Oxidation and thermal shock behavior of thermal barrier coated 18/10CrNi alloy with coating modifications

GÜRGEN S., Diltemiz S. F., KUŞHAN M. C.

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, vol.31, no.1, pp.149-155, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 1
  • Publication Date: 2017
  • Doi Number: 10.1007/s12206-016-1214-2
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.149-155
  • Keywords: Laser glazing, Oxidation, Thermal barrier coating, Thermal shock, Vacuum heat treatment, TGO GROWTH-BEHAVIOR, PREOXIDATION TREATMENT, LASER TREATMENT, OXIDE LAYER, MICROSTRUCTURE, RESISTANCE, SYSTEM
  • Eskisehir Osmangazi University Affiliated: Yes


In this study, substrates of 18/10CrNi alloy plates were initially sprayed with a Ni-21Cr-10Al-1Y bond coat and then with an yttria stabilized zirconia top coat by plasma spraying. Subsequently, plasma-sprayed Thermal barrier coatings (TBCs) were treated with two different modification methods, namely, vacuum heat treatment and laser glazing. The effects of modifications on the oxidation and thermal shock behavior of the coatings were evaluated. The effect of coat thickness on the bond strength of the coats was also investigated. Results showed enhancement of the oxidation resistance and thermal shock resistance of TBCs following modifications. Although vacuum heat treatment and laser glazing exhibited comparable results as per oxidation resistance, the former generated the best improvement in the thermal shock resistance of the TBCs. Bond strength also decreased as coat thickness increased.