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1140 |
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Monday, June 02, 2008, Room 08 3:40 PM Plasma Spraying and Plasma Transferred Arc 2 New trends and modified plasma processes for the application of ceramic-based coatings |
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Influence of the spray angle on characteristics for atmospheric plasma sprayed hard material based coatings
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Benjamin Krebs* / Institute of Materials Engineering
Faculty of Mechanical Engineering
Technical University of Dortmund, Germany Wolfgang Tillmann / Institute of Materials Engineering, Germany Evelina Vogli/ Institute of Materials Engineering, Germany |
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Thermal spraying technology has been applied in many industrial sectors because of its manifold potentials in the area of economical, thick and large area coatings. A main field of application for thermal spraying technologies is wear and corrosion protection of components with complex geometries like forming dies, turbine blades or rotors. In many cases, it is not possible to coat with a perpendicular spray angle on free formed surfaces, because these components feature geometries with difficult areas (narrow points, slots, etc.) to coat. Therefore, it is of particular importance to investigate coating characteristics depending on the spray angle. Based on these results, it is feasible to determine an extent of tolerance in which coatings show reproducible properties. In this paper the influence of the spray angle on coating characteristics like thickness, morphology, topography, adhesion, hardness as well as ratio and distribution of hard materials in different coating system is investigated. The applied thermal spraying technology is the atmospheric plasma spraying (APS). The employed materials are heat treated steel (C45) as substrate and hard material based alloy powders as coating feedstock. |