Shock consolidation of Sm-Fe-N magnetic powders and magnetic properties

A. Chiba, K. Ooyabu, Y. Morizono, T. Maeda, S. Sugimoto, T. Kozuka, E. Kakimoto, K. Kawahara, T. Watanabe

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

Sm2Fe17Nx compound is a prospective candidate as a material for high performance permanent magnets because of its good intrinsic magnetic properties with a Curie temperature of 747K, a room-temperature anisotropy field of 14T and a room-temperature saturation magnetization of 1.5T. However, Sm2Fe17Nx compound decomposes to α-Fe and Sm nitride above 873K and conventional powder metallurgy processing techniques fail to meet the processing requirements. Shock consolidation is a viable alternative to process this compound. Fully dense Sm2Fe17Nx bulk materials were fabricated by cylindrical explosive consolidation technique using water as a pressure transmitting medium. Explosive consolidation is performed under cold state and fully dense materials can be obtained without any degradation of the characteristics of the powder states. Sound compacts were obtained without any cracks or teas, and the value of (BH)max of Sm2Fe 17Nx compact is 23.8 MGOe.

Original languageEnglish
Pages (from-to)1037-1040
Number of pages4
JournalMaterials Science Forum
Volume449-452
Issue numberII
DOIs
Publication statusPublished - 2004 Jan 1
EventDesigning, Processing and Properties of Advanced Engineering Materials: Proceedings on the 3rd International Symposium on Designing, Processing and Properties of Advanced Engineering Materials - Jeju Island, Korea, Republic of
Duration: 2003 Nov 52003 Nov 8

Keywords

  • Explosive consolidation
  • Hard magnet
  • Maximum energy product
  • Sm-Fe-N

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Chiba, A., Ooyabu, K., Morizono, Y., Maeda, T., Sugimoto, S., Kozuka, T., Kakimoto, E., Kawahara, K., & Watanabe, T. (2004). Shock consolidation of Sm-Fe-N magnetic powders and magnetic properties. Materials Science Forum, 449-452(II), 1037-1040. https://doi.org/10.4028/www.scientific.net/msf.449-452.1037