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| Abstract No.: |
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Scheduled at:
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Thursday, June 11, 2020, Hall G2 3:40 PM
Aviation Industry IV
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| Title: |
Exploring the behaviors of erosion and thermal cyclic shock for the development of phase composite thermal barrier coating
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| Authors: |
Xinqing Ma* / Curtiss-Wright, United States of America
K Rivellini / CWST, USA
P Ruggiero/ CWST, USA
G Wildridge/ IMR Test Lab, USA
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| Abstract: |
A new concept of phase composite ceramic had been proposed for the topcoat of a durable thermal barrier coating (TBC) system which is one of the critical technologies for advanced turbine engines. This innovative ceramic material had been manufactured into TBCs by air plasma spray, and further its properties and performances were investigated on process efficiency, isothermal oxidation, rapid heating/quenching, as well as sintering at elevated temperatures. The results demonstrated the overall superiority of the TBC in improved durability, material affordability, process efficiency, thermal stability and low thermal conductivity capability over conventional single-phase zirconia based TBCs. The present work is to continue the effort to exploring the behaviors of erosion and thermal cyclic shock. In erosion test, the investigation was focused on the most important characteristics of erosion, including the variations of erosion damages with impingement angle and with the effect of high temperature sintering. The erosion mechanisms were discussed based on the 3D metrological analyses of the eroded surfaces. In thermal cyclic shock test, the TBC was exposed to a rapidly thermal cycling condition introduced by a high velocity and temperature combustion torch, and the TBCs damages and failure modes were identified and explained in terms of microstructural observation and mechanism discussion.
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