Title :
Improvement of the thermal stability of sintered Nd-Fe-B magnets by intergranular addition of Pr34.4Co65.6
Author :
Jin, C. ; Chen, R. ; Yin, W. ; Tang, X. ; Wang, Z. ; Yan, A. ; Lee, D.
Author_Institution :
Key Lab. of Magn. Mater. & Devices, Ningbo Inst. of Mater. Technol. & Enginnering, Ningbo, China
Abstract :
Due to excellent magnetic properties, sintered Nd-Fe-B magnets have been used in various fields for many years [1, 2]. However, Nd-Fe-B magnets show a relatively low temperature stability of performance which is a main disadvantage for the application in some special cases. In order to improve the temperature stability of performance, Co, Dy and Tb elements have been added to the Nd-Fe-B sintered magnets [2, 3]. It should be pointed out that the addition of heavy rare earth (Tb, Dy) leads to a drastic reduction of the saturation magnetization. In the present work, Pr34.4Co65.6 alloy powder was blended with Nd-Fe-B master alloy powder using dual-alloy method. The effects of Pr34.4Co65.6 powder on the thermal stability of properties and the microstructure were investigated in details.
Keywords :
boron alloys; cobalt alloys; crystal microstructure; iron alloys; magnetisation; neodymium alloys; powder technology; praseodymium alloys; sintering; thermal stability; dual-alloy method; heavy rare earth; intergranular addition; low temperature stability; master alloy powder; microstructure; saturation magnetization; sintered magnets; thermal stability; Magnetic resonance imaging; Perpendicular magnetic anisotropy; Powders; Saturation magnetization; Temperature; Thermal stability;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7156597
