A comparative study of oxidation kinetics and thermal cyclic performance of thermal barrier coatings (TBCs)

Karaoglanli A. C., Grund T., TÜRK A., Lampke T.

Surface and Coatings Technology, vol.371, pp.47-67, 2019 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 371
  • Publication Date: 2019
  • Doi Number: 10.1016/j.surfcoat.2018.12.082
  • Journal Name: Surface and Coatings Technology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.47-67
  • Keywords: Atmospheric plasma spraying (APS), High velocity oxy fuel (HVOF), Oxidation kinetics, Thermal barrier coatings (TBCs), Thermal cyclic performance, Thermally grown oxide (TGO)
  • Manisa Celal Bayar University Affiliated: Yes

Abstract

The present study was carried out to investigate the isothermal oxidation behavior, thermal cyclic performance and oxidation kinetics of thermal barrier coatings (TBCs) systems consisting of CoNiCrAlY metallic bondcoats produced by Atmospheric plasma spraying (APS) and high velocity oxy fuel spraying (HVOF) on Inconel 718 substrate. Yttria stabilized zirconia (YSZ) ceramic top coats was produced by APS process as for the insulation layer. The oxidation behavior of the coatings were investigated under isothermal oxidation conditions at 1000 °C, 1100 °C and 1200 °C for 8, 24, 50 and 100 h. The results of the experimental studies on the oxidation kinetics and microstructural evolution of APS and HVOF sprayed thermal barrier coatings (TBCs) are compared and discussed in the paper. The microstructural changes at the metallic/ceramic interface and growth behavior of the thermally grown oxide (TGO) layers during the isothermal oxidation and thermal cyclic tests were analyzed in detail.