Oxidation behaviour of Ni-20Cr-Y2O3 ODS microcrystalline coatings

被引：0
|
作者：
Pang, H. [1 ]
Qi, H. [1 ]
He, Y. [1 ]
Wang, D. [1 ]
机构：
[1] Corrosion and Protection Center, Univ. of Science and Tech. Beijing, Beijing 100083, China
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2001年 / 11卷 / 02期
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摘要：
Ni-20Cr-Y2O3 ODS microcrystalline coatings were prepared on the surface of the Ni-20Cr alloy by a high frequency electro-spark technique. The coatings have metallurgical bonding with the substrate of alloy. Oxidation in air at 1000°C for 100 h shows that the selective oxidation of Cr has been promoted to form the Cr2O3 scale by the microcrystalline structure and the oxide dispersions of Y2O3 in the coatings. The oxidation resistance and the adhesion of oxide scales to the substrate are also improved. The surface morphologies, structure and composition of the Ni-20Cr alloy and the Ni-20Cr-Y2O3 ODS microcrystalline coatings were observed and analyzed by AFM, SEM, EDS and XRD. The synergistic effects of oxide dispersed microcrystalline coatings on improving the oxidation resistance of the alloy Ni-20Cr have been discussed.
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页码：187 / 192
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