%0 Journal Article
%A Cao, X. Q.
%A Vaßen, R.
%A Jungen, W.
%A Schwartz, S.
%A Tietz, F.
%A Stöver, D.
%T Thermal stability of lanthanum zirconate plasma-sprayed coating
%J Journal of the American Ceramic Society
%V 84
%@ 0002-7820
%C Oxford [u.a.]
%I Wiley-Blackwell
%M PreJuSER-57124
%P 2086 - 2090
%D 2001
%Z Record converted from VDB: 12.11.2012
%X Lanthanum zirconate (La2Zr2O7, LZ) is a newly proposed material for thermal barrier coatings (TBCs). The thermal stability of LZ coating was studied in this work by long-term annealing and thermal cycling. After long-term annealing at 1400 degreesC or thermal cycling, both LZ powder and plasma-sprayed coating still kept the pyrochlore structure, and a preferred crystal growth direction in the coating was observed by X-ray diffraction. A considerable amount of La2O3 in the powder was evaporated in the plasma flame, resulting in a nonstoichiometric coating. Additionally, compared with the standard TBC material yttria-stabilized zirconia (YSZ), LZ coating has a lower thermal expansion coefficient, which leads to higher stress levels in a TBC system.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000170962600026
%U https://juser.fz-juelich.de/record/57124