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| Abstract No.: |
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Scheduled at:
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Tuesday, May 04, 2010, Sophia Room 4:00 PM
Gas Turbines 2
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| Title: |
Characterization of elastic plastic properties of thermal sprayed NiCoCrAlY coatings
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| Authors: |
Per Nylen / University West, Sweden
Angelica Fasth* / University West, Sweden
Radek Musalek/ Institute of Plasma Physics AS CR, Czech Republic
Nicolaie Markocsan/ University West, Sweden
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| Abstract: |
Thermo-mechanical properties of a thermal barrier bond coat play an important role in governing the lifetime of a coating system. The present work aims to determine these properties for NiCoCrAlY coatings sprayed on Hastaloy X substrates under different process conditions. Two Atmospheric Plasma Sprayed (APS) coatings are compared with two HVOF sprayed coatings utilising the four-point bending test. Particular attention has been paid to microstructure-property relationships during heating. The temperature dependence of Young´s modulus is measured up to 1000°C and non-linear material behaviour and hysteresis is evaluated for coatings loaded in both tension and compression. Results are discussed in the context of the effect of feedstock material, process conditions and microstructure characteristics. The methods and results presented are attractive, particularly for the Thermal spray industry, since these properties are a prerequisite when the coating system is to be considered in the design of a component.
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