Wear behaviour of APS and HVOF sprayed ceramic coatings

G. Bolelli, V. Cannillo, L. Lusvarghi, Erja Turunen, Tommi Varis, Teppo Fält, Simo-Pekka Hannula

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


Plasma sprayed oxides are effective coatings against wear and corrosion. Low particle velocity in the plasma jet causes a limited interlamellar cohesion. HVOF-sprayed ceramic coatings emerged as an improved alternative. In this paper, microstructural characteristics and tribological performances of HVOF sprayed Al2O3, nanostructured Al2O3 and Cr2O3 coatings are compared to reference plasma-sprayed Al2O3 and Cr2O3. The microstructure is analysed by SEM, EDS and XRD. Hardness and fracture toughness are investigated by instrumented indentation and elastic modulus by 3-point bending. Steel wheel and rubber wheel tests have been used to assess dry particle abrasion resistance. Sliding wear resistance is tested by pin-on-disk at room temperature and at 400°C, against SiC and 100Cr6 steel balls. HVOF-sprayed coatings are denser and have better interlamellar cohesion thanks to increased particle velocity. They are harder, tougher, possess a higher elastic modulus and lower porosity. Dry particles abrasion resistance is definitely superior to plasma-sprayed ceramics due to higher toughness; sliding wear resistance is higher, particularly at 400°C.
Original languageEnglish
Title of host publicationProceedings of the International Thermal Spray Conference
Subtitle of host publicationThermal Spray 2006
PublisherASM International
Number of pages6
ISBN (Print)978-087-17085-2-6
Publication statusPublished - 2006
MoE publication typeA4 Article in a conference publication
EventInternational Thermal Spray Conference, ITSC 2006 - Seattle, United States
Duration: 15 May 200618 May 2006


ConferenceInternational Thermal Spray Conference, ITSC 2006
CountryUnited States

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