Femtosecond laser polishing yttria-stabilized zirconia coatings for improving molten salts corrosion resistance

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

1 Scopus Citations
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Author(s)

  • Zhengjie Fan
  • Xiaomao Sun
  • Xueshi Zhuo
  • Xuesong Mei
  • Jianlei Cui
  • Wenqiang Duan
  • Wenjun Wang
  • Xiaofeng Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number109367
Journal / PublicationCorrosion Science
Volume184
Online published3 Mar 2021
Publication statusPublished - 15 May 2021

Abstract

In this study, we present a novel method of polishing thermal barrier coatings' surface using high-frequency femtosecond laser. Compared to the conventional mechanical micro-grinding, light trapping due to multiple reflection from porous-structure, which enhances its coupling into coating, resulted in desired effect of healing of the voids in performing a layer-by-layer laser ablation. Herein, the corrosion resistances of these coatings subjected to Na2SO4+V2O5 at 1000 °C was investigated. Three observed transport behaviors: (i) molten salts infiltration, (ii) Y-leaching, and (iii) V-in-diffusion, are discussed to illustrate corrosion mechanisms. Laser-polished coatings with smooth surface and healed voids show superior molten salts resistance and significantly alleviate leaching or in-diffusion of elements.

Research Area(s)

  • Ceramic, High-temperature corrosion, Laser polishing, Molten salts, Thermal barrier coatings

Citation Format(s)

Femtosecond laser polishing yttria-stabilized zirconia coatings for improving molten salts corrosion resistance. / Fan, Zhengjie; Sun, Xiaomao; Zhuo, Xueshi; Mei, Xuesong; Cui, Jianlei; Duan, Wenqiang; Wang, Wenjun; Zhang, Xiaofeng; Yang, Lu.

In: Corrosion Science, Vol. 184, 109367, 15.05.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review