SnSe alloy is examined for the first time as an anode for Na-ion batteries, and shows excellent electrochemical performance including a high reversible capacity of 707 mA h g(-1) and stable cycle performance over 50 cycles. Upon sodiation, SnSe is changed into amorphous NaxSn nanodomains dispersed in crystalline Na2Se, and SnSe is reversibly restored after desodiation.

Fe-based metallic glasses such as FINEMET, NANOPERM and HITPERM usually produced from amorphous precursors in various forms have been intensively studied over the past thirty years, because these materials exhibit a unique combination of soft magnetic properties [1], which is very interesting from a scientifi c point of view. The application of these materials at elevated temperatures is determ...

We have studied the diffusion in Ce/Ni multilayers with different periods (65 A, 195 A, 325 A). We have observed that the find state of the diffusion process could vary as a function of the period, giving respectively a homogeneous amorphous alloy, a homogeneous crystalline compound and mixed phases.

The characterization of the crystallization kinetics of an amorphous soft magnetic alloy, Fe88Zr7B4Cu1, called NANOPERM, is presented. Vibrating sample magnetometry (VSM), X-ray diffractometry, and differential scanning calorimetry have been used to observe crystallization kinetics. The VSM observations take advantage of the Curie temperature of the amorphous phase c amorphous of the NANOPERM a...

Differential scanning calorimetry (DSC) was used to determine the thermodynamic functions of the undercooled liquid and the amorphous phase with respect to the crystalline state of the ~41.2Ti13.8CU125Nilo.OBe22.5 bulk mltallic glass forming alloy. The specific heat capacities of this alloy. in the undercooled liquid, the amorphous state and the crystal were determined. The differences in entha...

We demonstrate a route to synthesize ultra high-temperature ceramic coatings of ZrB2 at temperatures below 1,300 K using Zr/B reactive multilayers. Highly textured crystalline ZrB2 is formed at modest temperatures, because of the absence of any oxide at the interface between Zr and B, and the very short diffusion distance that is inherent to the multilayer geometry. The kinetics of the ZrB2 for...

In this research, mechanical alloying was used to produce Ti-50Al, Ti-45Al-5Cr and Ti-45Al-5W (at%) alloys. The effect of ternary addition (Cr and W) on microstructure and production efficiency of TiAl alloy were investigated. Alloying was performed in a planetary mill and the milling time varying from 5 to 70h. The structural evaluation in these powders was done by X-ray diffraction (XRD) tech...

Amorphous complexions in nanocrystalline metals have the potential to improve mechanical properties and radiation tolerance, as well resistance grain growth. In this study, stability of amorphous binary ternary Cu-based alloys is investigated by observing effect cooling rate from high temperature on occurrence amorphous-to-ordered complexion transitions. Bulk Cu-Zr Cu-Zr-Hf alloy samples were a...