It is believed that the dynamics of dislocation processes during the deformation of nanocrystalline materials can only be visualized by computational simulations. Here we demonstrate that observations of dislocation processes during the deformation of nanocrystalline Ni with grain sizes as small as 10 nm can be achieved by using a combination of in situ tensile straining and high-resolution tra...

Nanocrystalline partially stabilised zirconia (PSZ) and yttria-fully stabilised zirconia (YSZ) powders were prepared by solution combustion process. Nanocrystalline nature of the powders was confirmed by XRD and TEM. Nanocomposite Ni/PSZ and Ni/YSZ films were electrodeposited from a suspension of nanoparticles in nickel sulfamate solution. The strengthening of the nanocomposite due to nanoparti...

Thin-film nanocrystalline zinc oxide electrodes were fabricated by electrochemical deposition of ZnO on FTO-coated glass slides. promoted CdO coating top in amounts corresponding to 0.8, 0.1, and 0.05 C cm−2 electric units. Modification a small amount CdO, cm−2, shifts the photoactivity composite photoanode into visible part solar spectrum. It is shown that ZnO/(0.05C)CdO/FTO electrode demonstr...

Confirmation of the suggestion of B site zn2+ in nanocrystalline ZnFe204 has heen sought through X-ray diffraction, 5 7 ~ e Miissbauer spectroscopy, magnetic susceptibility and TEM measurements on bulk and nanocrystalline samples prepared by different techniques. Measurements on bulk samples are in agreement with previously reported ones. Samples prepared at low temperature from solutions of sa...

Coexistent amorphous and nanoscale bcc-Mg7Li3 phases were found in slowly quenched alloys of the Mg65–xLixCu25Y10 system containing 3 to 15 at. % Li. The crystallization behavior of these alloys has been studied. The grain size of the nanocrystalline bcc phase which is formed ranges from 2 to 20 nm. The volume fraction of nanocrystalline phases as well as the grain size of the nanocrystals incr...

Nanocrystalline silicon is a promising material for future ultralarge scale integrated circuits and display devices. Various methods have been demonstrated for the fabrication of nanocrystalline silicon with size less than 10nm. We have prepared nanocrystalline silicon ultrafine particles by very-high-frequency plasma decomposition of silane and hydrogen. Nanoparticles formed in the plasma cell...

Nanocrystalline materials offer very high strength but are typically limited in their strain to failure, and efforts to improve deformability in these materials are usually found to be at the expense of strength. Using a combination of quantitative in situ compression in a transmission electron microscope and finite-element analysis, we show that the mechanical properties of nanoparticles can b...

Diffraction anomalous fine-structure (DAFS) and extended x-ray absorption fine-structure (EXAFS) measurements were combined to determine short range order (SRO) about a single atomic type in a sample of mixed amorphous and nanocrystalline phases of germanium. EXAFS yields information about the SRO of all Ge atoms in the sample, while DAFS determines the SRO of only the ordered fraction. We dete...

simple, low temperature and environmentally benign green route is proposed for preparation of nanocrystalline zno in presence of a low-cost and halide-free room-temperature ionic liquid (rtil) by refluxing at 95 °c for 60 minutes. the x-ray diffraction (xrd) studies display that the products are well-crystallized in the form of wurtzite hexagonal. morphology of the as-prepared zno was character...

in this study, the removal of cadmium and lead ions from aqueous solution by nanocrystalline magnetite was investigated. the nanocrystalline magnetite was synthesized by mechanochemical activation of hematite in a high energy planetary mill in argon atmosphere for 45 hours. the ability of the synthesized nanocrystalline magnetite for removal of cd(ii) and pb(ii) from aqueous solutions was studi...