Comparative study on failure behavior of promising CMAS-resistant plasma-sprayed thermal barrier coatings in burner rig test with/without CMAS deposition

Fang, Huanjie; Zhang, Chengcheng; Wang, Yongxin; Wang, Weize; Yang, Zining; Liu, Yangguang; Ye, Dongdong

doi:10.1016/j.ceramint.2022.12.099

Cited by 16 publications

(3 citation statements)

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“…The thermal cycle life of YbYSZ coating is ± 3 times compared with 12 times of YSZ coating, and the lifetime of the YbYSZ coatin improved by about 83%. According to a previous study [7], under the same coupling c ditions, the thermal cycle life of DCL-YbYSZ is increased by 33% and 120%, respectiv compared with that of DCL-YSZ and conventional YSZ. By comparing DCL-YbYSZ a DCL-YSZ by a single variable method, it can be found that the doping of Yb improves ability of the coating to resist the coupling condition of CMAS-thermal shock.…”

Section: Life Comparison Under Thermal Cycling-cmas Coupling Conditionmentioning

confidence: 85%

“…The specific parameters of spraying are shown in Table 1. In previous studies [7], only the effect of coating resistance to CMAS corrosion was considered without thermal shock. The parameters in Table 1 are determined through continuous trial and error and combined with the properties of the material itself, such as melting point, to comprehensively improve the corrosion resistance of CMAS and thermal shock resistance.…”

Section: Coating Preparationmentioning

confidence: 99%

“…(3) When CMAS penetrated into the ceramic layer and reached the surface of the Thermally Growth Oxide (TGO) layer, chemical reactions occurred with the coating, which accelerated the peeling failure of the coating on TGO. With global environmental deterioration, such as volcanic eruptions and dust storms, CMAS corrosion has been recognized as a serious concern of the global public [7].…”

Section: Introductionmentioning

confidence: 99%

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Damage Grading Evaluation of Thermal Barrier Coatings under CMAS Corrosion

Liu,

Wang

et al. 2023

Coatings

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Thermal barrier coatings (TBCs) material has excellent high-temperature resistance and heat insulation performance, which plays a vital role in improving the working efficiency and running life of the engine. During the flight, the engine will inhale dust particles in the air. These particles are mostly from siliceous debris, which are usually called calcium magnesium aluminum silicate (CMAS). At present, CMAS corrosion has become one of the important problems affecting the service life of thermal barrier coatings. In this study, conventional yttrium oxide stabilized zirconia (YSZ) coatings and ytterbium oxide and yttrium oxide co-stabilized zirconia (YbYSZ) coatings were prepared by atmospheric plasma spraying. The two coatings were examined under thermal cycling-CMAS coupling conditions and divided into six life stages. The failure modes, CMAS permeation behavior, crack characteristics and mechanical properties of the two coatings at different life stages were evaluated systematically. The experimental results show that the YbYSZ coating has a longer life than YSZ coating under the thermal cycling and CMAS coupling condition, which increases by about 83% compared with the conventional YSZ coating. In the whole life stage, the porosity of YbYSZ coating is always higher than that of YSZ coating. The phase transition is not the reason for the failure and spalling of the coatings. The crack length of the two coatings showed an increasing trend, but the crack length of the YSZ coating was higher than that of the YbYSZ coating, and the crack density of the two coatings showed a “saddle shape”, which was more obvious for the YSZ coating. The YbYSZ coating shows better mechanical properties under the thermal cycling-CMAS coupling condition with the evolution of life.

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Section: Life Comparison Under Thermal Cycling-cmas Coupling Conditionmentioning

confidence: 85%

Section: Coating Preparationmentioning

confidence: 99%