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| Abstract No.: |
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Scheduled at:
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Thursday, September 29, 2011, Saal A 2:25 PM
Aviation Industry 4
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| Title: |
Impact of particle size distribution on the TBC coating deposition and performance
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| Authors: |
Li Li* / Praxair Surface Technologies, Inc, USA
Vlad Belov / Praxair Surface Technologies, USA
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| Abstract: |
Thermal barrier coating (TBC) functioning in aviation and power generation industry has been heavily relied on plasma spraying yttria stabilized zirconia (YSZ) onto MCrAlY bond coated engine components. Among all those factors which may impact the repeatability and the reliability of a TBC coating, powder feedstock is kind of the most important yet hardly controlled constituent as it is impractical to keep the powder chemistry, format and size distribution exact the same from one lot to another, year after year. In this study the authors systematically vary the size distribution of one type of commercial YSZ powder to explore the effect of the size distribution on the TBC deposition and the coating performance. Deposition rate and efficiency are quantitatively compared cross those experimental powders. The coating microstructures and performances out of the different sizing are also evaluated analytically. Understanding the impact of the powder variation on the coating deposition and performance is essential to help determine the particular quality control standards as well as trouble shoot premeditated thermal spray processes.
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