| Autor: |
Stefan Svoboda, Wan Aiman Ahmad Akhtar, Janka Seeger, Annett Dorner-Reisel, Guido Reisel |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Surface and Coatings Technology. 424:127619 |
| ISSN: |
0257-8972 |
| DOI: |
10.1016/j.surfcoat.2021.127619 |
| Popis: |
Piezo-element integration in WC-NiCr and Cr3C2-NiCr thermally sprayed coatings resulted in electric voltage curves, which can provide information about the wear and friction condition in the tribological contact zone. The coatings were produced by high-velocity oxy fuel (HVOF) spraying with a thickness of 350 μm. The thermal sprayed coatings provided good wear protection of the embedded piezo-elements. The electrical energy outcome was slightly higher for the more wear resistant WC-NiCr coatings under dry sliding with a WC-12Co ball. The Cr3C2-NiCr coatings are known to give a better wear resistance at higher temperatures, but exhibit an inferior behaviour in comparison to WC-NiCr coatings at room temperature. This tendency was observed and is very well mirrored by the shape of electric voltage and the electric signal output at room temperature. Piezo-element integration was carried out after HVOF spraying embedding the 200 μm thick piezo-elements into cross-sectional slit which was produced by wire erosion. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect