PIII nitriding of fcc-alloys containing Ni and Cr

✍ Scribed by Lutz, Johanna ;Gerlach, Jürgen W. ;Mändl, Stephan

• Book ID: 105364847
• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 729 KB
• Volume: 205
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200778329

✦ Synopsis

Abstract

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)