Abstract：The oxidation kinetics curve and oxidation rate of sintered nickel-based superalloy mesh porous materials with two different sizes and dense monofilament samples at 900 ℃ were tested through static weight gain method. The surface area of the porous small sample was tested through the 9410 automatic mercury porosimeter， and was also calculated through the permeability coefficient， and the oxidation rate of the porous small sample was corrected accordingly. The morphology and oxide composition of the porous samples were observed by SEM， EDS and XRD. The results show that the oxidation rate of the large and small porous samples is about 7 times that of monofilament sample after 100 h oxidation experiment. The oxidation rate of the modified small porous sample is much smaller than that before being corrected， which is also smaller than the oxidation rate of the monofilament sample. The surface oxide of the porous samples is spherical and distributed uniformly， and its composition is mainly NiCr2O4.
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2017, Vol. 27 
