Structure and energy of the (101) twin boundary in hot-deformed Nd-Fe-B magnets

Tieqiao Zhang; Wandong Xing; Fugang Chen; Lanting Zhang; Rong Yu

doi:10.1016/j.matchar.2021.111380

Structure and energy of the (101) twin boundary in hot-deformed Nd-Fe-B magnets

Tieqiao Zhang
, Wandong Xing
, Fugang Chen
, Lanting Zhang
, Rong Yu^*

^*Corresponding author for this work

Tsinghua University
Jiangsu University of Science and Technology
Shanghai Jiao Tong University

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Revealing the atomic structure and energy of twin boundaries in compounds has been a challenge, especially for compounds with complex crystal structure such as the tetragonal Nd₂Fe₁₄B phase in Nd-Fe-B magnets. In this paper, a large number of (101) twin boundaries were observed in grain-coarsening regions of hot-deformed Nd-Fe-B magnets. The atomic structure and twin boundary energy of the (101) twin boundaries were investigated based on the atomic-scale high-angle annular dark field scanning transmission electron microscopy observation and first-principles calculations. The (101) twin boundary has a considerably low energy of 0.008 J/m². The mechanism of twin-assisted grain coarsening was proposed.

Original language	English
Article number	111380
Journal	Materials Characterization
Volume	179
DOIs	https://doi.org/10.1016/j.matchar.2021.111380
State	Published - Sep 2021
Externally published	Yes

Keywords

First-principles calculations
Growth twins
Hot-deformed Nd-Fe-B
Scanning transmission electron microscopy
Twin boundary
Twin boundary energy

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10.1016/j.matchar.2021.111380

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title = "Structure and energy of the (101) twin boundary in hot-deformed Nd-Fe-B magnets",

abstract = "Revealing the atomic structure and energy of twin boundaries in compounds has been a challenge, especially for compounds with complex crystal structure such as the tetragonal Nd2Fe14B phase in Nd-Fe-B magnets. In this paper, a large number of (101) twin boundaries were observed in grain-coarsening regions of hot-deformed Nd-Fe-B magnets. The atomic structure and twin boundary energy of the (101) twin boundaries were investigated based on the atomic-scale high-angle annular dark field scanning transmission electron microscopy observation and first-principles calculations. The (101) twin boundary has a considerably low energy of 0.008 J/m2. The mechanism of twin-assisted grain coarsening was proposed.",

keywords = "First-principles calculations, Growth twins, Hot-deformed Nd-Fe-B, Scanning transmission electron microscopy, Twin boundary, Twin boundary energy",

author = "Tieqiao Zhang and Wandong Xing and Fugang Chen and Lanting Zhang and Rong Yu",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Inc.",

year = "2021",

month = sep,

doi = "10.1016/j.matchar.2021.111380",

language = "英语",

volume = "179",

journal = "Materials Characterization",

issn = "1044-5803",

publisher = "Elsevier Inc.",

}

TY - JOUR

T1 - Structure and energy of the (101) twin boundary in hot-deformed Nd-Fe-B magnets

AU - Zhang, Tieqiao

AU - Xing, Wandong

AU - Chen, Fugang

AU - Zhang, Lanting

AU - Yu, Rong

PY - 2021/9

Y1 - 2021/9

N2 - Revealing the atomic structure and energy of twin boundaries in compounds has been a challenge, especially for compounds with complex crystal structure such as the tetragonal Nd2Fe14B phase in Nd-Fe-B magnets. In this paper, a large number of (101) twin boundaries were observed in grain-coarsening regions of hot-deformed Nd-Fe-B magnets. The atomic structure and twin boundary energy of the (101) twin boundaries were investigated based on the atomic-scale high-angle annular dark field scanning transmission electron microscopy observation and first-principles calculations. The (101) twin boundary has a considerably low energy of 0.008 J/m2. The mechanism of twin-assisted grain coarsening was proposed.

AB - Revealing the atomic structure and energy of twin boundaries in compounds has been a challenge, especially for compounds with complex crystal structure such as the tetragonal Nd2Fe14B phase in Nd-Fe-B magnets. In this paper, a large number of (101) twin boundaries were observed in grain-coarsening regions of hot-deformed Nd-Fe-B magnets. The atomic structure and twin boundary energy of the (101) twin boundaries were investigated based on the atomic-scale high-angle annular dark field scanning transmission electron microscopy observation and first-principles calculations. The (101) twin boundary has a considerably low energy of 0.008 J/m2. The mechanism of twin-assisted grain coarsening was proposed.

KW - First-principles calculations

KW - Growth twins

KW - Hot-deformed Nd-Fe-B

KW - Scanning transmission electron microscopy

KW - Twin boundary

KW - Twin boundary energy

UR - https://www.scopus.com/pages/publications/85112754751

U2 - 10.1016/j.matchar.2021.111380

DO - 10.1016/j.matchar.2021.111380

M3 - 文章

AN - SCOPUS:85112754751

SN - 1044-5803

VL - 179

JO - Materials Characterization

JF - Materials Characterization

M1 - 111380

ER -

Structure and energy of the (101) twin boundary in hot-deformed Nd-Fe-B magnets

Abstract

Keywords

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