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Chinese Journal of High Pressure Physics  > 2011  >  25(1): 29-35 .
WU Jun-Ying, CHEN Lang, LI Wei, FENG Chang-Gen. Experimental Study on Shock Wave Demagnetization of Nd2Fe14B Hard Ferromagnetic[J]. Chinese Journal of High Pressure Physics, 2011, 25(1): 29-35 . doi: 10.11858/gywlxb.2011.01.005
Citation: WU Jun-Ying, CHEN Lang, LI Wei, FENG Chang-Gen. Experimental Study on Shock Wave Demagnetization of Nd2Fe14B Hard Ferromagnetic[J]. Chinese Journal of High Pressure Physics, 2011, 25(1): 29-35 . doi: 10.11858/gywlxb.2011.01.005
shu

Experimental Study on Shock Wave Demagnetization of Nd2Fe14B Hard Ferromagnetic

doi: 10.11858/gywlxb.2011.01.005
  • 1.

    State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;

  • 2.

    Military Representative Office of Naval Equipment Department in Chongqing, Chongqing 400042, China

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  • Corresponding author: WU Jun-Ying
  • Received Date: 31 May 2010
  • Rev Recd Date: 22 Aug 2010
  • Publish Date: 15 Feb 2011
    Abstract
  • For the study of the demagnetization performance of Nd2Fe14B ferromagnetic under shock wave loading, the plane shock wave loading experiment device was established, and the shock demagnetization experiments were conducted. The electromotive forces were measured, and the shock demagnetization time and pulse width were obtained. The demagnetization rates with different shock wave pressures were discussed, and the effects of magnet sizes on the electromotive force were analyzed. The results show that the time is about 0.28 s between the shock wave loading Nd2Fe14B ferromagnetic and shock demagnetization occurring. The critical pressure of demagnetization is lower than 8.52 GPa. The electromotive force increases with the increase of the magnet diameter and the decrease of the magnet height.

     

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