Title :
Enhanced corrosion resistance of sintered NdFeB magnets by diffusion of Co film prepared by direct current magnetron sputtering deposition
Author :
Di, J. ; Guo, S. ; Cai, L. ; Chen, L. ; Ding, G. ; Liu, J. ; Yan, A.
Author_Institution :
Zhejiang Province Key Lab. of Magn. Mater. & Applic. Technol., Ningbo Inst. of Mater. Technol. & Eng., Ningbo, China
Abstract :
In this study, the Co films were prepared by direct current (DC) magnetron sputtering deposition onto the substrates of sintered NdFeB magnets (N46) which were made by conventional powder metallurgy route. Magnetic properties, grain boundary and corrosion resistance were observed for the heat treated magnets. Highly accelerated stress test, energy-dispersive X-ray spectroscopy, SEM, TEM and electron back-scattering pattern method were employed to study the surface morphology and grain boundary phase modification by Co diffusion on the surface of the magnets.
Keywords :
X-ray chemical analysis; boron alloys; cobalt; corrosion resistance; electron backscattering; grain boundary diffusion; heat treatment; iron alloys; mechanical testing; neodymium alloys; permanent magnets; scanning electron microscopy; sputter deposition; surface morphology; transmission electron microscopy; Co-NdFeB; SEM; TEM; cobalt film diffusion; corrosion resistance; direct current magnetron sputtering deposition; electron back-scattering pattern method; energy-dispersive X-ray spectroscopy; grain boundary phase modification; heat treatment; highly accelerated stress test; magnetic properties; powder metallurgy; sintered N46 magnets; surface morphology; Corrosion; Grain boundaries; Magnetic films; Magnetic resonance imaging; Magnetomechanical effects; Resistance;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7156669
