Effect of rapid quenching speeds on phase structure and magnetic properties of melt-spun Sm(Co,Fe,Cu,Zr)7.5 ribbons

Sm12Co59Cu6Fe20Zr3 sintered magnets made from as-cast alloy and melt-spun ribbons

“…It has been reported that Sm(Co, Fe, Cu, Zr) z (z = 7.4-8.0) ribbons meltspun at speeds of 5-53 m/s all consist of a TbCu 7 -type structure, whereas a cellular microstructure similar to that of traditional sintered magnets is obtained after annealing. The coercivity of 4.74-28.1 kOe at room temperature and 0.53 T at 500 • C of such ribbons was obtained [11][12][13][14][15][16][17][18]. Goll et al [19] reported that by applying to ribbons an annealing procedure similar to that of sintered magnets, an analogous cellular microstructure can be obtained, which also leads to an abnormal temperature dependence of coercivity.…”

Effect of Fe on the structure and magnetic properties of Sm–Co–Cu–Fe–Zr melt-spun ribbons

“…The coercivity can approach 37 kOe and preferred texture is found. Chen et al [23] and Sun et al [24] also discovered that evident orientation degree exists in Sm(Co 0.68 Cu 0.07 Fe 0.22 Zr 0.03 ) 7.5 melt-spun ribbons.…”

Phase constitution, evolution and correlation with magnetic performance in nominal SmCo9.8 alloy

“…Thus the high-Co Sm-Co alloy containing single phase can hardly be prepared by the conventional methods starting with the stoichiometric composition. At present, the melt spinning and mechanical alloying are the representative methods to prepare Sm-Co alloys with metastable phases, which have been used successfully to obtain the nanocrystalline alloy with metastable SmCo 7 phase [11][12][13]. However, it is difficult to extend these methods to prepare single-phase Sm-Co binary alloys with even higher Co content, because the agglomeration of Co often occurs during the processing.…”