Influence of Microstructure on Thermal Properties of Axial Suspension Plasma-Sprayed YSZ Thermal Barrier Coatings

0459858 - ÚFP 2017 RIV US eng J - Journal Article
Ganvir, A. - Curry, N. - Markocsan, N. - Nylen, P. - Joshi, S. - Vilémová, Monika - Pala, Zdeněk
Influence of Microstructure on Thermal Properties of Axial Suspension Plasma-Sprayed YSZ Thermal Barrier Coatings.
Journal of Thermal Spray Technology. Roč. 25, 1-2 (2016), s. 202-212. ISSN 1059-9630. E-ISSN 1544-1016.
[ITSC 2015: International Thermal Spray Conference and Exposition. Long Beach, California, 11.05.2015-14.05.2015]
Institutional support: RVO:61389021
Keywords : axial injection * columnar microstructure * porosity * suspension plasma spraying * thermal conductivity * thermal diffusivity
Subject RIV: JK - Corrosion ; Surface Treatment of Materials
Impact factor: 1.488, year: 2016
http://link.springer.com/article/10.1007%2Fs11666-015-0355-7

This work investigates suspension plasma-sprayed TBCs produced using axial injection with different process parameters. The influence of coating microstructure on thermal properties was of specific interest. Tests carried out included microstructural analysis, phase analysis, determination of porosity, and pore size distribution, as well as thermal diffusivity/conductivity measurements. Results showed that axial suspension plasma spraying process makes it possible to produce various columnar-type coatings under different processing conditions. Significant influence of microstructural features on thermal properties of the coatings was noted. In particular, the proces parameter-dependent microstructural attributes, such as porosity, column density, and crystallite size, were shown to govern the thermal diffusivity and thermal conductivity of the coating.
Permanent Link: http://hdl.handle.net/11104/0260013