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author:

Liang, Huidong (Liang, Huidong.) [1] | Zheng, Hanjie (Zheng, Hanjie.) [2] | Yang, Hao (Yang, Hao.) [3] | Wang, Chen (Wang, Chen.) [4] (Scholars:王晨) | Chen, Junfeng (Chen, Junfeng.) [5] (Scholars:陈俊锋) | Wang, Bingshu (Wang, Bingshu.) [6] (Scholars:汪炳叔)

Indexed by:

EI Scopus PKU CSCD

Abstract:

The bulk nanocrystalline magnets of Nd8.5Fe65.5Ti2ZrNbB22-xNx(x=0-2, at%) in the rod form with 2 mm diameter were prepared by copper mold suction casting. The effects of nitrogen addition on the microstructure, room-temperature and high-temperature magnetic properties, and corrosion resistance of the samples were studied. It is shown that the N addition can refine the grains, inhibit the formation of Nd19Fe68B68 phase, and promote the formation of Nd2Fe14B permanent magnetic phase. Thus, the magnetic properties, thermal stability and corrosion resis-tance of the samples are significantly improved. The sample with x=1 exhibited the best room-temperature and high-temperature magnetic properties, and the best corrosion resistance. As compared to the sample with x=0, the intrinsic coercivity iHc, the remanence Br and the maximum energy product (BH)max of the sample with x=1 at room temperature increased by 70.6%, 14.6% and 100.0%, respectively. At the same time, in the temperature range of 25-180, the absolute values of the temperature coefficients α and β for the remanence and coercivity decrease by 36.1% and 19.7%, respectively. The flux irreversible loss in the temperature range of 25-250 increases from -30.8%/K for the sample with x=0 to -19.6%/K for the sample with x=1. Furthermore, as x increases from 0 to 1, the corrosion potential Ecorr increases from -0.979 V to -0.784 V, and the corrosion current density Icorr decreases from 1.054×10-4 A/cm2 to 1.736×10-5 A/cm2. © 2020, Materials Review Magazine. All right reserved.

Keyword:

Corrosion resistance High temperature corrosion Iron alloys Magnetic properties Nanocrystals Neodymium alloys Nitrogen Permanent magnets Remanence

Community:

  • [ 1 ] [Liang, Huidong]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350108, China
  • [ 2 ] [Zheng, Hanjie]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350108, China
  • [ 3 ] [Yang, Hao]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350108, China
  • [ 4 ] [Wang, Chen]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350108, China
  • [ 5 ] [Chen, Junfeng]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350108, China
  • [ 6 ] [Wang, Bingshu]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350108, China

Reprint 's Address:

  • 王晨

    [wang, chen]college of materials science and engineering, fuzhou university, fuzhou; 350108, china

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Source :

Materials Reports

ISSN: 1005-023X

CN: 50-1078/TB

Year: 2020

Issue: 4

Volume: 34

Page: 08025-08030

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

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