Journal of Bionic Engineering

, Volume 15, Issue 3, pp 545–557 | Cite as

Effect of Bionic Unit Shapes on Solid Particle Erosion Resistance of ZrO2–7wt%Y2O3 Thermal Barrier Coatings Processed by Laser

  • Panpan Zhang
  • Fuhai Li
  • Xiaofeng Zhang
  • Zhihui Zhang
  • Chaolin Tan
  • Luquan Ren
  • Yueliang Wang
  • Wenyou Ma
  • Min Liu
Article

Abstract

Inspired by the coupling phenomena in biological systems, to improve the solid particle erosion resistance of Thermal Barrier Coatings (TBCs), different kinds of bionic units were made on the coating surfaces using Bionic Coupled Laser Remelting (BCLR) process. The NiCoCrAlYTa/ZrO2–7wt%Y2O3 double-layer structured TBCs were prepared by air plasma spraying. The microstructure, microhardness and phase composition of the as-sprayed and bionic specimens were examined. The solid particle erosion behaviors of bionic specimens as function of bionic unit shape were investigated. The results indicated that the bionic specimens had better erosion resistance than the as-sprayed specimen. The specimen with striation and grid bionic units had the better erosion resistance, while the dot showed the worse. The bionic units were characterized by the dense columnar crystal structure and the high hardness, which are the main reasons for improving the erosion resistance. Under the synergistic action of the shear stress and normal stress on the protrusive coating surface, the erosion failure of the as-sprayed TBCs was proved to be the fracture and spallation of the splats. By contrast, the spallation of segmented bionic unit occurred in the overlapping area between the adjacent laser irradiation, and the erosive unit surface presented the clear and deep furrows, which revealed that the erosion failure mechanism of bionic TBCs was dominated by brittle and some ductile erosion. These results showed more opportunities for bionic application in improving the solid particle erosion resistance of components in the windy and sandy environment.

Keywords

bionic thermal barrier coatings erosion resistance laser 

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Notes

Acknowledgments

This work is supported by Science and Technology Project of Guangdong Province (2014B050502008), Science and Technology plan projects of Guangdong Province (2017A070702016, 2017A070701027), Guangzhou Science and Technology Program key projects (201510010095), Natural Science Foundation of Guangdong Province (2016A030312015), the National Natural Science Foundation for Youth (51501044), and 111 Project of China (B16020).

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Copyright information

© Jilin University 2018

Authors and Affiliations

  • Panpan Zhang
    • 1
    • 2
  • Fuhai Li
    • 2
  • Xiaofeng Zhang
    • 2
  • Zhihui Zhang
    • 1
    • 3
  • Chaolin Tan
    • 2
  • Luquan Ren
    • 1
  • Yueliang Wang
    • 2
  • Wenyou Ma
    • 2
  • Min Liu
    • 2
  1. 1.The Key Laboratory of Bionic Engineering (Ministry of Education, China)Jilin UniversityChangchunChina
  2. 2.Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technologythe Key Lab of Guangdong for Modern Surface Engineering TechnologyGuangzhouChina
  3. 3.The State Key Laboratory of Automotive Simulation and ControlJilin UniversityChangchunChina

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