Abstract
Although iron nitride coatings are applied for their good tribological properties, their thermodynamic stabilities are unknown in the temperature range in which they are used. We have investigated the ɛ and γ’ nitride phases between 0 and 350 °C with ion implantation and find evidence that while the ɛ- with x≥2/3 is stable, γ’-N is not. At T≤150 °C, ion irradiation converts γ-N into ɛ-, with x=0.5. This ɛ nitride can then be transformed back into γ’-N by annealing at temperatures of 150 °C and higher. Ion irradiation assists this process as well.
- Received 24 January 1994
DOI:https://doi.org/10.1103/PhysRevLett.72.3835
©1994 American Physical Society