Cavitation erosion mechanisms in stainless steels and in composite metal–ceramic HVOF coatings

Gabriel Taillon, Fabrice Pougoum, Sebastien Lavigne, Laurent Ton-That*, Robert Schulz, Etienne Bousser, Sylvio Savoie, Ludvik Martinu, Jolanta Ewa Klemberg-Sapieha

*この研究の対応する著者

研究成果: Article査読

51 被引用数 (Scopus)

抄録

Cavitation erosion is a leading cause of hydraulic machinery erosion: imploding cavitation bubbles cause impacts, pitting, and mass loss leading to the component׳s failure. Damage can be mitigated by the use of protective coatings tailored to resist pitting and crack nucleation, to greatly increase the part׳s lifetime. Coatings deposited with the High Velocity Oxy-Fuel (HVOF) process demonstrate low porosity, high hardness and high adhesion. In this work, the cavitation erosion behavior of martensitic and ferritic stainless steels and HVOF coatings prepared from pure Fe3Al powder and Fe3Al reinforced with nitride and boride phases was investigated using the G32 vibratory setup. The results are compared with coatings sprayed from commercial powders: WC–CoCr and Cr3C2–NiCr. HVOF coatings exhibit slightly lower erosion rates than martensitic stainless steels. The mechanical properties were evaluated using depth sensing indentation: higher hardness was associated with better cavitation erosion resistance for steels, but not for the coatings. The composite coatings’ wear mechanisms followed a matrix erosion pattern accompanied by ceramic grain removal.

本文言語English
ページ(範囲)201-210
ページ数10
ジャーナルWear
364-365
DOI
出版ステータスPublished - 2016 10 15
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 表面および界面
  • 表面、皮膜および薄膜
  • 材料化学

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