Accessible Requires Authentication Published by De Gruyter February 23, 2021

High temperature oxidation resistance of porous Ni–Cr–Fe materials

Liang Wu, Yifeng Xiao, Xiuyan Xia, Jinwen Qian and Yuehui He

Abstract

The oxidation behavior of porous Ni-Cr-Fe materials prepared by reactive powder synthesis with different open porosity was studied in air at 6008C, 800 8C and 1 0008C. The differences in surface morphology, phase and pore structure parameters between material oxidized and non-oxidized were characterized by means of scanning electron microscopy, X-ray diffraction analysis and mercury intrusion. The results show that the oxidation rate of the samples which were oxidized at 600 8C for 340 h, for 560 h at 800 8C and for 560 h at 1 000 8C were 0.00027%2 h-1, 0.0558%2 h-1, and 0.64412%2 h-1, respectively. All the oxidation kinetics curves obeyed the parabolic law, exhibiting excellent high temperature oxidation resistance.

Published Online: 2021-02-23
Published in Print: 2020-04-01

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