An elevated-temperature depth-sensing instrumented indentation apparatus for investigating thermo-mechanical behaviour of thermal barrier coatings

2017 ◽  
Vol 88 (4) ◽  
pp. 045102 ◽  
Author(s):  
Zhaoliang Qu ◽  
Miao Yu ◽  
Yanchao Liu ◽  
Baosheng Xu ◽  
Rujie He ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Thermal Barrier Coatings ◽  
Mechanical Behaviour ◽  
Thermal Barrier ◽  
Instrumented Indentation ◽  
Depth Sensing ◽  
Barrier Coatings ◽  
Temperature Depth

scholarly journals Depth-Sensing Indentation Creep Behavior of Nanostructured Thermal Barrier Coatings from As-Synthesized t’-8YSZ Feedstocks

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 38
Author(s):  
Feifei Zhou ◽  
Min Liu ◽  
Yaming Wang ◽  
You Wang ◽  
Chunming Deng
Keyword(s):  
Strain Rate ◽  
Thermal Barrier Coatings ◽  
Strain Rate Sensitivity ◽  
Creep Behavior ◽  
Rate Sensitivity ◽  
Indentation Creep ◽  
Thermal Barrier ◽  
Depth Sensing ◽  
Barrier Coatings ◽  
Nano Indentation

Nano-indentation is a popular method to characterize the micromechanical properties of nanostructured 8YSZ coatings. However, little research has focused on the creep behavior of nano-indentation and only the elastic modulus and nanohardness have been analyzed. Herein, for the first time, the nano-indentation creep behavior of plasma-sprayed nanostructured 8YSZ coatings using as-prepared nanostructured non-transformable tetragonal (t’) feedstocks was investigated. The indentation creep behavior can be well characterized by the power-law equation and the strain rate sensitivity has been calculated in light of the equation. The strain rate sensitivity was sensitive to the load and the reasons were analyzed in detail. The current results can further guide and design thermal barrier coatings from the point of indentation creep property.

GS0408 Measurement of Young's Modulus of Thermal Barrier Coatings at Elevated Temperature

2016 ◽  
Vol 2016.22 (0) ◽  
pp. _GS0408-1_-_GS0408-2_
Author(s):  
Kazuki OOKUBO ◽  
Minako YOKOTA ◽  
Satoru TAKAHASHI ◽  
Hiroyuki WAKI ◽  
Masahiko KATO ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Young’S Modulus ◽  
Thermal Barrier Coatings ◽  
Young's Modulus ◽  
Thermal Barrier ◽  
Barrier Coatings

Investigation of Pile-Up Behavior for Thermal Barrier Coatings Under Elevated-Temperature Indentation

2016 ◽  
Vol 83 (4) ◽  
Author(s):  
Zhaoliang Qu ◽  
Yongmao Pei ◽  
Rujie He ◽  
Daining Fang
Keyword(s):  
Elevated Temperature ◽  
Young’S Modulus ◽  
Thermal Barrier Coatings ◽  
Young's Modulus ◽  
Major Influence ◽  
Thermal Barrier ◽  
Temperature Dependent ◽  
Barrier Coatings ◽  
Pile Up ◽  
Dependent Factor

The elevated-temperature indentation has been utilized to measure the elevated-temperature mechanical properties of thermal barrier coatings (TBCs), which have a major influence on their thermomechanical characteristics and failures. In this paper, the pile-up phenomenon of TBCs under elevated-temperature indentation was investigated, and a characterization method for Young's modulus of TBCs was proposed. According to the dimensional analysis and finite-element method, a critical temperature-dependent factor was conducted as the criterion for pile-up behavior. Some experiment results agreed fairly well with the criterion. Then, the pile-up behavior of TBCs at elevated temperature was studied. It was found that the pile-up behavior depended on the temperature-dependent factor and got larger with increasing temperature. Finally, a characterization method was proposed to extract the Young's modulus of TBCs, which was found to be more suitable for elevated-temperature indentation.

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