Microstructure and growth kinetics of nitrided zone in plasma-nitrided Fe-Cr alloys

Goro Miyamoto, Atsushi Yonemoto, Yusuke Tanaka, Tadashi Maki, Tadashi Furuhara

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Microstructure and growth kinetics of the nitrided zone have been examined in various Fe-Cr binary alloys ranging from 1 to 30mass% Cr that had been plasma-nitrided at temperatures between 743 and 943 K. CrN precipitates form under all the nitriding conditions. With increasing Cr content or decreasing nitriding temperature, the morphology of CrN precipitates changes drastically from continuous precipitation with a fine disk-shaped morphology to CrN lamellar precipitation. In addition, small amounts of Cr2N form when the Cr content and the nitriding temperature are high. In spite of the different manners of Cr-nitride precipitation, the thickness of the nitrided zone is approximately proportional to the square root of the nitriding period. Furthermore, in most of the alloys the activation energies for the overall growth kinetics of the nitrided zone are nearly constant.

本文言語English
ページ(範囲)1491-1496
ページ数6
ジャーナルIsij International
47
10
DOI
出版ステータスPublished - 2007

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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