Effects of Shot Peening Process on T

Effects of Shot Peening Process on Thermal Cycling Lifetime of TBCs Prepared by EB-PVD

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.

作 者： ZHOU Zhao-hui GONG Sheng-kai LI He-fei XU Hui-bin ZHANG Chun-gang WANG Lu   作者單位： ZHOU Zhao-hui,GONG Sheng-kai,LI He-fei,XU Hui-bin(School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China)

ZHANG Chun-gang,WANG Lu(Shenyang Liming Aero-Engine Group Corporation, Shenyang 110043, China) 

刊 名： 中國航空學(xué)報(bào)(英文版)  ISTIC 英文刊名： CHINESE JOURNAL OF AERONAUTICS  年，卷(期)： 2007 20(2)  分類號： V2  關(guān)鍵詞： thermal cycling lifetime   shot peening   thermal barrier coatings (TBCs)  

【Effects of Shot Peening Process on T】相關(guān)文章：

long shot風(fēng)險(xiǎn)大的賭注05-04

Cause and Effects of Iron Deficiencies05-04

Effects of Formaldehyde Inhalation on Lung of Rats04-27

第212講：over the long haul / long shot05-04

Some characteristics of the atmosphere during an adiabatic process04-26

Environmental Effects on Microstructural Stability of SiC/SiC Composites04-26

Evaluation of dust activity and climate effects in North China04-26

Biological removal of methanol from process condensate for the purpose of reclamation04-26

Physicochemical interaction and its influence on deep bed filtration process04-26

Effects of sleep deprivation on gamma oscillation of waking human EEG04-26