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Laser surface modification of metal-coated ceramics

Published online by Cambridge University Press:  31 January 2011

R. K. Singh ,
K. Jagannadham  and
J. Narayan
R. K. Singh
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7916
K. Jagannadham
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7916
J. Narayan
Affiliation:
Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7916
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Abstract

Pulsed excimer laser radiation has been successfully employed in the improvement (> 50%) of fracture strength of metal-coated ceramics. Thin metallic layers (∼500 Å) of nickel were deposited on silicon nitride and silicon carbide substrates and further irradiated with pulsed excimer (xenon chloride, krypton fluoride) laser pulses. The laser energy density was varied from 0.4 to 2.0 J cm −2 to optimize the formation of mixed interfacial layers. The formation of interfacial layers was studied by transmission electron microscopy and Rutherford backscattering spectrometry techniques. Detailed heat flow calculations using implicit finite difference methods were performed to simulate the effects of intense laser irradiation on metal-coated ceramic structures. Three different mechanisms were found to play an important role in the improvement in the fracture strength of these ceramics. Theoretical calculations showed that the displacement of the crack tip away from the free surface by laser surface modification can lead to a 100% improvement in the fracture strength of the ceramic.

Type
Articles
Information
Journal of Materials Research , Volume 3 , Issue 6 , December 1988 , pp. 1119 - 1126
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

1Narayan, J., Fathy, D., Holland, O. W., Appleton, B. R., Davis, R. F., and Becher, P. F., J. Appl. Phys. 56, 1577 (1984).CrossRefGoogle Scholar
2Narayan, J., Fathy, D., Holland, O. W., and Appleton, B. R., Mater. Lett. 3, 261 (1985).CrossRefGoogle Scholar
3More, K. L., Davis, R. F., Appleton, B. R., Lowdnes, D., and Smith, P., Mater. Res. Soc. Proc. 51, 445 (1985).CrossRefGoogle Scholar
4Singh, R. K., Biunno, N., and Narayan, J., Mater. Res. Soc. Proc. 100, 653 (1987).CrossRefGoogle Scholar
5Narayan, J. and Shukla, V. N.J. Appl. Phys. 51, 3444 (1980).CrossRefGoogle Scholar
6Carniglia, S. C., J. Am. Ceram. Soc. 55, 243 (1972).CrossRefGoogle Scholar
7Narayan, J. and Appleton, B. R., Mater. Res. Soc. Proc. 60, 313 (1986).CrossRefGoogle Scholar
8Wood, R. F. and Giles, G. E., Phys. Rev. B 23, 2923 (1982).Google Scholar
9Baeri, P., Campisano, S., Foti, G., and Rimini, E., J. Appl. Phys. 50, 788 (1979).CrossRefGoogle Scholar
10Singh, R. K. and Narayan, J., Mater. Sci. Eng. B (in press).Google Scholar
11Thermophysical Properties of Matter, edited by Toulakian, Y. S., Powell, R. W., Ho, C. Y., and Klemens, P. G. (IFI Plenum, New York, 1970).Google Scholar
12Charschan, S. S., Lasers in Industry (Van Nostrand Reinhold, New York, 1972).Google Scholar
13Jagannadham, K. and Narayan, J., J. Mater. Res. (submitted for publication).Google Scholar
14Jagannadham, K. and Narayan, J., J. Am. Ceram. Soc. (in press)Google Scholar
15Rice, J. R., in Fracture, An Advanced Treatise, edited by Leibonitz, H. (Academic, New York, 1968), Vol. 2.Google Scholar
16Green, D. J., J. Mater. Sci. 19, 2165 (1985).CrossRefGoogle Scholar