Properties of alumina-based coatings deposited by plasma spray and detonation gun spray processes
In: Journal of Thermal Spray Technology, Jg. 3 (1994-06-01), Heft 2, S. 199-203
Online
serialPeriodical
Zugriff:
Alumina, Al2O3+ 3 to 40 wt% TiO2, and Al2O3+ 40 wt% ZrO2coatings were deposited by atmospheric plasma spraying (APS) and detonation gun spraying (DGS). The coatings were evaluated by optical microscopy, microhardness measurements, and X- ray diffraction. Wear resistance of the coatings was evaluated by rubber wheel sand abrasion and particle erosion test methods. Detonation gun- sprayed coatings exhibited more homogeneous microstructures and somewhat higher microhardness than corresponding plasma- sprayed coatings. Small additions of TiO2(3 wt%) improved both the abrasion and erosion wear resistance, whereas 40 wt% TiO2significantly decreased the erosion wear resistance of both APS and DGS coatings. Alumina + 40% ZrO2coatings exhibited the best abrasion wear resistance of both APS and DGS coatings, but the erosion wear resistance of these coatings was lower than that of the Al2O3and Al2O3+ 3 wt% TiO2coatings. The best abrasion wear resistance of the coatings studied was obtained with DGS Al2O3+ 40 wt% ZrO2and Al2O3+ 3 to 40 wt% TiCh coatings. These coatings exhibited lower wear rates than bulk Al2O3. The best erosion wear resistance was obtained with the DGS Al2O3+ 3 wt% TiO2coating; however, it exhibited a higher wear rate than bulk Al2O3. In general, detonation gun- sprayed coatings showed significantly enhanced abrasion and erosion wear resistance than the corresponding plasma- sprayed coatings.
Titel: |
Properties of alumina-based coatings deposited by plasma spray and detonation gun spray processes
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Autor/in / Beteiligte Person: | Niemi, K. ; Vuoristo, P. ; Mäntylä, T. |
Link: | |
Zeitschrift: | Journal of Thermal Spray Technology, Jg. 3 (1994-06-01), Heft 2, S. 199-203 |
Veröffentlichung: | 1994 |
Medientyp: | serialPeriodical |
ISSN: | 1059-9630 (print) ; 1544-1016 (print) |
DOI: | 10.1007/BF02648279 |
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