title: Structural investigation and mechanical properties of a representative of a new class of materials: nanograined metallic glasses.
abstract: 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 ∼5.3 GPa and a low elastic modulus of ∼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.
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan. chenn@wpi-aimr.tohoku.ac.jp
authors.forename: N
authors.initials: N
authors.lastname: Chen
authors.forename: D V
authors.initials: DV
authors.lastname: Louzguine-Luzgin
authors.forename: G Q
authors.initials: GQ
authors.lastname: Xie
authors.forename: P
authors.initials: P
authors.lastname: Sharma
authors.forename: J H
authors.initials: JH
authors.lastname: Perepezko
authors.forename: M
authors.initials: M
authors.lastname: Esashi
authors.forename: A R
authors.initials: AR
authors.lastname: Yavari
authors.forename: A
authors.initials: A
authors.lastname: Inoue
mesh_terms: D055119:Elastic Modulus; D005898:Glass / Q000737:chemistry*; D006244:Hardness; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D008968:Molecular Conformation; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength