中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Composition, structure evolution and cyclic oxidation behavior of La-2(Zr0.7Ce0.3)(2)O-7 EB-PVD TBCs

文献类型:期刊论文

作者Xu ZH ; He LM ; Zhao Y ; Mu RD ; He SM ; Cao XQ
刊名journal of alloys and compounds
出版日期2010
卷号491期号:1-2页码:729-736
关键词THERMAL BARRIER COATINGS RAY PHOTOELECTRON-SPECTROSCOPY THERMOPHYSICAL PROPERTIES CERAMICS OXIDES CERIA CONDUCTIVITY CATALYSTS YTTRIA ZIRCONATE
ISSN号0925-8388
通讯作者he lm
中文摘要lanthanum cerium zirconate (la-2(zr0.7ce0.3)(2)o-7, lz7c3) as a candidate material for thermal barrier coatings (tbcs) was prepared by electron beam-physical vapor deposition (eb-pvd). the composition, structure evolution, oxidation state,surface morphology and cyclic oxidation behavior of its coating were investigated. the results from x-ray diffraction (xrd) and raman spectra indicate that the partial decomposition of lz7c3 ingot occurs during deposition and several weak peaks of t-zro2, ce2o3 and ceo2 phases coexist in the as-deposited coating. two new phases of la2o3 and ce2zr2o7 simultaneously appear for those coatings after 1 cycle. however, ce2o3 disappears after 15 cycles. one weak raman band is detected for all cases at similar to 600 cm(-1), which is the characteristic of ce1-xzrxo2. from the x-ray photoelectron spectroscopy (xps) patterns, the coexistence of la3+, zr4+, ce4+ and ce3+ ions near the surface of lz7c3 coating appears before 5 cycles. meanwhile, the enrichment of la into zirconia and/or ceria lattices is attained with the increase of thermal cycles. the occurrence of compressive and tensile stresses, the opening up of gaps between those columnar clusters and the reduction-oxidation of cerium oxide are likely to be the primary factors for the occurrence of microcracks on the surface of lz7c3 coating during thermal cycling. (c) 2009 elsevier b.v. all rights reserved.
收录类别SCI收录期刊论文
语种英语
WOS记录号WOS:000274926300146
公开日期2012-06-07
源URL[http://ir.ciac.jl.cn/handle/322003/43886]  
专题长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式
GB/T 7714
Xu ZH,He LM,Zhao Y,et al. Composition, structure evolution and cyclic oxidation behavior of La-2(Zr0.7Ce0.3)(2)O-7 EB-PVD TBCs[J]. journal of alloys and compounds,2010,491(1-2):729-736.
APA Xu ZH,He LM,Zhao Y,Mu RD,He SM,&Cao XQ.(2010).Composition, structure evolution and cyclic oxidation behavior of La-2(Zr0.7Ce0.3)(2)O-7 EB-PVD TBCs.journal of alloys and compounds,491(1-2),729-736.
MLA Xu ZH,et al."Composition, structure evolution and cyclic oxidation behavior of La-2(Zr0.7Ce0.3)(2)O-7 EB-PVD TBCs".journal of alloys and compounds 491.1-2(2010):729-736.

入库方式: OAI收割

来源:长春应用化学研究所

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