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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BOS4-0010-0009

Czasopismo

Archives of Materials Science

Tytuł artykułu

Crystallisation sequence during the devitrification of Al-based glassy alloys.

Autorzy Boucharat, N.  Rösner, H.  Valiev, R.Z.  Wilde, G. 
Treść / Zawartość
Warianty tytułu
Konferencja International Conference on Fabrication and Properties of Metallic Nanomaterials, Warsaw, 17-19 June, 2004.
Języki publikacji EN
Abstrakty
EN The effect of thermal treatment and severe plastic deformation such as high pressure torsion straining (HPT) on the crystalisation behaviour of rapidly quenched Al88Y7Fe2 glasses was investigated. Calorymetry and microstructural analyses clearly indicate that HPT strongly promotes the development of an extremely high density of nanocrystals. Thus, plastic deformation of marginal glass formers at ambient temperature presents an alternative and rather efficient synthesis route for the development of new bulk nanostructured materials. Additionally, it is shown that the diffusional control during crystallization involves the formation of a concentration gradient of varying magnitude at the interface of growing Al-nanocrystals, affecting the nucleation conditions for new phases. Indeed, the adjustment of the concentration gradient within a certain interval can promote the formation of the so-called "transient" phase. The results obtained indicate that the control of the concentration gradient represents a new perspective for active phase selection.
Słowa kluczowe
PL stop aluminium   krystalizacja  
EN aluminium alloy   crystallization  
Wydawca Komitet Nauki o Materiałach PAN
Czasopismo Archives of Materials Science
Rocznik 2004
Tom Vol. 25, nr 4
Strony 357--363
Opis fizyczny
Twórcy
autor Boucharat, N.
autor Rösner, H.
autor Valiev, R.Z.
autor Wilde, G.
  • Forschungszentrum Karlsruhe, Institut für Nanotechnologie, P.O. Box 3640, 76021 Karlsruhe, Germany
Bibliografia
Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-article-BOS4-0010-0009
Identyfikatory