Surface texture of substrates prepared by femtosecond laser for improving the thermal cycle life of TBCs

2021 ◽  
Author(s):  
Shuting Tang ◽  
Chao Wang ◽  
Chen Hua ◽  
Liang Yang ◽  
Yuru Wu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Surface Texture ◽  
Thermal Cycle ◽  
Cycle Life

The Influence of Surface Texture on Abrasive Wear

2019 ◽  
Vol 823 ◽  
pp. 33-40 ◽  
Author(s):  
Yu Tong Hu ◽  
Yong Yong He ◽  
Wei Wang
Keyword(s):  
Friction Coefficient ◽  
Femtosecond Laser ◽  
Abrasive Wear ◽  
White Light ◽  
Surface Texture ◽  
Friction Surface ◽  
Surface Texturing ◽  
Experimental Results ◽  
The Relationship ◽  
Main Factor

Friction happens everywhere. Abrasives generated in tribological process will result in secondary wear. Abrasive wear is a kind of rather common but harmful wear, which is the main reason for the damage of fifty-percent mechanical components by friction. Surface texturing is an effective method to improve the tribological and lubricating performance of tribo-pairs. In this paper, with different-size diamond particles added into the lubricant and a surface of the tribo-pairs textured by different parameters (diameter and depth) with femtosecond laser, the relationship between the surface texture and the abrasive wear was researched, and the influence of the texture on the abrasive wear was analyzed. The friction experiments were carried out on UMT3. The microstructures were tested and analyzed by SEM, microscope and White Light Interferometer respectively. The experimental results showed that the size of the surface texture, compared with that of abrasives, is the main factor which determines the friction coefficient. As the size of the surface texture is much bigger than that of the abrasives, the texture can accommodate the abrasives efficiently, and thus the friction coefficient is reduced efficiently.

scholarly journals Prediction of Thermal-Cycle Life for Plated Through Hole Based on Thermal-Stress Analysis.

1991 ◽  
Vol 6 (6) ◽  
pp. 306-314 ◽  
Author(s):  
Yoichi KITAMURA ◽  
Takashi TAKAHAMA ◽  
Susumu HOSHINOUCHI
Keyword(s):  
Thermal Stress ◽  
Stress Analysis ◽  
Thermal Cycle ◽  
Cycle Life ◽  
Thermal Stress Analysis ◽  
Plated Through Hole ◽  
Through Hole

Electro-thermal cycle life model for lithium iron phosphate battery

2012 ◽  
Vol 217 ◽  
pp. 509-518 ◽  
Author(s):  
Yonghuang Ye ◽  
Yixiang Shi ◽  
Andrew A.O. Tay
Keyword(s):  
Thermal Cycle ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
Cycle Life ◽  
Life Model

Thermal conductivity and thermal cycle life of La2O3 and HfO2 doped ZrO2–Y2O3 coatings produced by EB-PVD

2009 ◽  
Vol 203 (19) ◽  
pp. 2835-2840 ◽  
Author(s):  
Mineaki Matsumoto ◽  
Takeharu Kato ◽  
Norio Yamaguchi ◽  
Daisaku Yokoe ◽  
Hideaki Matsubara
Keyword(s):  
Thermal Conductivity ◽  
Thermal Cycle ◽  
Cycle Life

scholarly journals Investigation of microstructure changes in Al2O3-YSZ coatings and YSZ coatings and their effect on thermal cycle life

2021 ◽  
Author(s):  
Meiqi Dai ◽  
Xuemei Song ◽  
Chucheng Lin ◽  
Ziwei Liu ◽  
Wei Zheng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Cycle ◽  
Grain Orientation ◽  
Electron Backscatter Diffraction ◽  
Crack Size ◽  
Cycle Life ◽  
Atmospheric Plasma ◽  
Microstructure Changes ◽  
Coating Microstructure ◽  
Backscatter Diffraction

Abstract Yttria-stabilized zirconia (YSZ) coatings and Al2O3-YSZ coatings were prepared by atmospheric plasma spraying (APS). Their microstructural changes during thermal cycling were investigated via scanning electron microscopy (SEM) equipped with electron backscatter diffraction (EBSD) and X-ray diffraction (XRD). It was found that the microstructure and microstructure changes of the two coatings were different, including crystallinity, grain orientation, phase, and phase transition. These differences are closely related to the thermal cycle life of the coating. There is a relationship between crystallinity and crack size. Changes in grain orientation are related to microscopic strain and cracks. Phase transition is the direct cause of coating failure. In this study, the relationship between the changes in the coating microstructure and the thermal cycle life is discussed in detail. The failure mechanism of the coating was comprehensively analyzed from a microscopic perspective.

scholarly journals Phase Stability and Thermal Cycle Life of ZrO2-Y2O3-La2O3 Coatings Produced by EB-PYD

2005 ◽  
Vol 69 (1) ◽  
pp. 43-47 ◽  
Author(s):  
Mineaki Matsumoto ◽  
Norio Yamaguchi ◽  
Hideaki Matsubara
Keyword(s):  
Phase Stability ◽  
Thermal Cycle ◽  
Cycle Life
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