TY - JOUR
T1 - Fractal dimension determined through optical and scanning electron microscopy on FeCrAl alloy after polishing, erosion, and oxidizing processes
AU - Guzmán-Castañeda, J. I.
AU - García-Bórquez, A.
AU - Arizabalo-Salas, R. D.
PY - 2012/6
Y1 - 2012/6
N2 - Optical and scanning electron microscopy (OM and SEM) are techniques that are normally used for 2D-analysis of surface features. By fractal dimension analysis of the gray-scale OM and SEM images, it is possible to get quantitative topographical measurements. In this work, three different surface topographies (polished, eroded, and oxidized) were analyzed on FeCrAl alloy by OM and SEM. Clear surface topographical changes can be qualitatively observed. In order to quantify such changes, two steps were followed: (i) a gray-scale digitalization from each image was used to reproduce topographical features on the analyzed surface, and (ii) from this information, the fractal dimension (D) was determined using fractal3e software. The fractal dimension determined in this form follows coherently the topographical changes produced on the FeCrAl alloy after polishing, erosion, and oxidizing processes. The variations of fractal dimension values against the temperature of the oxidizing processes reflect well the oxide growth changes. Moreover, a minimum D-value is registered at 750°C, which corresponds to the δ-θ alumina phase transition temperature as determined by differential thermal analysis (DTA) on the same alloy.
AB - Optical and scanning electron microscopy (OM and SEM) are techniques that are normally used for 2D-analysis of surface features. By fractal dimension analysis of the gray-scale OM and SEM images, it is possible to get quantitative topographical measurements. In this work, three different surface topographies (polished, eroded, and oxidized) were analyzed on FeCrAl alloy by OM and SEM. Clear surface topographical changes can be qualitatively observed. In order to quantify such changes, two steps were followed: (i) a gray-scale digitalization from each image was used to reproduce topographical features on the analyzed surface, and (ii) from this information, the fractal dimension (D) was determined using fractal3e software. The fractal dimension determined in this form follows coherently the topographical changes produced on the FeCrAl alloy after polishing, erosion, and oxidizing processes. The variations of fractal dimension values against the temperature of the oxidizing processes reflect well the oxide growth changes. Moreover, a minimum D-value is registered at 750°C, which corresponds to the δ-θ alumina phase transition temperature as determined by differential thermal analysis (DTA) on the same alloy.
KW - FeCrAl alloy
KW - Fractal dimension
KW - Gray-scale
KW - SEM
KW - Surface roughness
UR - http://www.scopus.com/inward/record.url?scp=84862194007&partnerID=8YFLogxK
U2 - 10.1002/pssb.201100806
DO - 10.1002/pssb.201100806
M3 - Artículo
SN - 0370-1972
VL - 249
SP - 1224
EP - 1228
JO - physica status solidi (b)
JF - physica status solidi (b)
IS - 6
ER -