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

Autor(en)

David Geist, Seiichiro Ii, Koichi Tsuchiya, Hans-Peter Karnthaler, Georgi Stefanov, Christian Rentenberger

Abstrakt

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(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

National Institute for Materials Science, Bulgarian Academy of Sciences (BAS)

Journal

Journal of Alloys and Compounds

Band

509

Seiten

1815-1818

Anzahl der Seiten

4

ISSN

0925-8388

DOI

https://doi.org/10.1016/j.jallcom.2010.10.050

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

103042 Elektronenmikroskopie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/64e6f933-2579-4547-9ecf-9531d8e77a9c