Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1660819 | Surface and Coatings Technology | 2007 | 4 Pages |
Abstract
A two-layer NiAl coating can be deposited by electron beam physical vapour deposition (EB-PVD) on Ni-based superalloy, and the isothermal oxidation test at 1100 °C in air was conducted to evaluate the oxidation behavior of the coating. The dominant phase changed from β-phase to γ′-phase with the oxidation going on. Oxide ridges can be detected on the surface of the as-processed coating, oxide scales on the coating surface can be divided into two categories including the primary scales and the secondary scales formed only after the spallation of the primary scales. The primary scales form to connect the isolated oxide ridges, while the secondary scale's peak clipping effect may cause the surface morphology more and more even.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Hefei Li, Shufeng Tao, Zhaohui Zhou, Lidong Sun, Hesnawi.A, Shengkai Gong,