# 세라믹코팅재의 잔류응력 해석

• Han, Ji-Won (Department of Mechanical Engineering, Hoseo university)
• 한지원 (호서대학교 공과대학 기계공학과)
• Published : 2008.06.30

#### Abstract

In the present work, the measurement method of residual stresses in thermal barrier coatings(TBCs) which are received the thermal shock is performed numerically. For this, the internal residual stresses are predicted by commercial FEM software ABAQUS because the hole drilling strain gage method measures residual stresses only near the surface of a material. As the results of this study, the residual stresses are linearly increased when the surface temperatures are over $1,200^{\circ}C$. It is also found that the values of residual stress are increased as the coating thickness is thin.

#### References

1. K. kokini, B. D. Choules, T. A. Tayor, 'Thermal Fracture of Thermal Barrier Coatings in a High Heat Flux Environment', Surface and Coatings Technology, Vol. 106, pp. 23-29, 1998 https://doi.org/10.1016/S0257-8972(98)00485-X
2. A. Kucuk, C. C. Bermdt, 'Influence of Plasma Sprayed Parameter on Mechanical Properties of Yttia Stabilized Zirconia Coatings', Material Science and Engineering, Vol. A2, pp. 29-40, 2000
3. M. F. J. Koolloos, J. M. Houben, 'Behavior of Plasma- Sprayed Thermal Barrier Coatings During Thermal Cycling and The Effect of a Preoxidizied NiCrAlY Bond Coat', Journal of Thermal Spray Technology, Vol. 9, pp. 48-58, 2000
4. P. K. Wright, A. G. Evans, 'Mechanics Governing The Performance of Thermal Barrier Coatings', Current Opinion in Solid State and Materials Science, Vol. 4, pp. 255-265, 1999 https://doi.org/10.1016/S1359-0286(99)00024-8
5. H.W.Na, Z.Gan, 'Finite Element Analysis Technique or Predicting as Sprayed Residual Stresses Generated by The Plasma Spay Coating Process', Finite Elements in Analysis and Design, Vol. 41, pp. 1235-1254, 2005 https://doi.org/10.1016/j.finel.2005.02.002
6. F. A. Kandil, J. D. Lord, A. T. Fry, P. V. Granti, 'A Review of Residual Stress Measurement Methods-a Guide to Technique Selection', NPL Materials Centre, NPL Report MATC(A)04, 2001
7. 'Standard Test Method for Determinig Residual Stresses by The Hole-Drilling Strain-Gage Method', ASTM E837-01, pp. 681-690, 2001