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PIII nitriding of fcc‐alloys containing Ni and Cr
Author(s) -
Lutz Johanna,
Gerlach Jürgen W.,
Mändl Stephan
Publication year - 2008
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200778329
Subject(s) - nitriding , austenite , materials science , metallurgy , corrosion , layer (electronics) , diffusion , nitrogen , austenitic stainless steel , microstructure , composite material , chemistry , thermodynamics , physics , organic chemistry
Face‐centred cubic (fcc) alloys such as austenitic stainless steel, Ni base alloys and Co base alloys are important materials with a high corrosion resistance. Nitrogen insertion by PIII into all these alloys at moderate temperatures leads to the formation of an expanded austenite structure. A similar activation energy for the thermally assisted diffusion of about 0.75 eV was found for steel and CoCr alloys with CrN precipitates beyond 400 °C in both systems. However, a double layer structure was observed for CoCr, similar to Ni alloys, in contrast to a single layer for austenitic steel. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)