Abstract No.:	2085
Scheduled at:	Tuesday, May 04, 2010, Sophia Room 2:30 PM Young Scientists
Title:	Relations between in flight particle characteristics and coating properties by HVOF spraying
Authors:	Birger Hussong* / TU-Dortmund/institute for materials science, Germany Wolfgang Tillmann / Technische Universität Dortmund / Lehrstuhl für Werkstofftechnologie Fakultät Maschinenbau, Germany Evelina Vogli/ Technische Universität Dortmund / Lehrstuhl für Werkstofftechnologie Fakultät Maschinenbau, Germany
Abstract:	Thermal spraying technology still suffers from a lack of reproducibility due to uncontrollable factors during the process. Current methods of process control by observing process parameters like gas- and powderflow are insufficient to guarantee constant quality of coatings, while a direct analysis of the deposited layer is time-consuming and can only be conducted after the process. Furthermore, recently developed mathematical models which correlate process parameters to coating properties are not applicable for all materials. As the particles? behavior during process affects coating properties, an indirect process control through observation of the particles seems expedient. This method is applicable on running processes and thus avoids defective production. In this study, HVOF spraying experiments were conducted. The in-flight particles? behavior was investigated using optical diagnostic systems, while coating properties were analysed by metallographical methods.

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