Stress- and Nanostructure-Imaging of Ceramic Fibers and Abradable Thermal Barrier Coatings by Raman Microspectrometry-State of the Art and Perspectives

2008 ◽  
pp. 143-153 ◽  
Author(s):  
Philippe Colomban
Keyword(s):  
Thermal Barrier Coatings ◽  
State Of The Art ◽  
Thermal Barrier ◽  
Ceramic Fibers ◽  
Barrier Coatings ◽  
Raman Microspectrometry

Ceramic Fibers Reinforced Functionally Graded Thermal Barrier Coatings

2017 ◽  
Vol 19 (8) ◽  
pp. 1700149 ◽  
Author(s):  
Chang Wang ◽  
Xiufang Cui ◽  
Guo Jin ◽  
Zonghong Gao ◽  
Jiannong Jin ◽  
...  
Keyword(s):  
Thermal Barrier Coatings ◽  
Functionally Graded ◽  
Thermal Barrier ◽  
Ceramic Fibers ◽  
Barrier Coatings

NASA ECI Programs: Benefits to Pratt & Whitney Engines

1982 ◽  
Author(s):  
W. O. Gaffin
Keyword(s):  
Performance Improvement ◽  
Thermal Barrier Coatings ◽  
Energy Efficient ◽  
State Of The Art ◽  
Thermal Barrier ◽  
High Pressure Turbine ◽  
Improvement Program ◽  
Barrier Coatings ◽  
Engine Component ◽  
Clearance Control

The NASA-sponsored Engine Component Improvement (ECI) Performance Improvement Program at Pratt & Whitney advanced the state-of-the-art of thermal barrier coatings and ceramic seal systems, demonstrated the practicality of an advanced turbine clearance control system and an advanced fan design in the JT9D engine, and demonstrated the advantages of modern cooling, sealing and aerodynamic designs in the high pressure turbine and compressor of the JT8D engine. Several of these improvements are already in airline service in JT8D and JT9D engines and others will enter soon in advanced models of these engines. In addition, the technology advances are being transferred to completely new engine configurations, the PW2037 and the NASA-sponsored Energy Efficient Engine (E3).

Thermal Barrier Coatings—A State of the Art Review

2020 ◽  
Author(s):  
Jayant Gopal Thakare ◽  
Chandan Pandey ◽  
M. M. Mahapatra ◽  
R. S. Mulik
Keyword(s):  
Thermal Barrier Coatings ◽  
State Of The Art ◽  
Thermal Barrier ◽  
Barrier Coatings

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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