Thermo-Physical Properties and Thermal Shock Resistance of Segmented La2Ce2O7/YSZ Thermal Barrier Coatings

2009 ◽  
Vol 18 (4) ◽  
pp. 665-671 ◽  
Author(s):  
Hongbo Guo ◽  
Yi Wang ◽  
Lu Wang ◽  
Shengkai Gong
Keyword(s):  
Physical Properties ◽  
Thermal Shock ◽  
Thermal Barrier Coatings ◽  
Thermal Shock Resistance ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Shock Resistance ◽  
Thermo Physical Properties

Thermal Shock Resistance of APS 8YSZ Thermal Barrier Coatings on Titanium Alloy

2011 ◽  
Vol 21 (2) ◽  
pp. 335-343 ◽  
Author(s):  
Shuibing Zeng ◽  
Yangjia Liu ◽  
Xizhi Fan ◽  
Wenzhi Huang ◽  
Lijian Gu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Thermal Shock ◽  
Thermal Barrier Coatings ◽  
Thermal Shock Resistance ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Shock Resistance

Effect of Pre-Oxidation Treatment on the Thermal Shock Resistance of Thermal Barrier Coatings in a Combustion Gas Environment

2010 ◽  
Vol 654-656 ◽  
pp. 1924-1927 ◽  
Author(s):  
Hui Mei ◽  
Lai Fei Cheng ◽  
Ya Nan Liu ◽  
Li Tong Zhang
Keyword(s):  
Thermal Shock ◽  
Thermal Barrier Coatings ◽  
Thermal Shock Resistance ◽  
High Speed ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Oxidation Treatment ◽  
Barrier Coatings ◽  
Combustion Gas ◽  
Shock Resistance

Thermal barrier coatings (TBCs) were deposited by an Air Plasma Spraying (APS) technique. The TBC coating comprised of 92 wt.% ZrO2 and 8 wt.% Y2O3 (YSZ), CoNiCrAlY bond coat, and MarM247 nickel base super alloy. After APS of YSZ two batches of TBC specimens were tested, one batch of which was pre-oxidised in air for 10h at 1080 oC. Both types of the specimens were directly pushed into a combustion gas at 1150 oC for 25 min and then out to the natural air for quenching. The combustion gas was produced by burning jet fuel with high speed air in a high temperature wind tunnel, which simulates the real service conditions in an aeroengine. Results show that TBCs prepared by the APS had good thermal shock resistance in the combustion gas. The pre-oxidation treatment of the TBC had a significant effect on its thermal shock life. The as-oxidised TBCs always had worse thermal shock resistance than the as-sprayed ones after thermal shock cycles.

Improving Thermal Shock Resistance of Plasma-Sprayed Yttria-Stabilized Zirconia Thermal Barrier Coatings by Laser Remelting

2012 ◽  
Vol 472-475 ◽  
pp. 2502-2507
Author(s):  
Zong Yin Duan ◽  
Dong Sheng Wang
Keyword(s):  
Thermal Shock ◽  
Thermal Barrier Coatings ◽  
Thermal Shock Resistance ◽  
Yttria Stabilized Zirconia ◽  
Thermal Barrier ◽  
Laser Remelting ◽  
Stabilized Zirconia ◽  
Barrier Coatings ◽  
Shock Resistance ◽  
Plasma Sprayed

This paper deals with the microstructure and thermal shock behavior of laser remelting of yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) deposited by plasma spraying. The microstructures of the coatings were analyzed by scanning electron microscopy (SEM). It was found that the as-sprayed ceramic coating had laminated structure with high porosity. However, the coating exhibited a dense lamellar-like layer with segment cracks on the remained plasma-sprayed porous layer. Thermal shock experiments for the two kinds of TBCs were performed by water quenching method. Testing result showed that the laser-remelted TBC had better thermal shock resistance than the as-sprayed one. The damage mode of the as-sprayed TBC was great-size whole spalling. In contract, the failure mechanism of the laser-remelted one was mainly local pelling. Segmented cracks of the top ceramic coatings caused by laser remelting improved the stress accommodation and were mainly attributed to the enhancement for thermal shock life of TBC.

Thermal shock resistance of double-layer thermal barrier coatings

2020 ◽  
Vol 35 (20) ◽  
pp. 2808-2816
Author(s):  
Yang Feng ◽  
Tian-shun Dong ◽  
Bin-guo Fu ◽  
Guo-lu Li ◽  
Qi Liu ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Barrier Coatings ◽  
Double Layer ◽  
Thermal Shock Resistance ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Shock Resistance

Abstract

Microstructure and thermal shock resistance of AlBOw- and BNw-whisker-modified thermal barrier coatings

2020 ◽  
Vol 46 (10) ◽  
pp. 16372-16379
Author(s):  
Wang Changliang ◽  
Tian Haoliang ◽  
Guo Mengqiu ◽  
Gao Junguo ◽  
Cui Yongjing ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Barrier Coatings ◽  
Thermal Shock Resistance ◽  
Thermal Barrier ◽  
Barrier Coatings ◽  
Shock Resistance
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