0026-2714/$ see front matter 2012 Elsevier Ltd. A http://dx.doi.org/10.1016/j.microrel.2012.06.051 ⇑ Corresponding author. Tel.: +7 812 247 91 93; fax E-mail address: [email protected] (E.I. Shabunina). Unpredictable fast failure of blue power InGaN/GaN LEDs is caused by redistribution of In under action of injection currents between nano-scale regions of InGaN alloy with non-equilibrium composi...

SmartLab is the world’s first high resolution diffractometer with horizontal sample mounting theta-theta geometry. Designed for the structural analysis of advanced materials and thin films, the system combines a uniquely flexible instrument geometry with a comprehensive knowledge-based software platform. SmartLab is exceptional in that it enables users with little or no expertise in diffraction...

Powder metallurgy has been used for the manufacture of fully dense, which have not reacted composites consisting of a matrix of copper containing 50 -60 vol% particles with negative thermal ZrW2O8 expansion. On cycling between 25 and 300°C, the compounds showed coefficients thermal expansion which varies rapidly with temperature and significantly larger than expected by theory. Improvements in ...

Nano-Y2O3 reinforced Ti-47.7Al-7.1Nb-(V, Cr) alloy was fabricated by a powder metallurgy route using spark plasma sintering (SPS), and the influence of nano-Y2O3 contents on microstructure mechanical properties were investigated systematically. The results revealed that ultimate tensile strength elongation 570 ± 28 MPa 1.7 0.6% at 800 °C, 460 23 6.1 0.4% 900 °C with no nano-Y2O3, 662 24 5.5 0.5...

We report here the successful fabrication of nano-whisker hydroxyapatite (nHA) coatings on Mg alloy by using a simple one-step hydrothermal process in aqueous solution. The nHA coating shows uniform structure and high crystallinity. Results indicate that nHA coating is promising for improving the in vitro corrosion and cytocompatibility properties of Mg-based implants and devices for bone tissu...

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The effect of external constraints on Li diffusion in high-capacity Li-ion battery electrodes is investigated using a coupled finite deformation theory. It is found that thinfilm electrodes on rigid substrates experience much slower diffusion rates compared with free-standing films with the same material properties and geometric dimensions. More importantly, the study reveals that mechanical dr...

The evolution of nano-scale Fe particles precipitated in a Cu–Fe alloy has been examined from the viewpoint of the relationship between the microstructure and magnetic properties, using conventional, high-resolution and Lorentz electron microscopy, and magnetic measurements. It has been revealed that spherical Fe particles have a tendency to align along the <001> direction in a Cu matrix at the...