Ion-nitriding of an Fe-19 wt % Cr alloy

Jun Takada, Yuusuke Ohizumi, Hiroshi Miyamura, Hideyuki Kuwahara, Shiomi Kikuchi, Imao Tamura

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

The ion-nitriding behaviour of an Fe-18.75wt% Cr alloy was investigated at 803 K under constant plasma conditions. Both a thin surface layer of γ′-Fe4N and an internal-nitriding layer were observed. The nitride formed in the internal-nitriding layer was found to be CrN, rather than Cr2N. The hardness of the nitriding layer rises to Hv=1200 due to small CrN precipitates. The growth rate of the internal nitriding layer, in the present alloy is controlled by a nitrogen diffusion process in the matrix metal, α-iron. Because such ion-nitriding behaviour is analogous to that of internal-oxidation, the growth rate of nitriding was discussed according to the rate equation to that of internal-oxidation. The nitrogen diffusion in the present alloy is scarcely affected by the CrN precipitates.

Original languageEnglish
Pages (from-to)2493-2496
Number of pages4
JournalJournal of Materials Science
Volume21
Issue number7
DOIs
Publication statusPublished - Jul 1986
Externally publishedYes

Fingerprint

nitriding
Nitriding
Ions
ions
Internal oxidation
Precipitates
precipitates
Nitrogen
nitrogen
oxidation
Nitrides
nitrides
surface layers
hardness
Iron
Metals
Hardness
Plasmas
iron
matrices

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)

Cite this

Takada, J., Ohizumi, Y., Miyamura, H., Kuwahara, H., Kikuchi, S., & Tamura, I. (1986). Ion-nitriding of an Fe-19 wt % Cr alloy. Journal of Materials Science, 21(7), 2493-2496. https://doi.org/10.1007/BF01114296

Ion-nitriding of an Fe-19 wt % Cr alloy. / Takada, Jun; Ohizumi, Yuusuke; Miyamura, Hiroshi; Kuwahara, Hideyuki; Kikuchi, Shiomi; Tamura, Imao.

In: Journal of Materials Science, Vol. 21, No. 7, 07.1986, p. 2493-2496.

Research output: Contribution to journalArticle

Takada, J, Ohizumi, Y, Miyamura, H, Kuwahara, H, Kikuchi, S & Tamura, I 1986, 'Ion-nitriding of an Fe-19 wt % Cr alloy', Journal of Materials Science, vol. 21, no. 7, pp. 2493-2496. https://doi.org/10.1007/BF01114296
Takada J, Ohizumi Y, Miyamura H, Kuwahara H, Kikuchi S, Tamura I. Ion-nitriding of an Fe-19 wt % Cr alloy. Journal of Materials Science. 1986 Jul;21(7):2493-2496. https://doi.org/10.1007/BF01114296
Takada, Jun ; Ohizumi, Yuusuke ; Miyamura, Hiroshi ; Kuwahara, Hideyuki ; Kikuchi, Shiomi ; Tamura, Imao. / Ion-nitriding of an Fe-19 wt % Cr alloy. In: Journal of Materials Science. 1986 ; Vol. 21, No. 7. pp. 2493-2496.
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