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| Abstract No.: |
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Scheduled at:
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Thursday, September 29, 2011, Saal C2.1 10:15 AM
Tribological Coatings 2
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| Title: |
Tribological properties of HVOF sprayed nanostructured composite coatings
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| Authors: |
Wojciech Zórawski* / Kielce University of Technology, Poland
Tadeusz Burakowski/ , Warsaw, Poland
StanisBaw Skrzypek/ , Cracow, Poland
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| Abstract: |
Nanostructured materials are of particular scientific interest because of their physical and mechanical properties, which are superior to those of conventional materials. They are more widely used in various industrial applications mainly due to decreasing production costs.
The work is concerned with a study of the tribological properties of a HVOF sprayed composite of nanostructured WC12Co mixed in various proportions with nanostructured Fe3O4, having the properties of solid lubricant. The coatings were sprayed by means of a Hybrid Diamond Jet system. A T-01 ball on disc tribological tester was used to study their resistance to wear and determine the coefficient of friction on the basis of friction force obtained in the course of continuous measurement at a set load. Result of investigations were compared with properties of coatings sprayed with standard WC12Co/ Fe3O4. The microstructure and composition of nanostructured powders and coatings were analyzed by SEM FEI Novaä NanoSEM 200 and TEM Philips CM20 with EDAX EDX. Their phase composition was studied using a Bruker D8 Advance diffractometer. The influence of Fe3O4 content in mixture on the coefficient of friction, hardness and surface roughness was investigated too.
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