TY - JOUR
T1 - High-temperature oxidation of Y 2O 3-doped Al 2O 3 matrix composites dispersed with nano-Ni particles
AU - Nanko, Makoto
AU - Maruoka, Daisuke
AU - Sato, Yoku
PY - 2012/1
Y1 - 2012/1
N2 - The oxidation kinetics of Y 2O 3-doped Al 2O 3-based composites dispersed with 5 vol% nano-Ni particles was investigated at temperatures ranging from 1200° to 1350°C in air. The oxidized zone consisted of Al 2O 3 matrix and NiAl 2O 4, which was an oxidation product and a thin surface NiAl 2O 4 layer. The growth of the oxidized zone followed a parabolic manner, which means that mass transport in the oxidized zone was the rate-controlling process. Doping of Y 2O 3 into Al 2O 3 matrix decreases growth rate of the oxidized zone. The value of the apparent activation energy was 681 kJ/mol, which was larger than that of nondoped Ni/Al 2O 3 composites.
AB - The oxidation kinetics of Y 2O 3-doped Al 2O 3-based composites dispersed with 5 vol% nano-Ni particles was investigated at temperatures ranging from 1200° to 1350°C in air. The oxidized zone consisted of Al 2O 3 matrix and NiAl 2O 4, which was an oxidation product and a thin surface NiAl 2O 4 layer. The growth of the oxidized zone followed a parabolic manner, which means that mass transport in the oxidized zone was the rate-controlling process. Doping of Y 2O 3 into Al 2O 3 matrix decreases growth rate of the oxidized zone. The value of the apparent activation energy was 681 kJ/mol, which was larger than that of nondoped Ni/Al 2O 3 composites.
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U2 - 10.1111/j.1744-7402.2011.02640.x
DO - 10.1111/j.1744-7402.2011.02640.x
M3 - Article
AN - SCOPUS:84855977963
SN - 1546-542X
VL - 9
SP - 172
EP - 177
JO - International Journal of Applied Ceramic Technology
JF - International Journal of Applied Ceramic Technology
IS - 1
ER -