Nickel-based superalloys used in stressed situations at high temperatures tend to be optimized for mechanical properties and have insufficient aluminium to form a continuous surface layer in service to provide long-term protection against oxidation. This deficiency can be met through the use of coatings that have higher aluminium contents and which form a protective alumina layer during service. These can take the form of metallic overlays or diffusion coatings, both of which can also form a bondcoat layer within thermal barrier coatings (TBCs). Factors which lead to loss of aluminium through oxidation and interdiffusion are discussed in this article. A consequence of excessive aluminium depletion is the formation of non-protective oxides which can be particularly deleterious in TBCs.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Oxidation of high-temperature coatings


    Contributors:
    Evans, H E (author) / Taylor, M P (author)


    Publication date :

    2006-01-01


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Oxidation of high-temperature coatings

    Evans, H. | Online Contents | 2006


    Oxidation coatings process

    Online Contents | 1998


    Oxidation coatings process

    British Library Online Contents | 1998


    High Temperature Electrical Wire Coatings

    N. Bilow / K. L. Rose | NTIS | 1969


    High-Emissivity Coatings For High-Temperature Surfaces

    Deininger, William D. / King, David Q. | NTRS | 1988