The origin of high-saturation magnetization in Co-Zr-C melt-spun ribbons

Effects of Mo additive on structure and magnetic properties of Co82Zr18 alloy

“…We can see that the thermomagnetic curve exhibits a single magnetic transition near 450 • C. It is clear that the Zr 18 Co 77 Mo 5 melt-spun ribbons consist a single Co 5 Zr phase. The Curie temperature 450 • C is lower than that of the binary Co 5 Zr phase (T C = 500 • C) in Co-Zr-B alloys [5]. Similar results have been observed in Co-Zr-B-Si alloys [8].…”

“…We find that the substitution of Co by the relatively larger atomic radius Mo leads to an increase of the Co 5 Zr phase lattice constants from a = 0.6711 nm to a = 0.6793 nm by the analysis of X-ray data of Zr 18 Co 82−x Mo x (x = 1-5) melt-spun ribbons. It has been reported that the XRD patterns of Co 82 Zr 18 melt-spun ribbon (the surface velocity of 40 m/s) and of that annealed consist of Co 11 Zr 2 , Co 2 Zr, fcc-Co, Co 23 Zr 6 and Co 5 Zr phase [5]. However, only the Co 5 Zr phase is found in the investigated Zr 18 Co 77 Mo 5 meltspun ribbon.…”

“…One of the candidates for the new permanent magnetic materials is Co-Zr system alloys [1]. In recently years, several works to improve the magnetic properties of Co-Zr system alloys have been made by optimizing the annealing conditions of rapidly quenched melt-spun ribbons [2][3][4][5]. The reported maximum energy products of Co-Zr-B melt-spun ribbon are comparable to those of the hard ferrites [6,7].…”

“…However, the rapidly quenched Co-Zr-based alloys with higher Zr concentration (near 18 at% Zr) have a good hard magnetic property. Previous studies on Co-Zr system alloys were mostly performed by small atomic radius elements additions, such as B and C [5]. In this research, we will study the structure and magnetic properties of Zr 18 Co 82−x Mo x (1 ≤ x ≤ 5) melt-spun ribbons by doping the rela- * Corresponding author.…”

Microstructures and Magnetic Properties of Annealed Zr–Co Alloys

“…Furthermore, the thermal behaviors of these two structures have not been deeply investigated although the cooling rate strongly affected the magnetic properties [8][9][10]. In current, many researches have focused to increase the hard magnetic properties of the Zr2Co11 alloy through adding additional substitutional or interstitial elements for modifying the lattice parameter and changing the alloy composition of as-spun ribbons [11][12][13][14]. However, there is few papers on the annealing behaviors of asquenched ribbons that affect the crystallinity and the grain size of the Zr2Co11 phase.…”