| Effects of Shot Peening Process on Thermal Cycling Lifetime of TBCs Prepared by EB-PVD |
| |
| 作者姓名： | ZHOU Zhao-hui GONG Sheng-kai LI He-fei XU Hui-bin ZHANG Chun-gang WANG Lu |
| |
| 作者单位： | ZHOU Zhao-huia，GONG Sheng-kaia，LI He-feia，XU Hui-bina，ZHANG Chun-gangb，WANG Lub aSchool of Materials Science and Engineering，Beijing University of Aeronautics and Astronautics，Beijing 100083，China bShenyang Liming Aero-Engine Group Corporation，Shenyang 110043，China |
| |
| 摘 要： | Conventional two-layered thermal barrier coatings (TBCs) are prepared by electron beam physical vapor deposition (EB-PVD) with ZrO2-8 wt% Y2O3 (8YSZ) as top coat and CoCrAlY as bond coat on disk-shaped Ni based super-alloy. In this paper, three kinds of shot peening process with different lengths of operating time were adopted for bond coating. As a result, changes took place in its sur- face roughness and the surface micro-hardness. A thermal cycling test at 1 273 K×55 min and another at room temperature for 5 min were performed to study the effects of shot peening process on the thermal cycling lifetime of TBCs. It is found that a moderate shot peening process will be able to prolong the life time. The oxidation dynamic of the as-processed TBCs basically accords with the para- bolic rule, and the oxidation test also attests to the spallation between YSZ and thermal growth oxide (TGO) responsible mainly for the failure of TBCs.
|
| 关 键 词： | 热循环 喷射功能 隔热覆盖层 飞机设计 |
| 收稿时间： | 10 August 2006 |
| 修稿时间： | 2006-08-102006-11-20 |
Effects of Shot Peening Process on Thermal Cycling Lifetime of TBCs Prepared by EB-PVD |
| |
| ZHOU Zhao-hui GONG Sheng-kai LI He-fei XU Hui-bin ZHANG Chun-gang WANG Lu.Effects of Shot Peening Process on Thermal Cycling Lifetime of TBCs Prepared by EB-PVD[J].Chinese Journal of Aeronautics,2007,20(2):145-147. |
| |
| Authors: | ZHOU Zhao-hui GONG Sheng-kai LI He-fei XU Hui-bin ZHANG Chun-gang WANG Lu |
| |
| Institution: | 1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;2. Shenyang Liming Aero-Engine Group Corporation, Shenyang 110043, China |
| |
| Abstract: | Conventional two-layered thermal barrier coatings (TBCs) are prepared by electron beam physical vapor deposition (EB-PVD)with ZrO2-8 wt% Y2O3 (8YSZ) as top coat and CoCrAlY as bond coat on disk-shaped Ni based super-alloy. In this paper, three kinds of shot peening process with different lengths of operating time were adopted for bond coating. As a result, changes took place in its surface roughness and the surface micro-hardness. A thermal cycling test at 1 273 K×55 min and another at room temperature for 5 min were performed to study the effects of shot peening process on the thermal cycling lifetime of TBCs. It is found that a moderate shot peening process will be able to prolong the life time. The oxidation dynamic of the as-processed TBCs basically accords with the parabolic rule, and the oxidation test also attests to the spallation between YSZ and thermal growth oxide (TGO) responsible mainly for the failure of TBCs. |
| |
| Keywords: | thermal cycling lifetime shot peening thermal barrier coatings (TBCs) TBCs Lifetime Thermal Cycling Process Shot Peening failure spallation thermal cycling growth oxide oxidation dynamic parabolic rule able life time room temperature study effects lifetime |
| 本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录！ |
