Tribological behaviours of 8YSZ coating sliding against different counterparts

ABSTRACT

Zr-based ceramic coatings were widely used as mechanical components due to their excellent properties. In this study, the tribological behaviours and wear mechanism of 8YSZ coating sliding against different counterpart materials (Al₂O₃ and stainless steel) under dry conditions were discussed, which would provide theoretical and experimental basis for selecting the optimal friction pair mate in practical engineering application. The hardness of the 8YSZ coating was tested by nano-indentation apparatus, and then elastic recovery and plastic deformation resistance were calculated. By investigating the relations of hardness to wear rate, the best combination of friction pair was ascertained. Results indicated that the 8YSZ coating sliding against various counterparts exhibited different tribological behaviours, which was closely related to the mechanical properties of counterpart material. The main wear mechanism of 8YSZ coating sliding against Al₂O₃ ball was brittle fracture and abrasive wear, while that of metal counterpart was adhesive wear accompanied by abrasive wear.

KEYWORDS:

• 8YSZ coating
• plasma spraying
• tribological behaviours
• different counterparts

Disclosure statement

No potential conflict of interest was reported by the author(s).

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.