Synthesis and mechanical behavior of nanocomposite Mg-based bulk metallic glasses

Jean-Louis Soubeyroux (1) , Sylvain Puech (1, 2) , Patricia Donnadieu (3) , Jean-Jacques Blandin (2)

1 NEEL - MagSup - Magnétisme et Supraconductivité
2 GPM2 - Génie physique et mécanique des matériaux
3 SIMaP - Science et Ingénierie des Matériaux et Procédés

Nanocomposites can be produced by partial crystallization of bulk metallic glasses (BMG). The introduction of such nanocrystals in an amorphous matrix can sharply change the mechanical behavior of the glass at room temperature. In the present study, the effect of crystals in Mg-based BMG is studied by partial crystallization of the Mg65Cu25Gd10 and addition of 3 at.% of iron. Various techniques (DSC, DRX, TEM) are used to get data about the nature, the volume fraction or the average size of the crystals. Mechanical properties at room temperature are investigated in compression. The fracture stress is enhanced by iron addition, but no favorable effect of partial crystallization is observed for the Mg65Cu25Gd10 BMG. These results are discussed in relation with the associated microstructures.

Mots clés: Bulk metallic glasses; Magnesium alloys; Crystallization; Mg65Cu25Gd10

Domaines: Matériaux

Jean-Louis Soubeyroux, Sylvain Puech, Patricia Donnadieu, Jean-Jacques Blandin. Synthesis and mechanical behavior of nanocomposite Mg-based bulk metallic glasses. Journal of Alloys and Compounds, 2007, 434-435, pp.84-87. ⟨10.1016/j.jallcom.2006.08.297⟩. ⟨hal-00264760⟩