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

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Abstract

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.

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Acknowledgments

Financial support from Czech Ministry of Education, Youth and Sports through grant no. ME901 and Czech Science Foundation grant No. 106/08/1240, as well as the help of Brian Choi and Lorena Bejarano (CTSR at Stony Brook University, USA) are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Materials Engineering, Institute of Plasma Physics, Za Slovankou 3, 182 21, Praha 8, Czech Republic

    Radek Musalek, Jiri Matejicek & Monika Vilemova

  2. Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Trojanova 13, 120 00, Praha 2, Czech Republic

    Radek Musalek, Monika Vilemova & Ondrej Kovarik

Authors
  1. Radek Musalek
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  2. Jiri Matejicek
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  3. Monika Vilemova
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  4. Ondrej Kovarik
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Correspondence to Radek Musalek.

Additional information

This article is an invited paper selected from presentations at the 2009 International Thermal Spray Conference and has been expanded from the original presentation. It is simultaneously published in Expanding Thermal Spray Performance to New Markets and Applications: Proceedings of the 2009 International Thermal Spray Conference, Las Vegas, Nevada, USA, May 4-7, 2009, Basil R. Marple, Margaret M. Hyland, Yuk-Chiu Lau, Chang-Jiu Li, Rogerio S. Lima, and Ghislain Montavon, Ed., ASM International, Materials Park, OH, 2009.

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Musalek, R., Matejicek, J., Vilemova, M. et al. Non-Linear Mechanical Behavior of Plasma Sprayed Alumina Under Mechanical and Thermal Loading. J Therm Spray Tech 19, 422–428 (2010). https://doi.org/10.1007/s11666-009-9362-x

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  • DOI: https://doi.org/10.1007/s11666-009-9362-x

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