Title

High-temperature oxidation resistance behavior of porous Ni-16Cr-9Al materials

RIS ID

139775

Publication Details

Wu, L., Yang, G., Xu, Y., Xiao, Y., Li, X., Xu, Y., Qian, J., Ou, Y., Zhang, M., Zhang, Q. & He, Y. (2019). High-temperature oxidation resistance behavior of porous Ni-16Cr-9Al materials. International Journal of Materials Research, 110 (10), 969-978.

Abstract

The oxidation behavior of porous Ni-16Cr-9Al alloys at 800 and 1 000 8C was studied using the isothermal temperature oxidation method. The differences in surface morphology, phase and pore structure between oxidized and non-oxidized materials were characterized by means of scanning electron microscopy, X-ray diffraction analysis and mercury intrusion porosimetry. The results revealed that the oxidation rate of the samples which were oxidized for 420 h at 800 8C was 0.012 %2 h-1 and the oxidation products were Al2O3 and Cr2O3. The oxidation rate of the samples which were oxidized for 390 h at 1 000 8C was 0.415 %2 h-1 and the oxidation products were Al2O3, Cr2O3 and Ni(Cr, Al)2O4. All the oxidation kinetics curves obeyed the parabolic law, exhibiting excellent high temperature oxidation resistance.

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Link to publisher version (DOI)

http://dx.doi.org/10.3139/146.111822