Strontium Zirconate TBC Sprayed by a High Feed-Rate Water-Stabilized Plasma Torch

A novel thermal barrier coating (TBC) material, strontium zirconate SrZrO 3 , was sprayed by a high feed-rate water-stabilized plasma torch WSP 500. Stainless steel coupons were used as substrates. Coatings with a thickness of about 1.2 mm were produced, whereas the substrates were preheated over 45...

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Bibliographic Details
Published inJournal of thermal spray technology Vol. 26; no. 8; pp. 1804 - 1809
Main Authors Ctibor, P., Nevrla, B., Cizek, J., Lukac, F.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.12.2017
Subjects
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Machines
Manufacturing
Materials Science
Peer Reviewed
Processes
Surfaces and Interfaces
Thin Films
Tribology
strontium zirconate
thermal insulator
adhesion
plasma spraying
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Summary:A novel thermal barrier coating (TBC) material, strontium zirconate SrZrO 3 , was sprayed by a high feed-rate water-stabilized plasma torch WSP 500. Stainless steel coupons were used as substrates. Coatings with a thickness of about 1.2 mm were produced, whereas the substrates were preheated over 450 °C. The torch worked at 150 kW power and was able to spray SrZrO 3 with a high spray rate over 10 kg per hour. Microstructure and microhardness, phase composition, adhesion, thermal conductivity and thermal expansion were evaluated. The coating has low thermal conductivity under 1 W/m K in the interval from room temperature up to 1200 °C. Its crystallite size is slightly over 400 nm and thermal expansion 12.3 µm K −1 in the similar temperature range.
ISSN:1059-9630
1544-1016
DOI:10.1007/s11666-017-0641-7