Coating Evaluation Using Ultrasonic Wave Technology

Abstract:

The capability of Rayleigh wave to be used as a tool for the evaluation of CVD DLC coating layer has been presented in this paper. One uncoated specimen and two CVD DLC coated specimen has been used. The dispersion curves of group velocity of leaky Rayleigh wave were measured. The dispersion curve of uncoated specimen shows that the group velocities were same at different frequencies, as there is no coating layer affecting the group velocities at different frequencies. There are distinct different between ‘sound’ specimen and ‘bad bonding’ specimen as the ‘bad bonding’ specimen show unevenness on its dispersion curve.

• Periodical: Advanced Materials Research (Volumes 105-106)
• Pages: 513-516
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.105-106.513
• Online since: April 2010
• Authors: Jun Jie Chang, Xing Guo Wang, Ying Chun Shan, Jiu Jun Xu
• Keywords: Damping Coefficient, Diamond-Like Carbon Coating, Phase Velocity, Rayleigh Wave

References

[1] C.M. Flannery, M.D. Whitefield and R.B. Jackman: IEEE Transactions on Ultrasonic, Ferroelectrics, and Frequency Control. Vol. 51(2004), p.368.

[2] F. Hiroshi: Ph.D. Thesis(Nagoya Institute of Technology，Nagoya，Japan，2001).

[3] T. Abe, T. Takagi, T. Uchimoto, et al.: Diamond and Related Materials. Vol. 13 (2004), p.819.

[4] J.L. Rose: Ultrasonic Waves in Solid Media (Cambridge University Press, London, England 1999).

[5] W. Sachse and Y.H. Pao: J. Appl. Phys. Vol. 49 (1978), p.4320.