Metallographic Study of Mesostructure-Ordered Plasma Ceramic Coatings

Abstract:

This article provides the reader with results of the study of mesostructure ordered plasma ceramic coatings derived from narrow-fraction powders under optimum modes for this fraction. It is noted that it is succeeded to implement mesostructure ordering of coatings eliminating the formation of continuous columnar structures by means of spraying mode control. It is proven that it is possible to get formation of nanocolumnar structures in a near surface layer, and these structures provide bonds damping between clusters under alternating force and thermal loads of coated parts. To evaluate the quality of formed ordered structure, a quantitative criterion—mesostructure ordering coefficient—is used. The Methods of quantitative evaluation of mesoordering of coating structure has been developed.

• Periodical: Key Engineering Materials (Volume 743)
• Pages: 118-123
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.743.118
• Online since: July 2017
• Authors: Valery I. Bogdanovich*, Mikhail G. Giorbelidze
• Keywords: Ceramics, Gas Turbine Engine, Mesostructure Ordering Coefficient, Metallographic Analysis, Microcracks, Nanocolumnar Crystallite Structure, Plasma Coatings, Powder Material, Quantitative Evaluation Methods of Coating Quality

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