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The study on delamination life of TBC through burner-rig test

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Abstract

Since gas turbines operate under extremely high temperatures, the hot-section parts of gas turbines should be protected from severe environmental conditions. Thermal Barrier Coating (TBC) is a protection technique that lowers the surface temperature of the hot-section parts. To design reliable gas turbines, the delamination life of TBC should be accurately evaluated. This study evaluated the delamination life of TBC by conducting a burner-rig test simulation of thermal fatigue conditions using a hot flame. Two types of TBCs were considered: one with vertical cracks and the other without vertical cracks. To evaluate the effects of pre-isothermal deterioration on thermal fatigue life under flame conditions, burner-rig tests were performed using isothermally deteriorated specimens. The burner-rig tests were conducted until the coating layer was completely delaminated. Using the tests results, predictive equations for delamination life and delaminated TBC area were derived and analyzed.

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Abbreviations

N:

Number of cycle of burner-rig test

A:

Percentage of delaminated area of coating specimen

T:

Deterioration time at 1100°C

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Authors and Affiliations

  1. Graduate School of Mechanical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do, 16419, South Korea

    Junghan Yun, Jeong-Min Lee, Hyunwoo Song & Sunguk Wee

  2. Type Approval Team, Korea Railroad Research Institute, 176, Cheoldobangmulgwan-ro, Uiwang-si, Gyeonggi-do, 16105, South Korea

    Yongseok Kim

  3. School of Mechanical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do, 16419, South Korea

    Jae-Mean Koo, Young-Ze Lee & Chang-Sung Seok

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  1. Junghan Yun
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Correspondence to Chang-Sung Seok.

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Yun, J., Kim, Y., Lee, JM. et al. The study on delamination life of TBC through burner-rig test. Int. J. Precis. Eng. Manuf. 18, 555–560 (2017). https://doi.org/10.1007/s12541-017-0066-8

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  • DOI: https://doi.org/10.1007/s12541-017-0066-8

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