Structure and properties of plasma sprayed BaTiO3 coatings

0347345 - ÚFP 2011 RIV GB eng J - Journal Article
Ctibor, Pavel - Ageorges, H. - Sedláček, J. - Čtvrtlík, Radim
Structure and properties of plasma sprayed BaTiO3 coatings.
Ceramics International. Roč. 36, č. 7 (2010), s. 2155-2162. ISSN 0272-8842. E-ISSN 1873-3956
R&D Projects: GA AV ČR KAN301370701
Institutional research plan: CEZ:AV0Z20430508; CEZ:AV0Z10100522
Keywords : Cermet * plasma spraying * microstructure * elastic modulus * wear resistance
Subject RIV: JH - Ceramics, Fire-Resistant Materials and Glass
Impact factor: 1.471, year: 2010

Plasma spraying enables to create layers with thickness in a millimeter range adhering on various substrates. This paper provides a study of electric and mechanical properties of BaTiO3 coatings prepared by atmospheric plasma spraying. The spraying was carried out by a direct current gas-stabilized plasma gun. BaTiO3 was fed into the plasma jet as a feedstock powder prepared by a reactive sintering of micrometer-sized powders of BaCO3 and TiO2. Microstructure and phase composition are reported and discussed in connection with electric and mechanical properties. The ability of the used techniques to detect precisely the phase transformation temperatures of BaTiO3 plasma sprayed coatings is discussed as well. A depth-sensing indentation measurement was done between 290 and 520 K to provide local mechanical characterization. The elastic modulus has shown slightly higher values than that reported typically in papers focused on BaTiO3 ferroelectric thin films.
Permanent Link: http://hdl.handle.net/11104/0188143