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High temperature stabilization of nanocrystalline grain size: Thermodynamic versus kinetic strategies

Published online by Cambridge University Press:  23 January 2013

Carl C. Koch ,
Ronald O. Scattergood ,
Mostafa Saber  and
Hasan Kotan
Carl C. Koch*
Affiliation:
Materials Science and Engineering Department, North Carolina State University, Raleigh, North Carolina 27695
Ronald O. Scattergood
Affiliation:
Materials Science and Engineering Department, North Carolina State University, Raleigh, North Carolina 27695
Mostafa Saber
Affiliation:
Materials Science and Engineering Department, North Carolina State University, Raleigh, North Carolina 27695
Hasan Kotan
Affiliation:
Materials Science and Engineering Department, North Carolina State University, Raleigh, North Carolina 27695
*
a)Address all correspondence to this author. e-mail: carl_koch@ncsu.edu
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Abstract

Data from the literature and our laboratory have been reviewed regarding the maximum homologous temperatures that can be attained by the addition of solute elements that may induce thermodynamic or kinetic (Zener pinning) stabilization of a nanocrystalline grain size (<100 nm) to elevated temperatures. The results of this review suggest that kinetic stabilization by Zener pinning by nanoscale second phases may be the more effective strategy for keeping a nanoscale grain microstructure at the highest homologous temperatures. More research is necessary to confirm this suggestion and to determine the influence of nanoscale grain boundary second phases on the mechanical behavior of the nanocrystalline matrix.

Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 13: FOCUS ISSUE: Frontiers in Thin-Film Epitaxy and Nanostructured Materials , 14 July 2013 , pp. 1785 - 1791
Copyright
Copyright © Materials Research Society 2013 

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