Novel thermal barrier coatings repel and resist molten silicate deposits

2019 ◽  
Vol 163 ◽  
pp. 71-76 ◽  
Author(s):  
Baopeng Zhang ◽  
Wenjia Song ◽  
Liangliang Wei ◽  
Yuxuan Xiu ◽  
Huibin Xu ◽  
...  
Keyword(s):  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Molten Silicate ◽  
Silicate Deposits

scholarly journals Response of molten silicate infiltrated Gd2Zr2O7 thermal barrier coatings to temperature gradients

2017 ◽  
Vol 132 ◽  
pp. 538-549 ◽  
Author(s):  
R. Wesley Jackson ◽  
Elisa M. Zaleski ◽  
Brian T. Hazel ◽  
Matthew R. Begley ◽  
Carlos G. Levi
Keyword(s):  
Thermal Barrier Coatings ◽  
Temperature Gradients ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Molten Silicate

Molten silicate interactions with thermal barrier coatings

2014 ◽  
Vol 251 ◽  
pp. 74-86 ◽  
Author(s):  
Hengbei Zhao ◽  
Carlos G. Levi ◽  
Haydn N.G. Wadley
Keyword(s):  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Molten Silicate

Buckling failure in air-plasma sprayed thermal barrier coatings induced by molten silicate attack

2016 ◽  
Vol 113 ◽  
pp. 71-74 ◽  
Author(s):  
Xiao Shan ◽  
Zhonghua Zou ◽  
Lijian Gu ◽  
Lixia Yang ◽  
Fangwei Guo ◽  
...  
Keyword(s):  
Thermal Barrier Coatings ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Barrier Coatings ◽  
Buckling Failure ◽  
Molten Silicate ◽  
Plasma Sprayed

Characterization of thermal barrier coatings formed by electon-beam physical vapor deposition (EB-PVD)

1989 ◽  
Vol 47 ◽  
pp. 426-427
Author(s):  
Ozer Unal
Keyword(s):  
Thermal Barrier Coatings ◽  
Physical Vapor Deposition ◽  
Ceramic Coating ◽  
High Vacuum ◽  
Ceramic Coatings ◽  
High Energy ◽  
Thermal Barrier ◽  
Protective Oxide ◽  
Barrier Coatings ◽  
Energy Beam

Interest in ceramics as thermal barrier coatings for hot components of turbine engines has increased rapidly over the last decade. The primary reason for this is the significant reduction in heat load and increased chemical inertness against corrosive species with the ceramic coating materials. Among other candidates, partially-stabilized zirconia is the focus of attention mainly because ot its low thermal conductivity and high thermal expansion coefficient.The coatings were made by Garrett Turbine Engine Company. Ni-base super-alloy was used as the substrate and later a bond-coating with high Al activity was formed over it. The ceramic coatings, with a thickness of about 50 μm, were formed by EB-PVD in a high-vacuum chamber by heating the target material (ZrO2-20 w/0 Y2O3) above its evaporation temperaturef >3500 °C) with a high-energy beam and condensing the resulting vapor onto a rotating heated substrate. A heat treatment in an oxidizing environment was performed later on to form a protective oxide layer to improve the adhesion between the ceramic coating and substrate. Bulk samples were studied by utilizing a Scintag diffractometer and a JEOL JXA-840 SEM; examinations of cross-sectional thin-films of the interface region were performed in a Philips CM 30 TEM operating at 300 kV and for chemical analysis a KEVEX X-ray spectrometer (EDS) was used.

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