Korean Journal of Materials Research, Vol.12, No.3, 220-224, March, 2002
Ni 3 Al-7.8%Cr-1.3%Zr-0.8%Mo-0.025%B 합금의 고온산화막분석
Characterization of Oxide Scales Formed on Ni 3 Al-7.8%Cr-1.3%Zr-0.8%Mo-0.025%B
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The oxide scales formed on Ni 3 Al -7.8%Cr-1.3%Zr-0.8%Mo-0.025%B after oxidation at 900, 1000 and 110 0 ? C in air were studied using XRD, SEM, EPMA and TEM. The oxide scales consisted primarily of NiO,NiAl 2 O 4 ,α?Al 2 O 3 ,monoclinic?ZrO 2 ,andtetragonal?ZrO 2 . The outer layer of the oxide scale was rich in Ni-oxides, whereas the internal oxide stringers were rich in Al-oxides and ZrO 2 . Within the above oxide scales, Cr and Mo tended to exist as dissolved ions.
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