Nanocrystalline Zr3Al made through amorphization by repeated cold rolling and followed by crystallization

Author(s)
David Geist, Seiichiro Ii, Koichi Tsuchiya, Hans-Peter Karnthaler, Georgi Stefanov, Christian Rentenberger
Abstract

The intermetallic compound Zr3Al is severely deformed by the method of repeated cold rolling. By X-ray diffraction it is shown that this leads to amorphization. TEM investigations reveal that a homogeneously distributed debris of very small nanocrystals is present in the amorphous matrix that is not resolved by X-ray diffraction. After heating to 773 K, the crystallization of the amorphous structure leads to a fully nanocrystalline structure of small grains (10-20 nm in diameter) of the non-equilibrium Zr 2Al phase. It is concluded that the debris retained in the amorphous phase acts as nuclei. After heating to 973 K the grains grow to about 100 nm in diameter and the compound Zr3Al starts to form, that is corresponding to the alloy composition.

Organisation(s)
Physics of Nanostructured Materials
External organisation(s)
Research and Services Division of Materials Data and Integrated System, Bulgarian Academy of Sciences (BAS)
Journal
Journal of Alloys and Compounds
Volume
509
Pages
1815-1818
No. of pages
4
ISSN
0925-8388
DOI
https://doi.org/10.1016/j.jallcom.2010.10.050
Publication date
2011
Peer reviewed
Yes
Austrian Fields of Science 2012
103042 Electron microscopy, 103018 Materials physics
Portal url
https://ucrisportal.univie.ac.at/en/publications/nanocrystalline-zr3al-made-through-amorphization-by-repeated-cold-rolling-and-followed-by-crystallization(64e6f933-2579-4547-9ecf-9531d8e77a9c).html