期刊
SURFACE & COATINGS TECHNOLOGY
卷 200, 期 16-17, 页码 5113-5118出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2005.05.033
关键词
thermal barrier coatings; thermal cyclic oxidation; electron beam physical vapor deposition; Lanthanum Cerium Oxide
Bulk material and coatings of Lanthanum-Cerium Oxide (La2Ce2O7) with a fluorite structure were studied as a candidate material for thermal barrier coating (TBC). It has been showed that such material has the properties of low thermal conductivity about four times lower than YSZ, the difference in the thermal expansion coefficient between La2Ce2O7 and bond coat is smaller than that of YSZ in TBC systems, high phase stability between room temperature and 1673 K, about 300 K higher than that of the YSZ. The coating prepared by electron beam physical vapor deposition (EB-PVD) showed that it has good thermal cycling behavior, implying that Such material can be a promising thermal barrier coating material. The deviation of coating composition from ingot can be overcome by the addition of excess La2O3 during ingot preparation and/or by adjusting the process parameters. (c) 2005 Elsevier B.V. All rights reserved.
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