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A study on the mechanism of amorphous phase formation by interdiffusion in Ni/Zr multilayers

Published online by Cambridge University Press:  03 March 2011

Sang-Gweon Chang ,
Jai-Young Lee ,
Geun-Hong Kim  and
Chang-Hwan Chun
Sang-Gweon Chang
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Gusong Dong 373-1, Yusong Gu, Taejon, Korea
Jai-Young Lee
Affiliation:
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Gusong Dong 373-1, Yusong Gu, Taejon, Korea
Geun-Hong Kim
Affiliation:
Advanced Technology Research Center, Agency for Defense Development, P.O. Box 35, Taejon, Korea
Chang-Hwan Chun
Affiliation:
Advanced Technology Research Center, Agency for Defense Development, P.O. Box 35, Taejon, Korea
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Abstract

The mechanism of the solid-state amorphization has been investigated by means of the microstructural studies on the evolution of Ni/Zr diffusion couples, prepared at different sputtering pressures, during short heating times at high temperature. In the sample deposited at 8 mTorr compared to that at 3 mTorr, the possibility of the supersaturation sequence prior to amorphization is observed, and the amorphous phase grows extremely fast with diffuse interface. A high-resolution TEM image shows that the amorphous phase preferentially penetrates along the Zr grain boundary into the Zr layer and selectively grows from the grain boundary into the region of Zr grain with many defects. From the results, the importance of interstitial diffusion has been discussed, and a modified mechanism has been suggested.

Type
Articles
Information
Journal of Materials Research , Volume 10 , Issue 6 , June 1995 , pp. 1555 - 1560
Copyright
Copyright © Materials Research Society 1995

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References

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