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Pulsed Laser Mixing of Metal Overlayers on Ceramics

Published online by Cambridge University Press:  26 February 2011

R. K. Singh ,
N. Biunno  and
J. Narayan
R. K. Singh
Affiliation:
Department of Materials Science and EngineeringNorth Carolina State UniversityRaleigh, N.C.27695–7916
N. Biunno
Affiliation:
Department of Materials Science and EngineeringNorth Carolina State UniversityRaleigh, N.C.27695–7916
J. Narayan
Affiliation:
Department of Materials Science and EngineeringNorth Carolina State UniversityRaleigh, N.C.27695–7916
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Abstract

Pulsed laser mixing has been used as surface modification technique for the improvement in the mechanical properties of ceramics. Thin metallic layers of nickel were deposited on structural silicon nitride and were irradiated with Xenon Chloride (XeCl) laser pulses. The laser parameters were optimized to lead to the formation of mixed layers. The mixed interfacial layers were analyzed using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Rutherford Backscattering (RBS) techniques. Detailed heat flow calculations were performed to simulate the effects of intense laser irradiation on metal coated ceramic structures. The melt lifetimes and the interfacial temperatures obtained using these calculations, were applied to understand the laser mixing phenomena occuring in these layered structures. Thermodynamics of chemical reactions between the metal overlayers and the substrate were done to predict the formation of mixed interfacial layers during laser irradiation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 100: Symposium – A Fundamentals of Beam-Solid Interactions and Transient Thermal Processing , 1988 , 653
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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