(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

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

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.

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