Non-Linear Mechanical Behavior of Plasma Sprayed Alumina Under Mechanical and Thermal Loading

0346365 - ÚFP 2011 RIV US eng J - Journal Article
Mušálek, Radek - Matějíček, Jiří - Vilémová, Monika - Kovářík, O.
Non-Linear Mechanical Behavior of Plasma Sprayed Alumina Under Mechanical and Thermal Loading.
Journal of Thermal Spray Technology. Roč. 19, 1-2 (2010), s. 422-428. ISSN 1059-9630. E-ISSN 1544-1016.
[International Thermal Spray Conference (ITSC 2009):Expanding Thermal Spray Performance to New Markets and Applications. Las Vegas, NV, 04.05.2009-07.05.2009]
R&D Projects: GA ČR GA106/08/1240; GA MŠMT ME 901
Institutional research plan: CEZ:AV0Z20430508
Keywords : APS coatings * fatigue and fracture * hardness and (visco-) elastic properties * influence of spray parameters * stiffness * thermal cycling
Subject RIV: JK - Corrosion ; Surface Treatment of Materials
Impact factor: 1.844, year: 2010
http://www.springerlink.com/content/a8387uk8716x53x1/fulltext.pdf

Mechanical response of plasma sprayed ceramic coatings to mechanical and thermal loading of various extents was studied. Coated samples were subjected to four-point bending (4PB), with coatings loaded in tension and compression, respectively. Thermal loading was provided by heating the samples, while stresses were generated by thermal mismatch between the coatings and substrates. In both cases, cyclic loading was applied. Non-linear behavior and significant hysteresis were observed, indicating inelastic phenomena taking place. The tests were complemented by structural observations in SEM and indentation tests. Relevant structural features and possible mechanisms underlying this behavior are discussed.
Permanent Link: http://hdl.handle.net/11104/0187412