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2010 | 12 | 1 | 38-43

Article title

Kinetics of nanocrystalline iron nitriding

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EN

Abstracts

EN
Nitriding of nanocrystalline iron was studied under the atmosphere of pure ammonia and in the mixtures of ammonia - hydrogen - nitrogen at temperatures between 350°C and 500°C using thermogravimetry and x-ray diffraction. Three stages of nitriding were observed and have been ascribed to the following schematic reactions: (1) α-Fe → γ'-Fe4N, (2) γ'- Fe4N → ε - Fe3N and (3) ε - Fe3N → ε - Fe2N. The products of these reactions appeared in the nitrided nanocrystalline iron not sequentially but co-existed at certain reaction ranges. The dependence of a reaction rate for each nitriding stage on partial pressure of ammonia is linear. Moreover, a minimal ammonia partial pressure is required to initiate the nitriding at each stage.

Publisher

Year

Volume

12

Issue

1

Pages

38-43

Physical description

Dates

published
1 - 1 - 2010
online
8 - 4 - 2010

Contributors

  • Institute of Chemical and Environment Engineering, West Pomeranian University of Technology, ul. Pułaskiego 10,70-322 Szczecin, Poland
  • Institute of Chemical and Environment Engineering, West Pomeranian University of Technology, ul. Pułaskiego 10,70-322 Szczecin, Poland
  • Institute of Chemical and Environment Engineering, West Pomeranian University of Technology, ul. Pułaskiego 10,70-322 Szczecin, Poland

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_v10026-010-0008-z
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