Abstract No.:
5741

 Scheduled at:
Friday, June 09, 2017, Hall 28 10:20 AM
Modeling & Simulation II


 Title:
Processing of sub-micron sized ceramic particles at room temperature by aerosol deposition (AD) process

 Authors:
Tarini Prasad Mishra* / Forschungszentrum Jülich GmbH, Germany
Robert Mücke / Institute of Energy and Climate Research (IEK-1), Forschungszentrum Jülich GmbH, Germany
Reeti Singh/ Institute of Energy and Climate Research (IEK-1), Forschungszentrum Jülich GmbH, Germany
Jürgen Malzbender/ Institute of Energy and Climate Research (IEK-2), Forschungszentrum Jülich GmbH, Germany
Robert Vaßen/ Institute of Energy and Climate Research (IEK-1), Forschungszentrum Jülich GmbH, Germany

 Abstract:
Aerosol Deposition (AD) process is a novel deposition technique to deposit the ceramic materials with high deposition rate at the room temperature. The bonding of the deposited ceramic particles is based on a shock-loading solidification, resulted from the impaction of ceramic particles.

In the current study, submicron sized Yttria Stabilized Zirconia (YSZ) powder was successfully deposited by aerosol deposition process. The processing parameters for successful deposition of YSZ powder were thoroughly studied. Effect of several aerosol deposition process parameters on the coating thickness, interface quality, and coating microstructure has been investigated. A window of deposition for YSZ powder with respect to carrier gas flow could be determined. It has been observed that the coating porosity decreases with increase in the carrier gas flow. An investigation of the mechanical properties of YSZ coatings e.g. hardness and elastic modulus was carried out by using nano-indentation technique. A variation in the mechanical properties has been observed as a function of distance from the interface. CFD simulations have been used to calculate the particle velocity and to study the flow behaviour of spray plume after the nozzle exit.


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