Effect of γ′ Phase Elements on Oxidation Behavior of Nanocrystalline Coatings at 1050 °C

Materials

Shenglong Zhu¹  Yixuan Jia¹  Shasha Yang¹  Yanxin Qiao²  Pingyi Guo²  Lanlan Yang²  Minghui Chen³  Fuhui Wang³  Jinlong Wang³ 

[1] Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China;School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China;

关键词: superalloys;    oxidation;    nanocrystalline coatings;    magnetron sputtering;   

DOI  :  10.3390/ma14010202

来源: DOAJ

【 摘 要 】

To study the effect of γ′ phase elements on the oxidation behavior of nanocrystalline coatings, two comparable nanocrystalline coating systems were established and prepared by magnetron sputtering. The oxidation experiments of the nanocrystalline coatings on the K38G and N5 superalloys were carried at 1050 °C for 100 h, respectively. The chemical composition of the above coatings is the same as the substrate alloy, including the γ′ elements, such as Al, Ta, and Ti. After serving at a high temperature for certain periods, their oxides participated and then affected the oxidation behavior of the coatings. The Al₂O₃ scale can be formed on the N5 coating, which cannot be formed on the K38G coating. Tantalum and titanium oxides can be detected on the oxide scale, which ruin its purity and integrity.

【 授权许可】

Unknown