effect; Magnetic hysteresis; Permanent magnets; XRD; Experimental study; Neodymium alloys; Boron alloys; Multi-element alloys; Carbon alloys; Coercive force; Microstructure; Cobalt alloys; Iron base alloys; Remanence; carbides; rare-earth; permanent magnets; transition metal
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/S0304-8853(00)01277-4

An investigation of the magnetic properties of the Nd16Fe72-xCoxC11B series is described. The as-cast alloys show the coexistence in equilibrium of the Nd2Fe14C phase together with secondary phases, such as alpha -Fe and the very corrosive chi (hexagonal) phase. After one week of heat treatment, the main 2:14:1 phase in the alloys is verified. It is verified that the addition of 1 at % B reduces the presence of a-Fe in this compound, whereas the substitution of Co for Fe causes an increase of the critical temperature. For x = 10 a maximum is observed in both the remanence and coercivity, at 4kG and 3 kOe, respectively.