Ni-20Cr-Y_2O_3弥散氧化物微晶涂层及其高温氧化性能  

Oxidation behaviour of Ni-20Cr-Y_2O_3 ODS microcrystalline coatings

作　　者：庞洪梅[1] 齐慧滨[1] 何业东[1] 王德仁[1] 

机构地区：[1]北京科技大学腐蚀与防护中心,北京100083

出　　处：《中国有色金属学报》2001年第2期187-192,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目! (5 980 10 0 2 )

摘　　要：采用高频电脉冲沉积技术在Ni 2 0Cr合金表面上沉积MGH75 4ODS合金 ,获得了Ni 2 0Cr Y2 O3 弥散氧化物微晶涂层。在 10 0 0℃空气中对Ni 2 0Cr合金及施加涂层的试样进行 10 0h的氧化实验。结果表明 ,微晶化和添加弥散氧化物 (Y2 O3)促进了铬发生选择氧化形成Cr2 O3 氧化膜 ,提高了合金的抗高温氧化性能和氧化膜的粘附性。用AFM ,SEM ,EDS和XRD分别对Ni 2 0Cr合金与Ni 2 0Cr Y2 O3 弥散氧化物微晶涂层的形貌、结构和成分进行了研究 ,讨论了弥散氧化物微晶涂层改善Ni 2 0Cr合金高温氧化性能的协同作用机理。Ni 20Cr Y 2O 3 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 1?000?℃ for 100?h shows that the selective oxidation of Cr has been promoted to form the Cr 2O 3 scale by the microcrystalline structure and the oxide dispersions of Y 2O 3 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 Y 2O 3 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. [

关 键 词：高频电脉冲沉积 弥散氧化物微晶涂层 高温氧化性能 镍铬合金 

分 类 号：TG174.451[金属学及工艺—金属表面处理] TG174.32[金属学及工艺—金属学]