TY - JOUR
T1 - Evaluation of the diffusion coefficient of nitrogen in Fe 4 N 1-x nitride layers during microwave post-discharge nitriding
AU - Campos, I.
AU - Torres, R.
AU - Bautista, O.
AU - Ramírez, G.
AU - Zuñiga, L.
N1 - Funding Information:
This work has been supported by a research grant no. 42883/A-1 of Consejo Nacional de Ciencia y Tecnologia at Mexico. I. Campos thanks the “Cátedra de Investigación en Materiales” chair supported by Centro Regional de Investigacion en Materiales of the Sistema Tecnologico de Monterrey.
PY - 2005/8/15
Y1 - 2005/8/15
N2 - The evaluation of the growth kinetics of Fe 4 N 1-x (γ′) phase under microwave post-discharge nitriding in ARMCO iron has been carried out through this project. A mathematical model that considers the iron nitride growth is proposed in a non-saturated nitrogen medium with a finite length of 2L, where the interface concentrations remain constant during the treatment. Growth kinetics of γ′, during microwave post-discharge nitriding process, is rapid in short times of treatment, due to the presence of neutral and ionized species, which produce a rapid evolution of nitrogen concentration on the substrate surface. Concentration on the surface is controlled by the parameters of the process for γ′ nitride formation. Experimental results achieved during the process are compared to the mathematical model forecast, along with the results presented by other authors.
AB - The evaluation of the growth kinetics of Fe 4 N 1-x (γ′) phase under microwave post-discharge nitriding in ARMCO iron has been carried out through this project. A mathematical model that considers the iron nitride growth is proposed in a non-saturated nitrogen medium with a finite length of 2L, where the interface concentrations remain constant during the treatment. Growth kinetics of γ′, during microwave post-discharge nitriding process, is rapid in short times of treatment, due to the presence of neutral and ionized species, which produce a rapid evolution of nitrogen concentration on the substrate surface. Concentration on the surface is controlled by the parameters of the process for γ′ nitride formation. Experimental results achieved during the process are compared to the mathematical model forecast, along with the results presented by other authors.
KW - Diffusion coefficient
KW - Growth kinetics
KW - Nitride layer
KW - Nitriding
KW - Post-discharge
UR - http://www.scopus.com/inward/record.url?scp=21244435972&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2004.11.029
DO - 10.1016/j.apsusc.2004.11.029
M3 - Artículo
SN - 0169-4332
VL - 249
SP - 54
EP - 59
JO - Applied Surface Science
JF - Applied Surface Science
IS - 1-4
ER -