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Morphological Stability of Ni(Al)/Ni3Al Nanolaminate Composites

Published online by Cambridge University Press:  21 February 2011

Jason P. Fain ,
Rajarshi Banerjee ,
Daniel Josell ,
Peter M. Anderson ,
Hamish Fraser ,
Natalia Tymiak  and
William Gerberich
Jason P. Fain
Affiliation:
Dept. MSE, The Ohio State University, 2041 College Rd., Columbus, H 43210-1179
Rajarshi Banerjee
Affiliation:
Dept. MSE, The Ohio State University, 2041 College Rd., Columbus, H 43210-1179
Daniel Josell
Affiliation:
Materials B 164 NIST 100 Bureau Dr, Stop 8554 Gaithersburg, MD 20899-8554.
Peter M. Anderson
Affiliation:
Dept. MSE, The Ohio State University, 2041 College Rd., Columbus, H 43210-1179, [email protected].
Hamish Fraser
Affiliation:
Dept. MSE, The Ohio State University, 2041 College Rd., Columbus, H 43210-1179
Natalia Tymiak
Affiliation:
Dept. of Chemical Eng. and Materials Science, University of Minnesota, Minneapolis. MN.
William Gerberich
Affiliation:
Dept. MSE, The Ohio State University, 2041 College Rd., Columbus, H 43210-1179
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Abstract

This manuscript discusses the morphological instability observed when multilayered samples with alternating layers of Γ-Ni(Al)/γ-Ni3Al are exposed to 800C for approximately 100 hours. Samples with 20nm/20nm or 120nm/120nm layer thickness and <001> or <Ill> crystal orientation to the interface normal were tested. Pinching off of layers is strongly affected by crystal orientation and layer thickness. Corresponding modeling suggests that the stability of this system is sensitive to fluctuations in the volume fraction of the two phases, the aspect ratio of columnar grains in the layers, and whether coherent or semi-coherent interfaces are present.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 581: Symposium F – Nanophase & Nanocomposite Materials II , 1999 , 603
Copyright
Copyright © Materials Research Society 2000

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References

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