(NdDy)2(FeNb)14B/α-Fe Nanocomposite Permanent Alloys

Wang Zuocheng; Zhang Maocai; Qiao Yi; Li Fobiao; Zhou Shouzeng; Wang Run

doi:10.13374/j.issn1001-053x.1997.01.015

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Article Navigation > Chinese Journal of Engineering > 1997 > 19(1): 75-78

Wang Zuocheng, Zhang Maocai, Qiao Yi, Li Fobiao, Zhou Shouzeng, Wang Run. (NdDy)2(FeNb)14B/α-Fe Nanocomposite Permanent Alloys[J]. Chinese Journal of Engineering, 1997, 19(1): 75-78. doi: 10.13374/j.issn1001-053x.1997.01.015

Citation:

Wang Zuocheng, Zhang Maocai, Qiao Yi, Li Fobiao, Zhou Shouzeng, Wang Run. (NdDy)₂(FeNb)₁₄B/α-Fe Nanocomposite Permanent Alloys[J]. Chinese Journal of Engineering, 1997, 19(1): 75-78. doi: 10.13374/j.issn1001-053x.1997.01.015

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(NdDy)₂(FeNb)₁₄B/α-Fe Nanocomposite Permanent Alloys

doi: 10.13374/j.issn1001-053x.1997.01.015

1. State Key Laboratory for Advanced Metals and Materials, UST Beijing, Beijing 100083, China;
2. Materials Science and Engineering School, UST Beijing

Received Date: 1996-09-19
Available Online: 2021-08-27

Abstract

Abstract

High coercivity, high remanence, and high energy product (NdDy)₂(FeNb)₁₄B/α-Fe nanocrystalline alloys are prepared by melt spining and subsequent annealing. The best properties of remanence (B_r), coercivity (H_ci) and maximum energy product ((BH)_max) are 1.02 T, 702 kA/m and 134 kJ/m³, respectively. The microstructure of the two phase nanocomposite consists of hard magnetic (NdDy)₂(FeNb)₁₄B and soft magnetic α-Fe with an average size of 30 nm. These small dimensions allow effective exchange coupling between hard and soft magnetic grains and result in the simultaneous enhancement of B_r,H_ci and (BH)_max.
- nanocomposite permanent magnets,
- exchange coupling,
- remanence enhancement