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Interfaces In Quasicrystalline Systems

Published online by Cambridge University Press:  10 February 2011

R Divakar ,
D Sundararaman  and
S Ranganathan
R Divakar
Affiliation:
Physical Metallurgy Section, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India, divakar@igcar.ernet.in
D Sundararaman
Affiliation:
Physical Metallurgy Section, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India, divakar@igcar.ernet.in
S Ranganathan
Affiliation:
Centre for Advanced Study, Department of Metallurgy, Indian Institute of Science, Bangalore 560012, India.
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Abstract

Structural relations between quasicrystalline and related crystalline rational approximant phases have been of interest for some time now. Such relations are now being used to understand interface structures. Interfaces between structural motif - wise related, but dissimilarly periodic phases are expected to show a degree of lattice match in certain directions. Our earlier studies in the Al-Cu-Fe system using the HREM technique has shown this to be true. The structural difference leads to well defined structural ledges in the interface between the icosahedral Al-Cu-Fe phase and the monoclinic Al13Fe4 type phase. In the present paper we report our results on the HREM study of interfaces in Al-Cu-Fe and Al-Pd-Mn systems. The emphasis will be on heterophase interfaces between quasiperiodic and periodic phases, where the two are structurally related. An attempt will be made to correlate the results with calculated lattice projections of the two structures on the grain boundary plane.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 553: Symposium LL – Quasicrystals , 1998 , 209
Copyright
Copyright © Materials Research Society 1999

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References

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