Sol–gel derived alumina layers on nickel-base superalloy Inconel-718 (IN-718)

Modified Yoldas sols can be used to prepare crack-free well adherent layers on different substrate materials such as soda–lime glass, corundum and metal (IN-718). These layers having thicknesses of 0.6 µm are strain tolerant and withstand thermal cycling between 810 °C and room temperature. Introduc...

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Bibliographic Details
Published in:Thin solid films 2008-11, Vol.517 (2), p.786-792
Main Authors: Dressler, M., Nofz, M., Saliwan-Neumann, R., Dörfel, I., Griepentrog, M.
Format: Article
Language:English
Subjects:
Alumosol
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Filler particles
Inconel-718
Liquid phase epitaxy
deposition from liquid phases (melts, solutions, and surface layers on liquids)
Materials science
Methods of deposition of films and coatings
film growth and epitaxy
Physics
Scanning electron microscopy
Sol–gel
Structure and morphology
thickness
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Thin film structure and morphology
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Description
Summary:Modified Yoldas sols can be used to prepare crack-free well adherent layers on different substrate materials such as soda–lime glass, corundum and metal (IN-718). These layers having thicknesses of 0.6 µm are strain tolerant and withstand thermal cycling between 810 °C and room temperature. Introducing alpha-Al 2O 3 filler particles into modified Yoldas sols allows the preparation of thicker layers of 1.6 µm, which as well can be thermally cycled without noticeable delaminations. Chemical bonding seems to be the predominant layer bonding mechanism.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2008.08.124