Nitridation of iron by pulsed excimer laser treatment under liquid ammonia: Mössbauer spectroscopic study

Abstract

Iron is nitrided by pulsed excimer laser treatment under liquid ammonia. Conversion electron Mössbauer spectroscopy and small-angle x-ray diffraction measurements reveal formation of γ-austenite in the as-treated sample and its transformation to γ′-Fe4N upon thermal annealing.