Study on Cyclic Oxidation Behavior of Y and La Modified Ni-10Cr-5Al Alloys
SHANG Genfeng1, HUANG Jiapeng1, WANG Hang2
1 School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000; 2 Institute of Engineering, Jiangxi University of Science and Technology, Ganzhou 341000
Abstract: The cyclic oxidation behavior of Ni-10Cr-5Al (mass fraction,%) alloys containing 0.1% (mass fraction) La or Y-La at 1 100 ℃ and 1 200 ℃ was studied. The kinetics of cyclic oxidation of the alloys were studied by means of thermogravimetric analysis, and the evolution rules of phase, microstructure and composition of the oxides were studied by X-ray diffraction and scanning electron microscopy with energy-dispersive X-ray spectroscopy. The difference of the adhesion of the surface scale of Ni-10Cr-5Al alloys containing La or Y-La at different oxidation temperature was analyzed. The results indicated that the addition of 0.1% (mass fraction) La or Y-La in Ni-10Cr-5Al alloy could not only reduce the thickness of the oxide film, but also improve the adhesion of the oxide film due to the formation of “pinning”, thus the anti-oxidation performance at 1 100 ℃ of the alloys were improved. While the effect of co-doping Y-La was better than that of single adding of La. However, the anti-oxidation performance at 1 200 ℃ of the alloys was deteriorate owing to the severe internal oxidation along the grain boundary.
尚根峰, 黄嘉鹏, 汪航. Y,La改性Ni-10Cr-5Al合金的循环氧化行为研究[J]. 《材料导报》期刊社, 2018, 32(4): 584-588.
SHANG Genfeng, HUANG Jiapeng, WANG Hang. Study on Cyclic Oxidation Behavior of Y and La Modified Ni-10Cr-5Al Alloys. Materials Reports, 2018, 32(4): 584-588.
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2018, Vol. 32 
