Materials Transactions Online

Materials Transactions, Vol.45 No.01 (2004) pp.92-101
© 2004 The Japan Institute of Metals

Evaluation of Microfracture Mode in Ceramic Coating during Thermal Cycle Test using Laser AE Technique

Satoshi Nishinoiri1,, Manabu Enoki1 and Koichi Tomita2

1Department of Materials Engineering, The University of Tokyo, Tokyo 113-8656, Japan
2Industrial Technology Center of Fukui Prefecture, Fukui 910-0102, Japan

We have investigated the technique to detect acoustic emission (AE) signal using a laser interferometer, which can directly detect the surface velocity due to microcracking. Thermal cycle test for Al2O3/NiCrAlY/SUS304 coatings using an infrared image furnace was carried out in order to evaluate the failure process. Laser AE measurement system was improved to increase the sensitivity of AE monitoring for coatings. Microfracture mode during thermal cycle test was analyzed based on the measured AE behavior and a finite element method (FEM) simulation of wave propagation. From the result of waveform analysis, it was found that shear mode microfracture occurred toward the center from one of the edges of the specimen. This result agreed with the propagation direction of delamination determined from AE location results and the observation of the specimen after the thermal cycles were loaded.

(Received 2003/4/23; Accepted 2003/11/12)

Keywords: acoustic emission, laser interferometer, ceramic coating, finite element method, wave propagation

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REFERENCES

  1. R. A. Miller: J. Thermal Spray Technol. 6 (1997) 35-42.
  2. C. C. Berndt and R. A. Miller: Thin Solid Films 119 (1984) 173-184.
  3. G. M. Newaz and S. Q. Nusier: J. Eng. Mater. Technol. 120 (1998) 149-153.
  4. Y. Sawada: Jpn. J. NDI. 51 (2002) 392-396.
  5. K. Ogawa, T. Shoji, I. Abe and H. Hashimoto: Mater. Eval. 58 (2000) 476-781.
  6. D. Lescribaa and A. Vincent: Surf. Coat. Tech. 81 (1996) 297-306.
  7. J. F. Silva Gomes, J. M. Monteiro and M. A. P. Vaz: Mech. Mater. 32 (2000) 837-843.
  8. V. Teixeira, M. Andritschky, W. Fischer, H. P. Buchkremer and D. Stover: J. Mater. Process. Tech. 92-93 (1999) 209-216.
  9. J. Matejicek, S. Sampath, P. C. Brand and H. J. Prask: Acta. Marer. 47 (1999) 607-617.
  10. Chung-Kwei Lin, Christopher C. C. Berndt: Surf. Coat. Technol. 102 (1998) 1-7.
  11. X. Q. Ma, S. Cho and M. Takemoto: Surf. Coat. Technol. 139 (2001) 55-62.
  12. A. Kucuk, C. C. Berndt, U. Senturk and R. S. Lima: Mater. Sci. Eng. A. 284 (2000) 41-50.
  13. Mark E. Walter and B. Eigenmann: Mater. Sci. Eng. A. 282 (2000) 49-58.
  14. K. Ogawa, T. Shoji, H. Chiba, H. Abe and T. Torigoe: Jpn. J. NDI. 50 (2001) 164-169.
  15. L. Fu, K. A. Khor, H. W. Ng and T. N. Teo: Surf. Coat. Technol. 130 (2000) 233-239.
  16. A. Kawasaki, R. Watanabe: Eng. Fract. Mech. 69 (2002) 1723-1728.
  17. X. Q. Ma and M. Takemoto: Mater. Sci. Eng. A. 308 (2001) 101-110.
  18. Y. C. Zhou and T. Hashida: Int. J. Fatigue 24 (2002) 407-417.
  19. M. Enoki, M. Watanabe, P. Chivavibul and T. Kishi: Sci. Technol. Adv. Mater. 1 (2000) 157-165.
  20. M. Watanabe, M. Enoki and T. Kishi: Mater. Sci. Eng. A. 359 (2003) 368-374.
  21. M. Enoki and T. Kishi: Int. J. Fract. 38 (1988) 295-310.
  22. Y. Fukunaga, M. Enoki, T. Kishi and J. Kihara: J. Vibr. Acoust. 112 (1990) 45-52.
  23. J. W. Hutchinson: Acta Matall. 35 (1987) 1605-1619.
  24. A. N. Ceranoglu and Yih-Hsing Pao: J. Appl. Mech. 48 (1981) 125-147.
  25. M. Arai, T. Sakuma, U. Iwata and M. Saitoh: Jpn. J. Sci. Mater. Sci. 50 (2001) 651-656.
  26. Y. Itoh, M. Takahashi, Y. Ishiwata and K. Nagata: J. Soc. Mat. Sci., Japan 47 (1998) 665-671.

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