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| Abstract No.: |
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| Title: |
Scratch test mechanical properties of suspension plasma sprayed TiO2 coatings
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| Authors: |
Lech Pawlowski* / University of Limoges, SPCTS UMR 6638, France
Leszek Latka / University of Limoges/ SPCTS, France
Fabrice Petit/ Belgian Ceramic Research Centre, Belgium
Stefan Kozerski/ Wroclaw University of Technology/Institute of Welding, Poland
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| Abstract: |
Titanium oxide coatings were suspension plasma sprayed onto different substrates. The suspension was formulated using fine rutile pigment in the mixture of water with ethanol. The zeta potential of the suspension was determined. The spray process parameters were designed using a full factorial plan using spray distance and torch scan velocity as the variables. The temperature at spray process was monitored using a pyrometer. The X-ray diffraction (XRD) analysis enabled to find out the crystal phases in sprayed deposits and, in particular, the anatase content. Scanning electron microscope (SEM) enabled to characterize the coatings microstructure. The coatings included well molted lamellas and the zones of loosely agglomerated and sintered grains. The scratch test of the coatings enabled to determine their mechanical properties such as critical load, scratch hardness and friction coefficient. Moreover, the roughness of the coatings surfaces was determined.
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