Comparison between plasma- and HVOF-sprayed ceramic coatings. Part II: tribological behaviour. (10th May 2007)

• Record Type: Journal Article
• Authors: Bolelli, G.; Lusvarghi, L.; Manfredini, T.; Pighetti Mantini, F.; Turunen, E.; Varis, T.; Hannula, S-P.
• Is Part Of: International journal of surface science and engineering. Volume 1:Number 1(2007)
• Page Start: 62
• Page End: 79
• Publication Date: 2007-05-10
• Subjects: high velocity oxygen fuel -- HVOF flame spraying -- plasma spraying -- ceramic coatings -- -- tribology -- Al2O3 -- Cr2O3 -- pin-on-disk wear tests -- dry particles abrasion tests -- dry sliding -- silicon carbide -- brittle cracking -- brittle fracture -- tribofilms; Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Surfaces (Technology) -- Periodicals; Tribology -- Periodicals; 530.417
• Languages: English
• ISSNs: 1749-785X

Abstract

This is the second part of comparative study between High Velocity Oxygen-Fuel (HVOF) flame-sprayed and Atmospheric Plasma-Sprayed (APS) ceramics. Dry particles abrasion test and dry sliding wear test at room temperature, 400?C and 700?C are performed. In dry sliding against SiC, at room temperature stable tribofilms are formed and mild wear (10-6 mm?/(Nm)) occurs for all coatings. When temperature and normal load increase, making brittle cracking a significant wear mechanism, HVOF coatings become superior to APS ones, thanks to higher toughness. In dry particles abrasion, brittle fracture prevails; therefore, the tougher HVOF coatings outperform APS ones.