Nd-Fe-B MELT - SPUN POWDER QUALITY ESTIMATION BASED ON STONER - WOHLFARTH MODEL

M. TAKATA, NGUYEN VAN VUONG, DOAN MINH THUY, NGUYEN TRUNG HIEU, LE TUAN TU
Author affiliations

Authors

  • M. TAKATA
  • NGUYEN VAN VUONG
  • DOAN MINH THUY
  • NGUYEN TRUNG HIEU
  • LE TUAN TU

DOI:

https://doi.org/10.15625/0868-3166/V14No1.17

Abstract

The squareness factor, defined as the ratio BH c / i H c , plays very importance role. This factor reflects the magnetization process under a reversed magnetic field in magnet. So the factor can be used as the critical parameter for estimating the magnet quality. For the powder compaction of 6.48 g/cm 3 mass density, if is less than 0.48 then the preparation conditions were far from the optimal ones. The value higher than 0.48 of factor proves that in prepared powder the coupling between grains is enhanced. From the theory and the experiments it was proved that for full dense compaction of NdFeB Stoner-Wohlfarth particles the squareness factor and the maximum energy product(BH)max can not be lager than 0.53 and 10.7 MG. Oe, respectively.

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Published

15-04-2007

How to Cite

[1]
M. TAKATA, N. V. VUONG, D. M. THUY, N. T. HIEU, and L. T. TU, “Nd-Fe-B MELT - SPUN POWDER QUALITY ESTIMATION BASED ON STONER - WOHLFARTH MODEL”, Comm. Phys., vol. 14, no. 1, p. 36, Apr. 2007.

Issue

Vol. 14 No. 1 (2004)

Section

Papers

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