Mechanically alloyed Al-Li powders

Document Type

Article

Publication Date

4-25-2007

Abstract

Mechanically alloyed powders with the composition Al0.7Li0.3 are synthesized. Materials milled for different times are studied using electron microscopy, X-ray diffraction, and thermal analysis. A solid solution of Li in Al (α-phase) is formed with as much as 10 at.% of dissolved Li. The LiAl intermetallic δ-phase is readily produced by mechanical alloying but disappears after extended milling times. The final product of milling for 102 h consists of an X-ray amorphous phase. Mechanically alloyed powders heated in inert environment exhibit several weak exothermic reactions between 420 and 700 K, and two endothermic reactions, around 810 and 870 K. All the observed relaxation processes become less pronounced and eventually become undetectable as the milling time increases and an amorphous material is produced. © 2006 Elsevier B.V. All rights reserved.

Identifier

33847414168 (Scopus)

Publication Title

Journal of Alloys and Compounds

External Full Text Location

https://doi.org/10.1016/j.jallcom.2006.05.114

ISSN

09258388

First Page

111

Last Page

115

Issue

1-2

Volume

432

Grant

N00014-00-1-0446

Fund Ref

Office of Naval Research

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