Thermal cycling behavior of La2Ce2O7/8YSZ double-ceramic-layer thermal barrier coatings prepared by atmospheric plasma spraying

✍ Scribed by Wen Ma; Hongying Dong; Hongbo Guo; Shengkai Gong; Xuebin Zheng

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 577 KB
• Volume: 204
• Category: Article
• ISSN: 0257-8972
• DOI: 10.1016/j.surfcoat.2010.03.053

✦ Synopsis

The La 2 Ce 2 O 7 /8YSZ double-ceramic-layer thermal barrier coatings (TBCs) system, which is prepared by atmospheric plasma spraying (APS), is found to have a much longer lifetime compared with the single layer La 2 Ce 2 O 7 system under the burner rig test. The double-ceramic-layer coating structure design can effectively alleviate the thermal expansion mismatch between the La 2 Ce 2 O 7 coating and the bondcoat. The failure mechanism of the La 2 Ce 2 O 7 /8YSZ double-ceramic-layer coating is mainly due to the sintering of the La 2 Ce 2 O 7 coating surface during thermal cycling.