A group of oxohalides, where Ni3Sb4O6F6 is one example, has been investigated with respect to its electrochemical reactions toward Li/Li. In situ and ex situ XRD measurements reveal that the original structure collapses and the material becomes amorphous upon insertion of Li at low potentials versus Li/Li. With continued cycling, a nanocrystalline phase of NiSb, which reacts reversibly with Li,...

in this study, nickel-phosphorus coating was prepared by electrodeposition technique on the 304 stainless steel substrate. the effects of current density, phosphorous acid concentration, time and ph on the phosphorous content was investigated using taguchi method. a uniform amorphous-nanocrystalline structure (ni-12%p) was obtained. sem, eds, tem and xrd were used in order to study the surface ...

This study addresses the fabrication of nanocrystalline Fe–Co–Ni alloy using two operations: mechanical alloying (MA) of elemental powders and hot pressing (HP). The evolution of the phase composition and structure of the powder particles after MA was investigated. Ball milling with rotation speed 700 rpm for 15–20 min allows the production of a bcc Fe-based supersaturated solid solution. Durin...

Microcrystalline and nanocrystalline AlCrFeCoNi high-entropy alloy (HEA) coatings were applied on Inconel 718 superalloy using the atmospheric plasma spraying (APS) process. The high-temperature oxidation behavior of microcrystalline HEA-coated was examined at 1100 °C under air atmosphere for 50 cycles cyclic heating cooling (1 h each cycle). kinetics both nanocrystalline- microcrystalline-coat...

Specific heat enhancement in several common nanocrystalline metals is established by comparison with their bulk counterparts. Measurements were carried out in Fe, Cu, Ni and binary alloy LaAl(2). The excess specific heat is evidenced as a low temperature peak below 65 K and a high temperature slope above 150 K. The experimental data are in good agreement with a model which considers contributio...