TY - JOUR
T1 - Growth kinetics of boride layers
T2 - A modified approach
AU - Campos-Silva, I.
AU - Ortiz-Domínguez, M.
AU - Villavelázquez, C.
AU - Escobar, R.
AU - López, N.
PY - 2007
Y1 - 2007
N2 - This study evaluates the boron diffusion in the Fe2B phase formed at the surface of AISI 1018 steels during the paste boriding process. The treatment was carried out at temperatures of 1123, 1173, 1223 and 1273 K with 2, 4, 5, 6 and 8 h exposure times for each temperature using a 4 mm layer thickness of boron carbide paste over the material surface. The boron diffusion coefficient DFe2B was determined by the mass balance equation and the boride incubation time assuming that the boride layers obey the parabolic growth law, while the boron concentration profile along the interphase Fe 2B/substrate was unknown. The boron diffusion coefficient was interpreted as a function of the treatment temperature, obtaining the activation energy value for diffusion controlled growth of Fe2B boride phase.
AB - This study evaluates the boron diffusion in the Fe2B phase formed at the surface of AISI 1018 steels during the paste boriding process. The treatment was carried out at temperatures of 1123, 1173, 1223 and 1273 K with 2, 4, 5, 6 and 8 h exposure times for each temperature using a 4 mm layer thickness of boron carbide paste over the material surface. The boron diffusion coefficient DFe2B was determined by the mass balance equation and the boride incubation time assuming that the boride layers obey the parabolic growth law, while the boron concentration profile along the interphase Fe 2B/substrate was unknown. The boron diffusion coefficient was interpreted as a function of the treatment temperature, obtaining the activation energy value for diffusion controlled growth of Fe2B boride phase.
KW - Boride layers
KW - Diffusion coefficient
KW - Growth kinetics
KW - Mass balance equation
KW - Paste boriding process
UR - http://www.scopus.com/inward/record.url?scp=42149089206&partnerID=8YFLogxK
U2 - 10.4028/3-908451-54-X.79
DO - 10.4028/3-908451-54-X.79
M3 - Artículo
SN - 1012-0386
VL - 272
SP - 79
EP - 86
JO - Defect and Diffusion Forum
JF - Defect and Diffusion Forum
ER -