| Home | Log-in | Admin | Sitemap |
Home | Program | Detailed Program
Detailed Program
Paper Number : AD-I06
Time Frame : 17:35~18:00
Presentation Date : Thurseday, 27, November
Session Name : Advanced Coating for Gas Turbines
Session Chair 1# : Keesung Lee
Session Chair 2# : Byung-Koog Jang
Growth behavior of YSZ thermal barrier coatings based on the substrate condition and heat treatment by electron beam evaporation method
Yoonsuk Oh
Korea Institute of Ceramic Engineering and Technology
A thermal barrier coating (TBC) can provide higher durability on alloy metal parts worked in turbine system for power plant or airfoil engines [1]. For this TBC, Yttria stabilized zirconia (YSZ) and plasma sprays are conventionally used as a coating material and coating technology, respectively. Electron beam physical vapor deposition (EBPVD), one of the advanced coating technology, has been attention for its structural stability by increase of strain tolerance at high temperature operation condition [2]. During the deposition, control of column structure and pore distribution is a critical factor to promote optimization of coating structure.

Figure 1 XRD data of 4YSZ coatings with different rotation condition.

In this study, YSZ based thermal barrier coatings are fabricated by EBPVD with different substrate rotation condition. Phase formation, microstructures, and interface analysis are examined with the deposited condition and post heat-treatments. Column structure of coating is strongly affected by rotation condition differ from the phase forming behavior.

References:

[1] N. P. Padture et al, Science, 296, 280-284 (2002).
[2] J. Singh and D. E. Wolfe, J. Mater. Sci., 40, 1-26 (2005).

Acknowledgements : This research was supported by a grant from the Fundamental R&D Program for Strategic Core Technology of Materials funded by the Ministry of Trade, Industry and Energy and by a grant from the Basic and Strategic R&D Program funded by the Korea Institute of Ceramic Engineering and Technology, Republic of Korea.