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

fYear

2015

fDate

11-15 May 2015

Firstpage

1

Lastpage

1

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, Pr_34.4Co_65.6 alloy powder was blended with Nd-Fe-B master alloy powder using dual-alloy method. The effects of Pr_34.4Co_65.6 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;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference (INTERMAG), 2015 IEEE

Conference_Location

Beijing

Print_ISBN

978-1-4799-7321-7

Type

conf

DOI

10.1109/INTMAG.2015.7156597

Filename

7156597