Abstract No.:
2859

 Scheduled at:
Tuesday, September 27, 2011, Saal A 11:25 AM
Aviation Industry 1


 Title:
Thermal barrier layers in rocket engines development and testing

 Authors:
Dennis Soysal* / German Aerospace Center (DLR - Deutsches Zentrum für Luft- und Raumfahrt), Germany
Asif Ansar / German Aerospace Center, Germany
Thomas Bauer/ German Aerospace Center, Germany
Michele Negri/ German Aerospace Center, Germany
Helmut Ciezki/ German Aerospace Center, Germany

 Abstract:
Thermal barrier coatings have been used in many temperature critical applications like gas turbines and aero engines as a form of exhaust heat management to increase temperature resistance of sensitive components. Recent developments in rocket engines have shown the need to reduce heat flux into the injection plate.
To achieve this heat insulation fuel injection plate has to be coated with a thermal barrier layer. Requirements are a low thermal conductivity, high melting material withstanding more than 3000K and an optimally adopted CTE value to fit the injector plate made of stainless steel. At DLR a new coatings were developed and tested in real life conditions in a trust chamber. These coatings were obtained by plasma spraying of different powders at different conditions. As insulating material 3YSZ and DySZ were sprayed and 300µm thick coatings were acquired. For these layers the thermal conductivity and porosity is measured and correlated to the obtained microstructure.


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