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Laser-Induced Reactive Evaporation and Condensation

Published online by Cambridge University Press:  25 February 2011

Gan-Moog Chow  and
Peter R. Struti
Gan-Moog Chow
Affiliation:
Institute of Materials Science, Box U-136, the University of Connecticut, Storrs, CT 06269
Peter R. Struti
Affiliation:
Institute of Materials Science, Box U-136, the University of Connecticut, Storrs, CT 06269
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Abstract

A study of laser-induced reactive evaporation-condensation is presented. This considers coevaporation of metallic, and non-metallic species, by a cw carbon dioxide laser beam, within a reducing environment (98.5% hydrogen, 1.5% methane). A heated W filament placed in proximity of the laser beam-substrate interaction zone produces W for deposition via chemical vapor transport reactions. Composite thin films of a W matrix containing amorphous silica fibers have been deposited on nickel alloy substrates. These films form at rates of about 1 micron/sec, and are found to be adherent to the substrates. The diameter of the fibers is between 25 nm and 120 nm, depending on the interaction time. Various analytical techniques have been employed to characterize as-synthesized layers. Mechanisms of this process are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 129: Symposium B – Laser and Particle-Beam Modification of Chemical Processes on Surfaces , 1988 , 393
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

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