Chapter 26. Effects of Arc Current on the Life in Burner-Rig Thermal Cycling of Plasma-Sprayed ZrO2-Y2O3

  1. William J. Smothers
  1. R. C. Hendricks and
  2. G. McDonald

Published Online: 26 MAR 2008

DOI: 10.1002/9780470318782.ch26

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

How to Cite

Hendricks, R. C. and McDonald, G. (1982) Effects of Arc Current on the Life in Burner-Rig Thermal Cycling of Plasma-Sprayed ZrO2-Y2O3, in Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10 (ed W. J. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470318782.ch26

Author Information

  1. NASA-Lewis Research Center Cleveland, OH 44135

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1982

ISBN Information

Print ISBN: 9780470373972

Online ISBN: 9780470318782

SEARCH

Keywords:

  • polishing;
  • equalization;
  • communication;
  • disposing;
  • hazardous

Summary

An analysis of thermal-cycle-life data for four sets of eight thermal-barrier-coated specimens representing arc currents (plasma-gun power) of 525, 600, 800, or 950 A is presented. The ZrO2-8Y2O3/NiCrAlY plasma-spray-coated superalloy rods were thermal cycled to 1040°C in a Mach-0.3, Jet A/air-burner flame. The experimental results indicate the existence of a minimum or threshold power level below which coating life expectancy is <500 cycles. Above the threshold power level, coating life expectancy more than doubles and increases with arc current.