Mechanism of Transient Thermal Cycle Failure in ZrO_2 /NiCrAl Functionally Gradient Thermal Barrier Coatings

机译：ZrO_2 / NiCrAl功能梯度热障涂层的瞬态热循环破坏机理

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In this paper, the failure mechanism under transient thermal cyclernload is studied for a functionally gradient thermal barrier coatingsrn(FGTBC) system made of ZrO2 and NiCrAl plasma sprayed on arnsteel substrate. Controlled experiment and numerical analysisrn(thermoelastic finite element method (FEM)) are performed. Thernexperiment and numerical analysis results indicate that the surfacerntensile stress is determined to initiate surface cracks and tensilernstress normal to the interface is large enough to break therninterfacial bond (the magnitude of interfacial bond strength ofrnZrO2 layer in FGTBC is below the strength of the ZrO2, therninterface is weaker than the ZrO2 material). By comparisonrnbetween mode I stress intensity factor and the fracture toughness,rnthe surface cracks are considered to be arrested, this characteristicrnis confirmed by SEM micrograph. The interface cracks propagationrncauses the segment of ZrO2 layer in FGTBC to be spalled out.

机译：本文研究了一种由ZrO2和NiCrAl等离子喷涂在arnsteel基底上的功能梯度热障涂层（FGTBC）系统在瞬态热循环载荷下的失效机理。进行了控制实验和数值分析（热弹性有限元法（FEM））。实验和数值分析结果表明，确定了表面拉应力以引发表面裂纹，垂直于界面的拉应力足够大，足以破坏界面粘结（FGTBC中rnZrO2层的界面结合强度的大小低于ZrO2的强度，界面为比ZrO2材料更弱）。通过比较模式I的应力强度因子和断裂韧性，认为表面裂纹被阻止，该特征由SEM显微照片证实。界面裂纹的扩散导致FGTBC中ZrO2层的段被剥落。

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来源
《Asian Pacific conference for fracture and strength'99 (APCFS'99)》|1999年|p.1-4|共4页
会议地点 Xian(CN);Xian(CN)
作者
Fuchi Wang; Lu Wang; Guangshu Lu;
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Dept. Materials Science Engineering, Beijing Institute of Technology, Beijing 100081, China;

Dept. Materials Science Engineering, Beijing Institute of Technology, Beijing 100081, China;

Dept. Materials Science Engineering, Beijing Institute of Technology, Beijing 100081, China;

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专利

1. MECHANISM OF TRANSIENT THERMAL CYCLE FAILURE IN ZrO_2/NiCrAl FUNCTIONALLY GRADED THERMAL BARRIER COATINGS [J] . F. Wang, L.Wang, G. Liu Surface Engineering . 2001,第1期

机译：ZrO_2 / NiCrAl功能梯度热障涂层瞬态热循环失效机理
2. PARAMETRIC STUDIES OF FAILURE MECHANISMS IN THERMAL BARRIER COATINGS DURING THERMAL CYCLING USING FEM [J] . B. SRIVATHSA, D. K. DAS International Journal of Applied Mechanics and Engineering . 2015,第4期

机译：有限元分析方法在热循环过程中对热障涂层破坏机理的参数研究
3. Effects of gradient transitional layer on thermal cycling life and failure of LaZrCeO/YSZ thermal barrier coatings [J] . Shen Zaoyu, He Limin, Mu Rende, Corrosion science . 2020,第Feba期

机译：梯度过渡层对LaZrCeO / YSZ热障涂层热循环寿命和失效的影响
4. Damage mechanism of functionally graded thermal barrier coatings in thermal cycling [C] . M. Ohki, Y. Mutoh, M. Takahashi, International Thermal Spray Conference . 2002

机译：功能梯度热障涂层在热循环中的破坏机理
5. Thermal cycle parameter effects on the stress state, failure mechanisms and life prediction of thermal barrier coatings. [D] . Sridharan, Swetha. 2005

机译：热循环参数对热障涂层的应力状态，破坏机理和寿命预测有影响。
6. Durability of Gadolinium Zirconate/YSZ Double-Layered Thermal Barrier Coatings under Different Thermal Cyclic Test Conditions [O] . Satyapal Mahade, Nicholas Curry, Stefan Björklund, 2019

机译：锆con / YSZ双层热障涂层在不同热循环测试条件下的耐久性
7. Parametric Studies Of Failure Mechanisms In Thermal Barrier Coatings During Thermal Cycling Using FEM [O] . B. Srivathsa, D.K. Das 2015

机译：使用FEM热循环热障涂层失效机制的参数研究
8. Failure Mechanisms and Life Prediction of Thermal and Environmental Barrier Coatings under Thermal Gradients [R] . Zju, Dongming, Ghosn, Louis J., Miller, Robert A. 2008

机译：热梯度下热和环境屏障涂层的失效机理和寿命预测

Mechanism of Transient Thermal Cycle Failure in ZrO_2 /NiCrAl Functionally Gradient Thermal Barrier Coatings

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