Bulk amorphous alloys: Preparation and properties of (Mg0.98Al0.02)x(Cu0.75Y0.25)100-x

Morten Mostgaard Eldrup, Allan Schrøder Pedersen, M. Ohnuma, Nini Pryds, Søren Linderoth

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    New bulk amorphous quaternary alloys of the composition (Mg1-xAlx)(60)Cu30Y10 (x = 0 - 0.17) were recently reported by the authors and preliminary results of the influence of Al content on the ability to form a bulk amorphous phase were presented. In the present note we extend this work to look for the influence of the Mg-Al content on the glass forming ability by studying a range of compositions, (Mg0.98Al0.02)(x)(Cu0.75Y0.25)(100-x) for x = 60 - 80 at.%. As previously, the alloys were prepared by a relatively simple technique, i.e. rapid cooling of the melt in a wedge-shaped copper mould. This method provides a range of cooling rates within a single ingot during the solidification that link the slowly and rapidly cooled microstructure for each alloy composition. Hence, the maximum thickness of the amorphous part of the cast material will be a measure of the glass forming ability (GFA) of the particular alloy. X-ray diffraction (XRD) and Differential Scanning Calorimetry (DSC) have been used to investigate the structure and the various structural transitions in the alloys. One observation is that the GFA decreases with increasing content of (Mg0.98Al0.02)(x). For x > similar to 75 at.% no amorphous phase is formed. Based on these measurements a phase diagram was constructed.
    Original languageEnglish
    Title of host publicationMetastable, Mechanically Alloyed and Nanocrystalline Materials : PTS 1 and 2
    PublisherTrans Tech Publications Ltd.
    Publication date2000
    ISBN (Print)0-87849-858-3
    Publication statusPublished - 2000
    EventInternational symposium on metastable, mechanically alloyed and nanocrystalline materials - Dresden (DE), 30 Aug - 3 Sep
    Duration: 1 Jan 1999 → …


    ConferenceInternational symposium on metastable, mechanically alloyed and nanocrystalline materials
    CityDresden (DE), 30 Aug - 3 Sep
    Period01/01/1999 → …
    SeriesMaterials Science Forum


    • bulk amorphous alloy
    • glass forming ability
    • Mg-based alloys
    • quaternary alloys


    Dive into the research topics of 'Bulk amorphous alloys: Preparation and properties of (Mg<sub>0</sub><sub>.</sub><sub>9</sub><sub>8</sub>Al<sub>0</sub><sub>.</sub><sub>0</sub><sub>2</sub>)<sub>x</sub>(Cu<sub>0</sub><sub>.</sub><sub>7</sub><sub>5</sub>Y<sub>0</sub><sub>.</sub><sub>2</sub><sub>5</sub>)<sub>1</sub><sub>0</sub><sub>0</sub><sub>-</sub><sub>x</sub>'. Together they form a unique fingerprint.

    Cite this