Abstract
The effects of stainless steel powder particle size, sintering temperature and soaked time on the oxidation resistance performance of foam with 3D open-cell network structure at 800 °C were mainly investigated, and the improvement mechanism of Cr 3C 2 on the oxidation resistance performance of foam was also discussed in this paper. The experimental results show that the oxidation resistance performance of foam improves with the decrease of stainless steel powder particle size, the increase of sintering temperature and the prolongation of soaked time, which may be due to the facts that the fine particle size, high sintering temperature and long soaked time can make the foam sintered compactly and the oxidizable interface between foam and air medium shrink, at the same time, the open porosity of foam decreases; the addition of Cr 3C 2 is effective to improve the oxidation resistance ability of foam at high temperature due to that the preferential formation of excessive compact anti-oxidation Cr 2O 3 film in the existence of Cr 3C 2; however, the bending strength decrease with the content of Cr 3C 2 rising.
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