Solid state synthesis of amorphous and/or nanocrystalline Al40Zr40Si20 alloy by mechanical alloying

Manna, I. ; Chattopadhyay, P. P. ; Banhart, F. ; Fecht, H. -J. (2004) Solid state synthesis of amorphous and/or nanocrystalline Al40Zr40Si20 alloy by mechanical alloying Materials Letters, 58 (3-4). pp. 403-407. ISSN 0167-577X

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S01675...

Related URL: http://dx.doi.org/10.1016/S0167-577X(03)00511-1

Abstract

Mechanical alloying of Al40Zr40Si200 powder blend has been carried out in a high-energy shaker ball mill up to 50 h. Microstructural evolution at different stages of milling has been characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS). During milling, elemental Zr seems to undergo a HCP→FCC polymorphic transformation that is closely related to grain refinement and plastic strain. On the other hand, nanocrystallization and mutual dissolution of the elemental blend lead to partial solid state amorphization and development of a composite microstructure comprising of varying proportion of an amorphous phase and nanocrystalline FCC-Zr based solid solution by appropriate hours of milling. In general, the present results compare well with that from our earlier studies on mechanical alloying of Al40Nb40Si20 and mechanical milling of elemental Zr, respectively.

Item Type:Article
Source:Copyright of this article belongs to Materials Research Society.
Keywords:Mechanical Alloying; Aluminum Alloy; Amorphous; Nanocrystals; Polymorphism
ID Code:18786
Deposited On:17 Nov 2010 12:24
Last Modified:06 Jun 2011 08:20

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