Si is a promising candidate anode material for the next generation Li-ion battery because of its high capacity. However, Si inherently suffers from its large volume change (~300%) when alloyed with Li during the typical charge/discharge cycles, which degrades battery performance and causes potential safety issues. Understanding of microstructural evolutions of Si in the lithiation/delithiation ...

We demonstrate the refinement and uniform distribution of the crystalline dendritic phase by friction stir processing (FSP) of titanium based in situ ductile-phase reinforced metallic glass composite. The average size of the dendrites was reduced by almost a factor of five (from 24 μm to 5 μm) for the highest tool rotational speed of 900 rpm. The large inter-connected dendrites become more frag...

Since the discovery of the first metallic glass in 1960 (1), amorphous metals have been made in a variety of compositions. However, they have been largely fabricated as thin ribbons less than a millimeter in thickness because fast cooling rates (;10 K/sec) have been required to retain the metastable amorphous phase. Recently, however, a new class of amorphous metals has been developed which req...

Memory based on phase change materials is currently the most promising candidate for bridging the gap in access time between memory and storage in traditional memory hierarchy. However, multilevel storage is still hindered by the so-called resistance drift commonly related to structural relaxation of the amorphous phase. Here, we present the temporal evolution of infrared spectra measured on am...

The continuous random network model is widely used as a realistic description of the structure of covalent glasses and amorphous solids. We point out that in real glasses and amorphous materials, there are non-random structural elements that go beyond just simple chemical ordering. We propose that the network can self-organize at its formation or ®ctive temperature, and examine some of the poss...

Stoichiometric reactions of Pd(0) nanoparticles with various amounts of white phosphorus (P4) are an efficient route to convert them into the corresponding Pd phosphides Pd(x)P(y). Formation of crystallized palladium phosphide nanoparticles is a two-step process, which allows exploring in detail the phase transitions of the Pd(x)P(y) system, from amorphous Pd-P nanoparticles (formed in a first ...

Poorly water soluble drugs are considered a major challenge within development of drug formulations for oral delivery. Several formulations strategies exist to overcome this issue including salt formation and solid dispersions to name a few. Recently, a new formulation approach was introduced combining two drug molecules or a drug and an amino acid to form a so-called co-amorphous system. Sever...