Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10156100 | Surface and Coatings Technology | 2018 | 32 Pages |
Abstract
In this paper, phase pure cubic yttrium oxide (Y2O3) films deposited by electron beam physical vapor deposition technique on Inconel-718 substrate at different substrate temperatures (773-973â¯K) are investigated. The structure and phase evolution in the films of Y2O3 as a function of substrate temperature have been evaluated by X-ray diffraction. Atomic force microscopy and scanning electron microscopy were used to examine the surface roughness and morphology of the as-deposited Y2O3 films. The adhesion behavior of the Y2O3 film with Inconel-718 substrate was investigated using scratch indentation testing. The thermal expansion coefficient (TEC) of Inconel-718 substrate and Y2O3 film coated on Inconel-718 substrate were determined by high temperature X-ray diffraction (HTXRD) measurement in the temperature range of 298-1273â¯K with temperature interval of 100â¯K. The linear TECs of Inconel-718 and Y2O3 film at 1273â¯K were found to be 1.22â¯Ãâ¯10â5â¯Kâ1 and 7.02â¯Ãâ¯10â6â¯Kâ1, respectively. Thermal stability of the Y2O3 coated Inconel-718 substrate tested at 1273â¯K in air over a period of 100â¯h is also discussed.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
A.M. Kamalan Kirubaharan, P. Kuppusami, T. Dharini,