| 압입시험법에 의한 YSZ 층상 열차폐 코팅재의 기계적 거동 |
| 이동헌, 이기성 |
| 국민대학교 기계시스템공학부 기계설계 |
| Mechanical Behavior of Layered YSZ Thermal Barrier Coatings using Indentation Test |
| Dong-Heon Lee, Kee-Sung Lee |
| School of Mechanical Systems Engineering, Kookmin University |
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| ABSTRACT |
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In this study, we investigated the mechanical behaviors of layered thermal barrier coatings by indentations. Various single and double-layered thermal barrier coatings were deposited by air plasma spray process using different type of commercialized YSZ (Yttria stabilized zirconia) starting powders. Indentation stress-strain curve, load-displacement curve and hardness of the single and the double-layered thermal barrier coatings were obtained experimentally and analyzed. The indentation damages at the same loads were compared, and thus, the results depend on the structure of each coating. The result indicates improvement in damage resistances from tailoring of layered structures in the component of gas turbine system is expected. |
| Key words:
Thermal barrier coatings, Gas turbine, Hertzian contact, Indentation |
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