Effect of Mo addition on the formation of metastable fcc Zr2Ni and icosahedral phases in Zr-Al-Ni-Cu glassy alloy

Authors
Citation
J. Saida et A. Inoue, Effect of Mo addition on the formation of metastable fcc Zr2Ni and icosahedral phases in Zr-Al-Ni-Cu glassy alloy, JPN J A P 2, 40(7B), 2001, pp. L769-L772
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
40
Issue
7B
Year of publication
2001
Pages
L769 - L772
Database
ISI
SICI code
0021-4922(20010715)40:7B<L769:EOMAOT>2.0.ZU;2-X
Abstract
We investigated the transformation behavior at the initial crystallization stage in the Zr-Al-Ni-Cu-Mo glassy alloy. In the Zr65Al7.5Ni10Cu12.5Mo5 all oy, the crystallization reaction changes to two reactions and the first rea ction corresponds to the nanoscale fee Zr2Ni phase formation. The two-stage crystallization reaction is also observed in the Zr65Al7.5Ni5Cu17.5Mo5 all oy, where the primary phase is the nanoscale icosahedral quasicrystalline p hase. The difference in the primary phase between the two alloys is attribu ted to the difference in the chemical affinities of Mo with Cu and Ni. The formation of nanoscale icosahedral and fcc Zr2Ni phases leads to the hypoth esis that the icosahedral short-range order exists in the glassy state of t he Zr-Al-Ni-Cu alloy as a unit structure in both phases.