The source of free iron in zinc-bonded permanent magnets based on Sm(2)Fe(17)N(x)

• Published in: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 29; no. 6; pp. 2830 - 2832
• Main Authors: Reinsch, B, Stadelmaier, H H, Petzow, G
• Format: Journal Article Conference Proceeding
• Language: English
• Published: United States 01.11.1993
• Subjects: 420200 > Engineering > Facilities, Equipment, & Techniques; ALLOYS; CHEMICAL COMPOSITION; COHERENT SCATTERING; DATA; DIFFRACTION; ELEMENTS; ENGINEERING; EXPERIMENTAL DATA; INFORMATION; IRON; IRON ALLOYS; IRON BASE ALLOYS; IRON-ALPHA; MAGNETIC MATERIALS; MAGNETIC PROPERTIES; MAGNETS; MATERIALS; MATERIALS SCIENCE; METALS; NITROGEN ADDITIONS; NUMERICAL DATA; PERMANENT MAGNETS; PHASE STUDIES; PHYSICAL PROPERTIES; RARE EARTH ALLOYS; SAMARIUM ALLOYS; SCATTERING; TRANSITION ELEMENTS 360102 > Metals & Alloys > Structure & Phase Studies; X-RAY DIFFRACTION
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/20.281067

The principal phase resulting from the reaction of Sm(2)Fe(17) with zinc is a solution of Sm in Gamma-Fe-Zn. At the maximum Sm content, this cubic phase with alpha=0.8984 nm has an approximate composition of (at.%) 5 Sm, 42 Fe, 53 Zn, and has no permanent magnetic moment between 4.2 and 600 K. The phase equilibria of the low-Sm alloys in Sm-Fe-Zn show that isostructural Sm(2)Fe(17) and Sm(2)Zn(17 ) are not miscible and that, because of the pervasiveness of equilibria with alpha-Fe, it will be difficult to eliminate alpha-Fe completely from Zn bonded magnets