摘要
Ni3Al coatings with and without Y2O3 particles were developed by annealing the electrodeposited Ni-Al composite coatings with and without Y2O3 particles at 800 °C for 3 h. The microstructures and cyclic oxidation performances of the produced Ni3Al coatings were comparatively investigated, with the emphasis on the effect of Y2O3. SEM/EDAX and TEM characterizations showed that the dispersion of Y2O3 refines the grains. Oxidation at 900 °C for 100 h showed that the addition of Y2O3 significantly improved the cyclic oxidation resistance of Ni3Al coating. The effect of Y2O3 on the microstructure and the oxidation of the Ni3Al coating were discussed in detail.
将Ni-Al和Ni-Al/Y2O3复合镀层分别在800°C下扩散3h制备纯Ni3Al和Y2O3改性的Ni3Al合金涂层,对其显微组织和氧化性能进行对比研究。SEM/EDAX和TEM分析表明,涂层中Y2O3的加入抑制了合金化过程中基体晶粒的长大。在900°C下循环氧化100h的结果表明,Y2O3的加入明显提高了Ni3Al合金涂层的抗循环氧化性能。对Y2O3影响Ni3Al涂层的结构和氧化性能的机理进行了分析。
基金
Project (11531319) supported by Scientific Research Fund of Heilongjiang Provincial Education Department, China
