Oxidation resistance of the nanostructured YSZ coating on the IN-738 superalloy

Document Type : Research Paper

Authors

1 Department of Metallurgy and Materials Engineering, Faculty of Technology and Engineering, Shahrekord University, Iran

2 School of Metallurgy and Materials, College of Engineering, University of Tehran, Iran.

3 School of Metallurgy and Materials, College of Engineering, 2 University of Tehran, Iran

Abstract

Conventional and nanostructured YSZ coatings were deposited on the IN-738 Ni super alloy by the atmospheric plasma spray technique. The oxidation was measured at 1100°C in an atmospheric electrical furnace. According to the experimental results the nanostructured coatings showed a better oxidation resistance than the conventional ones. The improved oxidation resistance of the nanocoating could be explained by the change in structure to a dense and more packed structure in this coating. The mechanical properties of the coatings were tested using the thermal cyclic, nanoindentation and bond strength tests, during which the nanostructured YSZ coating showed a better performance by structural stability.

Keywords

References

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Journal of Ultrafine Grained and Nanostructured Materials
Volume 47, Issue 2 - Serial Number 2
December 2014
Pages 89-96

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History

  • Receive Date: 02 December 2013
  • Revise Date: 17 February 2015
  • Accept Date: 30 December 2014

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