Journal
FUSION ENGINEERING AND DESIGN
Volume 90, Issue -, Pages 105-109Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.fusengdes.2014.12.001
Keywords
MOCVD; Yttrium oxide; XPS; Infrared spectroscopy; Hydrogen isotope permeation barrier
Categories
Funding
- National Natural Science Foundation of China [51402020]
Ask authors/readers for more resources
Yttrium oxide coatings were deposited on 316L substrate using metal organic chemical vapor deposition (MOCVD) technique with yttrium beta-diketonates organometallic Y(tmhd)(3) as precursor. The different microstructures were obtained by annealing coatings at 700 degrees C or as-deposited. The film was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), infrared spectroscopy and X-ray photoelectron spectroscopy (XPS). The hydrogen permeation inhibition performance of films was investigated by deuterium permeation experiment. The crystalline structure of the coatings depended on the post-anneal; the crystallite size of the coating increases and the surface exhibits compact surface morphology for the coatings post-annealed at 700 degrees C. The coating post-annealed at 700 degrees C has the correct oxygen/yttrium ratio corresponding well to the stoichiometric Y2O3, while some concentrations of carbon and hydrogen impurities were found in the as-deposited coating. The impurities are present in the form of unreacted or partially reacted precursor molecules due to the incomplete decomposition of the original precursor. The deuterium permeability of the coating improved obviously after post-anneal and was around 240-410 times less than that of the 316L stainless steel, which means efficient inhibition to deuterium permeation. (C) 2014 Elsevier B.V. All rights reserved,
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available