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Fatigue Behavior of Bodies with Thermally Sprayed Metallic and Ceramic Deposits

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Abstract

This paper summarizes the basic results of fatigue testing of bodies with both metallic and ceramic thermally sprayed coatings. Three kinds of ceramic coatings (Al2O3, Cr2O3, and olivine) sprayed with DC plasma under identical conditions were investigated together with metallic Ni-5wt.%Al coatings sprayed by wire arc, DC plasma, and HVOF. The elastic modulus of the deposited coatings was investigated using four point bending and resonance method. Bending fatigue tests at resonance frequency were performed with cantilever beam specimens. The processes taking place during the fatigue test are identified and discussed. The morphology of the fracture surfaces was investigated together with microstructure and porosity of the coatings.

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Acknowledgments

This research has been supported by Czech Science Foundation grant No. 106/05/0483. CTSR of SUNY at Stony Brook is acknowledged for specimen preparation.

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Authors and Affiliations

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

    Ondřej Kovářík & Jan Siegl

  2. Office of Research, Nanyang Technological University, 50 Nanyang Avenue, Blk N4, B4b-09, Singapore, Singapore, 639798

    Zdeněk Procházka

Authors
  1. Ondřej Kovářík
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  2. Jan Siegl
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  3. Zdeněk Procházka
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Correspondence to Ondřej Kovářík.

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Kovářík, O., Siegl, J. & Procházka, Z. Fatigue Behavior of Bodies with Thermally Sprayed Metallic and Ceramic Deposits. J Therm Spray Tech 17, 525–532 (2008). https://doi.org/10.1007/s11666-008-9205-1

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  • DOI: https://doi.org/10.1007/s11666-008-9205-1

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