Title:
Bulk nanocomposite magnets produced by dynamic shock compaction
Bulk nanocomposite magnets produced by dynamic shock compaction
Author(s)
Chen, K. H.
Jin, Z. Q.
Li, Jing
Kennedy, G.
Wang, Z. L. (Zhong Lin)
Thadhani, Naresh N.
Zeng, Hao
Cheng, S.-F.
Liu, J. Ping
Jin, Z. Q.
Li, Jing
Kennedy, G.
Wang, Z. L. (Zhong Lin)
Thadhani, Naresh N.
Zeng, Hao
Cheng, S.-F.
Liu, J. Ping
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Abstract
Exchange-coupled R₂Fe₁₄B/α -Fe (R = Nd or Pr) nanocomposite bulk magnets with nearly full density have been successfully produced by shock compaction of melt-spun powders. X-ray diffraction and transmission electronic microscopy analyses of the shock-consolidated compacts showed no grain growth upon compaction, in fact, a decrease in the crystallite size of both the hard and soft phases was observed. As a consequence, magnetic properties were retained and even improved after compaction. Hysteresis loops of the shock-consolidated powder compacts showed a smooth single-phaselike behavior, indicating effective exchange coupling between hard and soft magnetic phases.
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Date Issued
2004-07-15
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Article