Model for Medium-Range Order in Metallic Glasses

Short and Medium Range Order in Se1-xTex Glasses

Complementary XAFS measurements (LURE and NSLS) of Sel,Te, glasses have been canied out on both the Se and Te Kedges at low and room temperatures. Using a multi-shell best fit analysis procedure, we have reconstructed the Se and Te local environment: (i)first shell intrachain nearest neighbors (Se-Sel, Se-Tel, Te-Se~,and Te-Tel); (ii) second shell intrachain (Se-Sez and Se-Tez) and interchain n...

Reformation Capability of Short-Range Order and Their Medium-Range Connections Regulates Deformability of Bulk Metallic Glasses

Metallic glasses (MGs) typically have high yield strength while low ductility, and the latter is commonly considered as the Achilles' heel of MGs. Elucidate the mechanism for such low ductility becomes the research focus of this field. With molecular level simulations, we show the degree of short-range order (SRO) of atomic structure for brittle Fe-based glass decreases dramatically during the ...

A structural model for metallic glasses.

Despite the intense interest in metallic glasses for a variety of engineering applications, many details of their structure remain a mystery. Here, we present the first compelling atomic structural model for metallic glasses. This structural model is based on a new sphere-packing scheme-the dense packing of atomic clusters. Random positioning of solvent atoms and medium-range atomic order of so...

Medium-range order and cohesive energy in Ge x Se 1-x glasses

2014 The study of the electronic structure of GexSe1-x glasses (x ~ 0.33 ) is presented using the tight-binding approximation with a self-consistent Hartree model. The results indicate that the leading term in cohesive energy, when the possible structures of a glass with a given composition are compared, is due to the transfer of electronic charges from Ge atoms to Se atoms. Excluding Ge-Ge bon...

Positional (dis)order and Compositional (non-)homogeneity in Metallic Glasses