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Detailed Program (Poster)

The 2nd International Conference & Exhibition for Nanopia

Code No. ME-P82
Name Dr. Zhe Lu
Affiliation 1School of Materials Science and Engineering
Title Thermal Durability of Thermal Barrier Coatings with Blended Feedstock of Lanthanum Zirconate in cyclic thermal exposure
File of Abstract
Co-author-1PrefixMr.
CountryKorea
First nameSung-Hoon
Last nameJung
Affiliation
Department
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Co-author-2PrefixMr.
Country
First nameDo-won
Last nameSong
AffiliationHanyang University
DepartmentDepartment of Energy Engineering
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Co-author-3PrefixProf.
CountryKorea
First nameYeon-Gil
Last nameJung
AffiliationChangwon National University
DepartmentSchool of Nano and Advanced Materials Engineering
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Contents
Lanthanum zirconate (La2Zr2O7) is very promising material for advanced thermal barrier coating (TBC) application, because it has lower thermal conductivity and greater sintering resistance than yttria-stabilized-zirconia (YSZ). However, TBC system with La2Zr2O7 shows a low thermal durability due to the lower coefficient of thermal expansions compared with that of a bond coat. To improve the thermal durability of La2Zr2O7 based TBCs and to give both thermal and mechanical properties to TBCs, microstructure was designed with blended feedstock powders which were consisted of La2Zr2O7 and YSZ with different volume ratios (50:50 and 25:75). Layered microstructure with a buffer layer was deposited by air plasma spray method, and then thermal durability of each TBC was evaluated through the cyclic furnace thermal fatigue (CFTF) and flame thermal fatigue (FTF) tests. The TBC with the buffer layer showed improved thermal durability than single layered TBC in the both cycling thermal exposure tests. The relationship between microstructure design and thermal durability is extensively discussed based on the thermomechanical properties and microstructural evolution during cyclic thermal exposure.

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