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The effects of Nb on the microstructure and magnetic properties of(Nd_(0.9)Dy_(0.1))_(9.5)Fe_(79-x)Co_5Nb_xB_(6.5)(x=0,1)nanocomposite magnets were investigated.A free and uniform microstructure was achieved for the ribbons annealed at 710℃for 4 min,enhancing the interaction coupling between grains and improving the magnetic properties.The results of three-dimensional atom probe(3DAP)indicated that Fe-Nb-B inter- granular phase existed at the grain boundaries,suppressing the grain growth during the crystallization process.The coercivity was improved from 224 to 643 kA/m for the modification of the microstructure,
The effects of Nb on the microstructure and magnetic properties of (Nd_ (0.9) Dy_ (0.1)) _9.5 (79-x) Co_5Nb_xB_ (6.5) (x = 0,1) nanocomposite magnets were investigated. uniform microstructure was achieved for the ribbons annealed at 710 ° C for 4 min, enhancing the interaction coupling between grains and improving the magnetic properties. The results of three-dimensional atom probe (3DAP) indicated that Fe-Nb-B inter-granular phase existed at the grain boundaries, suppressing the grain growth during the crystallization process. The coercivity was improved from 224 to 643 kA / m for the modification of the microstructure,