文献类型：期刊文献

英文题名：Polycrystalline Nd2Fe14B/alpha-Fe nanocomposite flakes with a sub-micro/nanometre thickness prepared by surfactant-assisted high-energy ball milling

作者：Tang, Xin[1];Chen, Xi[2];Chen, Renjie[1];Yan, Aru[1]

第一作者：Tang, Xin

通讯作者：Tang, X[1]

机构：[1]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China;[2]Xinxiang Univ, Mech & Elect Engn Coll, Xinxiang 453003, Henan, Peoples R China

第一机构：Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China

通讯机构：[1]corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China.

年份：2015

卷号：644

起止页码：562-569

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000357143900082)】；

语种：英文

外文关键词：Anisotropic Nd2Fe14B/alpha-Fe; Nanocomposite magnet; Surfactant-assisted high-energy ball milling; Texture; Anisotropy; Preferential cleavage planes

摘要：A surfactant-assisted high-energy ball milling technique was employed to synthesize Nd2Fe14B/alpha-Fe nanoparticles and nanoflakes from melt-spun nanocrystalline powders. The microstructure evolution in ball milling process was investigated. In the beginning stage (0-4 h) of ball milling, raw powders were crushed into micrometre-sized particles. While flakes were mainly formed by reducing thickness of particles via peeling layer by layer along preferential planes in the late stage (8-16 h). The selected area electron diffraction and high-resolution transmission electron microscopy images show that preferential cleavage planes are basal planes. With ball milling proceeding, more and more defects were induced by ball milling. As a result, the coercivity and remanence decreased to 1.6 kOe and 3.2 kGs, respectively. After 16 h ball milling, the exchange decoupling occurred due to severe amorphorization. A weakly-textured nanocomposite magnet was fabricated after 12 h ball milling and the anisotropy in magnetic properties can be further improved by employing settling down process to select particle size and aligning particles in external field. (C) 2015 Elsevier B.V. All rights reserved.