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

Authors

Liang Wu, Xiangtan University
Ge Yang, Xiangtan University
Yang Xu, Xiangtan University
Yifeng Xiao, Xiangtan University
Xi Li, University of Wollongong, Australian Nuclear Science And Technology OrganisationFollow
Yanfei Xu, Xiangtan University
Jinwen Qian, Xiangtan University
Yan Ou, Xiangtan University
Minghua Zhang, Xiangtan University
Qiankun Zhang, Xiangtan University
Yuehui He, Central South University

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.