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Measurement of Interface Strength by Laser Pulse induced Spallation

Published online by Cambridge University Press:  16 February 2011

V. Gupta  and
A. S. Argon
V. Gupta
Affiliation:
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139.
A. S. Argon
Affiliation:
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139.
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Abstract

The strength of planar interfaces between a substrate and a thin coating (1–2 µm) can be measured quite effectively by a laser spallation technique. In this technique a laser pulse of a high energy and a predetermined length is converted into a pressure pulse of a critical amplitude and width that is sent through the substrate toward the free surface with the coating. The compressive pressure pulse is reflected into a tension pulse from the free surface of the coating and loads the coating/substrate interface in tension. The laser flux is tuned to a threshold level at which the interface comes apart. The critical stress amplitude that accomplishes the removal of the coating is determined from a computer simulation process. The simulation itself is verified by means of a piezoelectric crystal probe which is capable of mapping out the profile of the stress pulse generated by the laser pulse.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 188: Symposium K – Thin Films: Stresses and Mechanical Properties II , 1990 , 245
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

1. Anh, J., Mittal, K. L., and MacQueen, R. H., ASTM STP 640, Edited by Mittal, K. L., pp.134–157 (1978).Google Scholar
2. Chiang, S. D., Marshall, D. B., and Evans, A. G., in Surfaces and Interfaces in Ceramic and Ceramic-Metal Systems, Materials Science Research, Vol.14, edited by Pask, J. and Evans, A. G., Plenum Press, New York, 1981, pp. 603–617.Google Scholar
3. Gupta, V., Ph.D. Thesis, Department of Mechanical Engineering, M.I.T., Cambridge, Massachusetts (1990).Google Scholar
4. Clifton, R. J., J. Appl. Phys., 41, pp. 5335–5337 (1978).Google Scholar
5. Argon, A. S., Gupta, V., Landis, H. S., and Comie, J. A., J. Mater. Sci., 24, pp. 1207–1218 (1989).Google Scholar
6. Gupta, V., Argon, A. S., and Cornie, J. A., J. Mater. Sci., 24, pp. 2031–2040 (1989).Google Scholar