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- W2892340370 abstract "Nanocomposite Nd 4-x Tb x Fe 83.5 Co 5 Cu 0.5 Nb 1 B 6 (x=0 and 1) ribbons were prepared by melt spinning technique with constant wheel speed of 40 m/s. The samples have been annealed in an evacuated quartz tube using a pressure of around 10 -5 mbar for 10 minutes at different crystallization temperatures like 675°C, 687°C, 700°C, 712°C and 725°C which are found by differential scanning calorimetry (DSC). Crystallization behavior was studied by X-ray diffraction (XRD) using CuK α radiation (1.5418A). The ribbon samples were also characterized by vibrating sample magnetometer (VSM). Highest value of H c has been obtained as 1.06 kOe for the sample of composition Nd 4-x Tb x Fe 83.5 Co 5 Cu 0.5 Nb 1 B 6 (x=0) annealed at 700°C for 10 min. At 700°C maximum energy product (BH) max and remanent ratio (M r /M s ) have been found to be 2.55 MGOe and 0.61 respectively. Higher Tb substitution has significantly reduced the value of coercivity (H c ) and maximum energy product (BH) max . The M-H hysteresis loops show extremely soft natures which do not possess any area. However, with the annealing of the samples in the above mentioned temperature evolution of large coercivity was observed due to the formation of exchange couple hard and soft nanocrystal composites." @default.
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- W2892340370 date "2018-09-01" @default.
- W2892340370 modified "2023-10-16" @default.
- W2892340370 title "Enhancement of Coercivity and Maximum Energy Product of Annealed Nd-Fe-B Nanocomposite Alloys" @default.
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