Melthyphen;spun Nd2(CoxFe1minus;x)14B systems: Optimization of the hard magnetic properties

摘要

By appropriate variation of starting composition we demonstrate that melthyphen;spun materials comprised primarily of Nd2(CoxFe1minus;x)14B and having optimum energy products can be prepared. Twelve cobalt concentrations spanning the entire cobalt substitution range have been investigated. We report ambient as well as elevated temperature magnetic properties. A spin reorientation characterized by a change of easy magnetization direction from thecaxis to the basal plane of the Nd2Fe14B structure occurs at a temperatureTsforxgsim;0.65. In that concentration range the technological properties are limited byTsrather than the Curie temperatureTc.