Structural investigation and mechanical properties of a representative of a new class of materials: nanograined metallic glasses. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue International Journal of Nanotechnology Année : 2012

Structural investigation and mechanical properties of a representative of a new class of materials: nanograined metallic glasses.

Résumé

A new class of materials: Au-based nanograined metallic glasses (NGMGs) were synthesized using magnetron sputtering with powder targets. A detailed study by x-ray diffraction and high-resolution transmission electron microscopy (TEM) documents the unique nanoscale granular structure of the Au-based NGMG. This material inherited the good mechanical properties of metallic glasses, showing a high hardness of similar to 5.3 GPa and a low elastic modulus of similar to 79 GPa. In addition, in contrast to most MGs the nanoglassy particles can deform along the loading direction, exhibiting unique tensile elongation up to 100%. During thermal crystallization of NGMG material, even smaller sized Au solid solution nanocrystals are formed within the glassy nanograins, offering a new way for production of the nanocomposites with tailored structural length scales.

Domaines

Matériaux
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Dates et versions

hal-00794220 , version 1 (12-05-2020)

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Citer

N. Chen, D.V. Louzguine-Luzgin, G.Q. Xie, P. Sharma, J.H. Perepezko, et al.. Structural investigation and mechanical properties of a representative of a new class of materials: nanograined metallic glasses.. International Journal of Nanotechnology, 2012, 24 (4), ⟨10.1088/0957-4484/24/4/045610⟩. ⟨hal-00794220⟩
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