Journal of Material Science and Technology · 2009 · 10 citations · 0 references
Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsMetallic MaterialsMetallurgyFerromagnetic MaterialsFerromagnetismMagnetic Properties Of SolidsMagnetism In SolidsPowder MetallurgySinteringFerrite MagnetsMagnetic Materials CharacterizationNdfeb MagnetsPowder Metallurgy Of MagnetsPowder SinteringSintered Magnets
To reduce the sensitivity of grain growth to sintering temperature for improving property consistency of sintered Nd–Fe–B magnets, combined additions of Zr and Nb were investigated. It was found that when Zr content was increased to 0.07 at. pct, abnormal grain growth was effectively hindered even when the sintering temperature reached 1100◦C. With combined additions of 0.07 at. pct Zr and 0.07 at. pct Nb, the sensitivity of grain growth to sintering temperature was greatly reduced. The magnets sintered at 1100◦C showed higher property consistency than the magnets containing no Zr and Nb. In addition, the magnetic properties of magnets were also improved.