| 알루미나에 YSZ가 나노코팅된 층상형 시스템의 인덴테이션 특성평가 |
| 김상겸, 김태우, 김철1, 신태호2, 한인섭2, 우상국2, 이기성 |
국민대학교 기계자동차공학부 기계설계전공
1국민대학교 기계자동차공학부 기계설계전공
2한국에너지 기술연구원 에너지재료연구센터 |
| Indentation of YSZ/Al2O3 Layered Systems Prepared by Nano-Coating |
| Sang-Kyum Kim, Tae-Woo Kim, Chul Kim1, Tae-Ho Shin2, In-Sub Han2, Sang-Kuk Woo2, Kee-Sung Lee |
School of Mechanical and Automotive Engineering, Kookmin University
1Energy Materials Research Center, Korea Institute of Energy Research
2Energy Materials Research Center, Korea Institute of Energy Research |
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| ABSTRACT |
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YSZ layer containing nano-sized particles has been deposited on the commercial A1203 substrate by Electron Beam Physical Vapor Deposition (EB-PVD). The role of coating rnjcrostructures of YSZ to indentation damage is studied. The different coating microsouctures are prepared by varying the substrate temperatures from $600^{circ}C$ to $800^{circ}C$ during the deposition. Microhardness test and Hertzian indentation are conducted on the $YSZ/Al_{2}O_{3}$ layered systems. The damage and flilure behaviors have been investigated according to the effect of microstructures and indentation loads. With increasing the substrate temperature during EB-PVD, the overall grain sizes are coarser and more faceted, which microsoucture ultimately influences on the indentation behavior, thus, YSZ/Al_{2}O_{3}$ layered system prepared at the substrate temperature of $800^{circ}C$ shows relatively higher damage tolerance. |
| Key words:
Nano-coating, YSZ, EB-PVD, Indentation, Microstructure |
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