Development of new Al-based nanocomposites by mechanical alloying

    Authors

    N. Al-Aqeeli; G. Mendoza-Suarez; C. Suryanarayana;R. A. L. Drew

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.

    Keywords

    nanocomposites; mechanical alloying; x-ray diffraction; transmission; electron microscopy; intermetaffics; METASTABLE PHASE; SOLID-SOLUTIONS; MG ALLOY; ZR; TEMPERATURES; SYSTEM; FE; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering

    Abstract

    Al-based binary (Al-Mg) and ternary (Al-Mg-Zr) elemental powder mixtures were mechanically alloyed to develop new Al-Mg-Zr nanocomposite materials. The phase evolution was studied in the as-milled and heat-treated powders by XRD and TEM/EDS analyses. For the binary Al-Mg alloy, the predominant phase was an Al(Mg) solid solution (SS) and an amorphous phase was not possible to be synthesized. Upon adding 5 at.% Zr to the Al-10Mg blended powder, some free Mg was present in addition to the formation of an AI(Zr,Mg)SS, which transformed to the Al3Zr intermetallic after annealing. When the Zr content was increased a nanocomposite of a solid solution and an intermetallic was obtained with considerable improvement in terms of structural stability and hardness. The presence of an oxide phase at 35% Zr might be responsible for the increased hardness in this particular alloy. (c) 2007 Elsevier B.V. All rights reserved.

    Journal Title

    Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing

    Volume

    480

    Issue/Number

    1-2

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    392

    Last Page

    396

    WOS Identifier

    WOS:000255881300051

    ISSN

    0921-5093

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