Microstructure and coercivity of nitrided Mn-Sn-based alloys

Masashi Matsuura, Keita Isogai, Keita Shinaji, Nobuki Tezuka, Satoshi Sugimoto

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The microstructure of Mn-Sn-N and Mn-Sn-Co-N alloys was investigated by scanning electron microscopy and transmission electron microscopy (TEM). After the Mn-Sn alloy was annealed at 1000 °C under nitrogen, the coercivity increased to 245 kA m-1 and a lamellar structure appeared. The TEM images showed that the lamellar structure contained twins in the perovskite-type phase. After the Mn-Sn-Co alloy was annealed at 900 °C and subsequently annealed at 500 °C under nitrogen, the coercivity increased dramatically to 1270 kA m-1. A fine two-phase structure consisting of β-Mn and perovskite-type phases was observed, and some twins were present in the perovskite-type phases. In addition, a higher twin density was observed in the Mn-Sn-Co-N alloy than in the Mn-Sn-N alloy. These results indicate that the twins increased the coercivity of nitrided Mn-Sn based alloys.

Original languageEnglish
Pages (from-to)208-212
Number of pages5
JournalJournal of Alloys and Compounds
Publication statusPublished - 2014 Aug 25


  • Coercivity
  • Microstructure
  • Transition metal alloys and compounds
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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