Effect of crystal orientation relationship on inducement of anisotropy in HDDR-treated Nd-Fe-B alloys

Author

Sugimoto, Satoshi ; Ohga, Satoshi ; Inomata, Koichiro ; Suzuki, Kentaro ; Konno, Toyohiko ; Hiraga, Kenji

Author_Institution

Dept. of Mater. Sci., Tohoku Univ., Sendai, Japan

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2961

Lastpage

2963

Abstract

Using anisotropic sintered bodies, the crystal orientation relationship between the parent Nd₂Fe₁₄B phase and the disproportionated mixture during the hydrogenation disproportionation desorption recombination (HDDR) treatment was investigated by using X-ray diffraction and transmission electron microscopy. It can be concluded that retaining the crystallographic orientation relationship such as <111>_α-Fe and <111>(NdH₂)//<001>(Nd₂Fe₁₄B), [110]_α-Fe and [110](NdH₂)//[100](Nd₂Fe₁₄B) during HDDR treatment is important for the inducement of anisotropy.

Keywords

X-ray diffraction; boron alloys; crystal orientation; desorption; ferromagnetic materials; hydrogenation; iron alloys; magnetic anisotropy; neodymium alloys; permanent magnets; powder metallurgy; sintering; transmission electron microscopy; HDDR-treated Nd-Fe-B alloys; Nd-Fe-B; Nd₂Fe₁₄B; NdH₂; X-ray diffraction; anisotropic sintered bodies; anisotropy inducement; crystal orientation relationship; disproportionated mixture; high-performance anisotropic bonded magnets; hydrogenation disproportionation desorption recombination; parent Nd₂Fe₁₄B phase; transmission electron microscopy; Anisotropic magnetoresistance; Heat treatment; Hydrogen; Iron alloys; Neodymium; Powders; Production; Transmission electron microscopy; X-ray diffraction; X-ray scattering;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.803079

Filename

1042424