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高温材料处理:国际期刊
SJR: 0.19 SNIP: 0.341 CiteScore™: 0.43

ISSN 打印: 1093-3611
ISSN 在线: 1940-4360

高温材料处理:国际期刊

DOI: 10.1615/HighTempMatProc.v10.i2.10
pages 161-184

PORE NETWORK ARCHITECTURE IN PLASMA SPRAYED CERAMIC COATINGS

Guy Antou
SPCTS - UMR CNRS 6638, Faculty of Sciences, University of Limoges, 123 avenue Albert Thomas, 87060 Limoges, France
Ghislain Montavon
LERMPS laboratory, University of Technology of Belfort‐Montbéliard

ABSTRACT

A combination of two techniques was implemented to quantify the morphology and the connectivity of the complex pore-crack network architecture of thermal sprayed coatings:

  • image analysis coupled to stereological protocols permits to quantify the coating porous morphology, that is to say the porosity level (with a discrimination between globular pores and cracks), the orientation and the linear density of cracks;
  • electrochemical impedance spectroscopy permits to quantify the pore connectivity (the open porosity level).
These techniques were applied to characterize the pore structure of grey alumina (Al2O3-13TiO2) coatings and Yttria-Partially Stabilized Zirconia (Y-PSZ) Thermal Barrier Coatings (TBCs), respectively manufactured implementing air plasma spraying and hybrid plasma spraying (which combines plasma spraying and in situ laser remelting).


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