Corroded microstructure of HDDR-NdFeB magnetic powders

Zhu, Ling yun; Itakura, Masaru; Tomokiyo, Yoshitsugu; Kuwano, Noriyuki; Machida, K.

doi:10.1016/j.jmmm.2004.02.003

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…5). The broad ring of the spacing of 0.3 nm, which cannot be explained by the structure of a-Fe, was attributed to h-Nd 2 O 3 by Zhu et al [10]. However, most of spacings of h-Nd 2 O 3, as drawn by dashed semi-cycles in Fig.…”

Section: Article In Pressmentioning

confidence: 82%

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In situ TEM study of Nd-rich phase in NdFeB magnet

Wang

2005

Journal of Magnetism and Magnetic Materials

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Hot stage in transmission electron microscope has been used to study the structure and stability of Nd-rich phase in NdFeB magnet. The present observation shows that the so-called complex cubic phase is in fact the prototype of Mn 2 O 3 (space group Ia 3) with lattice parameter of a ¼ 1:08 nm: The Nd-rich phase with P 3m1 structure (h-Nd 2 O 3 ) was first observed to be transformed from the BCC phase after in situ heating over 400 1C. The orientation relationship between these two structures satisfies as follows: (0 0 0 1) HCP //(2 0 0) BCC , ð10 1 0Þ HCP ==ð0 2 0Þ BCC ; ½ 1 2 1 0 HCP ==½0 0 1 BCC : It is argued that the h-Nd 2 O 3 was arising from the oxidation of the BCC Nd-rich phase rather than from Nd 2 Fe l4 B matrix phase as suggested in the literature. r

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Section: Article In Pressmentioning

confidence: 82%

“…This reaction was supported by the recent TEM work on selected area electron diffraction pattern [10]. In contrast, Li et al [11] found that the product of Nd-rich phase from matrix phase (Nd 2 Fe l4 B) was amorphous on high-resolution electron microscopy (HREM).…”

Section: Introductionmentioning

confidence: 87%

In situ TEM study of Nd-rich phase in NdFeB magnet

Wang

2005

Journal of Magnetism and Magnetic Materials

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“…Economical issues also recommend the improvement in the mechanical properties of magnets and increase in their resistance to the corrosive environment. These materials are used for many precision and costly devices, so improvement in their mechanical properties and corrosion resistance is connected with extending the life of both the magnets and the devices [2,[10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Bonded magnets with polymer binding are characteristic of the dielectric properties and may be used in direct neighbourhood of the fast-changing magnetic fields and power losses occur in them resulting from the eddy currents [1,4,[7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%