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Modification of NiCoCrAlY with Pt: Part II. Application in TBC with pure metastable tetragonal (t ') phase YSZ and thermal cycling behavior
Yu, Chuntang; Liu, He; Jiang, Chengyang; Bao, Zebin; Zhu, Shenglong; Wang, Fuhui
2019-03-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume35Issue:3Pages:350-359
AbstractA thermal barrier coating system comprising Pt-modified NiCoCrAlY bond coating and nanostructured 4 mol.% yttria stabilized zirconia (4YSZ, hereafter) top coat was fabricated on a second generation Ni-base superalloy. Thermal cycling behavior of NiCoCrAlY-4YSZ thermal barrier coatings (TBCs) with and without Pt modification was evaluated in ambient air at 1100 degrees C up to 1000 cycles, aiming to investigate the effect of Pt on formation of thermally grown oxide (TGO) and oxidation resistance. Results indicated that a dual layered TGO, which consisted of top (Ni,Co)(Cr,Al)(2)O-4 spinel and underlying alpha-Al2O3, was formed at the NiCoCrAlY/4YSZ interface with thickness of 8.4 mu m, accompanying with visible cracks at the interface. In contrast, a single-layer and adherent alpha-Al2O3 scale with thickness of 5.6 mu m was formed at the interface of Pt-modified NiCoCrAlY and 4YSZ top coating. The modification of Pt on NiCoCrAlY favored the exclusive formation of alpha-Al2O3 and the reduction of TGO growth rate, and thus could effectively improve overall oxidation performance and extend service life of TBCs. Oxidation and degradation mechanisms of the TBCs with/without Pt-modification were discussed. (C) 2018 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordPt-modification NiCoCrAlY Thermal barrier coating (TBC) Thermal cycling Thermally grown oxide (TGO)
Indexed BySCI
Language英语
WOS IDWOS:000454506800016
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81346
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Yu, Chuntang,Liu, He,Jiang, Chengyang,et al. Modification of NiCoCrAlY with Pt: Part II. Application in TBC with pure metastable tetragonal (t ') phase YSZ and thermal cycling behavior[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(3):350-359.
APA Yu, Chuntang,Liu, He,Jiang, Chengyang,Bao, Zebin,Zhu, Shenglong,&Wang, Fuhui.(2019).Modification of NiCoCrAlY with Pt: Part II. Application in TBC with pure metastable tetragonal (t ') phase YSZ and thermal cycling behavior.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(3),350-359.
MLA Yu, Chuntang,et al."Modification of NiCoCrAlY with Pt: Part II. Application in TBC with pure metastable tetragonal (t ') phase YSZ and thermal cycling behavior".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.3(2019):350-359.
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