Materials Literature
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NaxCoO2/Co3O4 layered nano-composite was prepared through the exfoliation, stacking, and sintering processes. Although almost no electrical conduction was observed at low temperatures, a significant increase in conductivity was observed above 750 K, and it reached 1.2×102 Scm−1 at 1200 K, which is comparable to that o…
The spark plasma sintered in situ TiB reinforced titanium metal matrix composite was investigated by EBSD and TEM. The sintered composite consists of 30.8% α-Ti phase, 55.7% β-Ti phase and 12.9% in situ TiB reinforcements. Most of the TiB whiskers distributed along phase boundaries between α-Ti and β-Ti, others locate…
General equations allowing the determination of the elastic and dissipative energy contributions, as the function of the transformed fraction, ξ, to the martensitic transformation in shape memory alloys are derived. It is shown that the derivatives of these energies by ξ can be calculated from the measured hysteresis…
The success of small diameter vascular grafts may be attributed to the ability to accurately mimic the nano‐structured topography of extra‐cellular matrix components of natural vascular tissue. Using this knowledge, the goal of the present study was to develop synthetic biomaterials that promote vascular cell adhesion…
Analysis of the domain structure is performed using the method of matching strains at the interface and the model of thin domain walls. Equations describing the matching interlayers for crystal lattices are derived and the interlayer parameters are obtained for all possible types of domain walls in BiVO 4 . It is show…
Thick PNN-PZT films, about 25 μm, were successfully prepared by combining the screen printing and laser lift-off techniques. PNN-PZT films screen printed on sapphire substrate, after sintering at 1200°C (3 h), are secondary free perovskite, possessing good ferroelectric properties (Pr = 16.4 μC/cm2, Ec = 12.6 kV/cm).…
Cone-type and spherical lysine dendrimers up to generation 3 based on thiacalix[4]arene core units were successfully prepared and characterized in order to use as molecular scaffolds for supramolecular host systems.
The phenomenon of low-temperature homogenization (LTH) during interdiffusion is studied under condition a t Dv £ 2 / 1 ) ( (Dv is the bulk diffusion coefficient, a is the lattice parameter) using nano-objects of binary Cu-Ni and Cr-Ni systems compacted from nano-powders and produced by mechanical alloying. Two stages…
Relaxation of photo-generated carriers in anatase form of crystalline titanium dioxide has ben studied by the photoconductivity measurement. Illumination of anatase crystal with UV light at 300 K has found to induce persistent enhancement in conductivity over 3000 seconds. The magnitude of the induced change is 4000 t…
An asymmetric binary Margules formulation for excess Gibbs energy, enthalpy, and entropy is adequate to describe the 1 bar halite-sylvite solvus in NaCl-KCl (Thompson and Waldbaum 1969). However, a binary Margules formulation is not adequate to describe excess volumes of single-phase chlorides in P-V-T-X from ambient…
Changes in hydrogen distribution in δ-phase titanium hydrides (TiH1.92∼1.95), covered with titanium oxide layers (TiO and TiO2), were investigated by elastic recoil detection analysis (ERDA) after isochronal and isothermal annealing experiments. The hydrogen concentration near to the surface of the hydride exponential…
The Harman method, which is generally utilized in the evaluation of the figure of merit, Z, has been improved to measure several thermoelectric properties. We fabricated equipment for simultaneous measurement of not only the resistivity /spl rho/ and Z but also the Seebeck coefficient /spl alpha/. The thermal conducti…
Decomplexation of organic ligands through redox titration has been applied to catalyst synthesis, developing an improved preparation method for Fe-ferrierite (Fe-FER), the catalyst showing excellent performance and durability for N2O decomposition under realistic conditions for nitric acid plants.
Single crystalline beta-Ga2O3 nanowire and nanoribbon materials were synthesized, and electrical and mechanical properties were studied for sensing applications. The structural analysis showed that the Ga2O3 nanomaterials were stoicheometric and had the same crystal lattice structure as the beta phase Ga2O3 crystal. T…
The process of vegetable tanning is hindered by the astringency of the tannins, which affects the development of their use as organic tanning agents for modern purposes. The use of non tans, either from natural sources such as green tea or by degrading tannins into non tannins, avoids the problem of hindered penetrati…
The relationship between energy requirement and barrier properties in the production of greaseproof paper
A high temperature super-conducting transformer (HTST) has been built. It has been designed to operate in liquid nitrogen, an environmentally benign element that represents little fire and personnel safety risk. The transformer is based on the concept of a partial or open core, where the magnetic circuit is incomplete…
We describe a new NIST database for the Simulation of Electron Spectra for Surface Analysis (SESSA). This database provides data for the many parameters needed in quantitative Auger electron spectroscopy (AES) and X‐ray photoelectron spectroscopy (XPS). In addition, AES and XPS spectra can be simulated for layered sam…
Artificially creviced Alloy 22 (N06022) is susceptible to crevice corrosion in presence of high chloride aqueous solution when high temperatures and high anodic potentials are applied. The presence of oxyanions in the electrolyte, especially nitrate, inhibits the nucleation and growth of crevice corrosion. Crevice cor…
In this contribution, the degradation of solid oxide fuel cells (SOFC) is accelerated by means of high current load cycles. The ageing phenomena are studied and characterised by material analyses. The results show that degradation of cell performance is mainly caused by the delamination of the cathode layer. The accum…