Morphology and constitution of the compound layer formed on nitrided Fe–4wt.%V alloy

✍ Scribed by Santosh S. Hosmani; Ralf E. Schacherl; Eric J. Mittemeijer

• Book ID: 106394467
• Publisher: Springer
• Year: 2009
• Tongue: English
• Weight: 610 KB
• Volume: 44
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/s10853-008-3090-3

✦ Synopsis

The microstructure of the compound (“white”) layer formed on the surface of Fe–4wt.%V alloy, by nitriding in a gas mixture of ammonia and hydrogen at 580 °C, has been investigated by employing light and scanning electron microscopy, X-ray diffraction and electron probe microanalysis. The compound layer is dominantly composed of γ^|^-Fe~4~N nitride. Quantitative analysis of the composition data demonstrated that V is present in the compound layer as VN precipitates, i.e. V is not taken up significantly in (Fe, V) nitrides. A mechanism for compound-layer formation has been proposed.