Journal Article

PreJuSER-57124

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Thermal stability of lanthanum zirconate plasma-sprayed coating

Cao, X. Q.FZJ* ; Vaßen, R.FZJ* ; Jungen, W.FZJ* ; Schwartz, S. ; Tietz, F.FZJ* ; Stöver, D.FZJ*

2001
Wiley-Blackwell Oxford [u.a.]

This record in other databases:

Abstract: 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.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IWV-1)

Research Program(s):

1. Werkstoff- und Bauteilentwicklung für fortschrittliche Kraftwerke (11.30.0)

Appears in the scientific report 2002

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