Materials Literature
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The availability of reliable simulation models can reduce the time required for commissioning test rigs as well as preventing components from suffering serious damage during testing. The aim of this study is to set up and validate, against experimental data, a real-time model referring to the Rolls-Royce Fuel Cell Sys…
The 0.65Pb(Mg 1/3 Nb 2/3 )O 3 -0.35PbTiO 3 (PMN-PT) epitaxial thin films were grown on LaNiO 3 /CeO 2 /yttria-stabilized zirconia buffered Si(001) substrates at 600°C in a working pressure of 300 mTorr using pulsed laser deposition. The microstructural and the electrical properties of the films were investigated as a…
The alloy Ti6Al4 V is known to be prone to the formation of adiabatic shear bands when dynamically loaded in shear. This causes a catastrophic decrease of the load carrying capacity and is usually followed by fracture. Although, the main mechanism is recognized to be the competition between strain hardening and therma…
Abstract Poly(3‐hydroxybutyrate) PHB and poly(p‐dioxanone) PPD are examples of promising polymers in tissue engineering. The purpose of this work is to synthesize polyurethanes which combine stereoregular and rigid blocks of PHB with stereoregular and flexible blocks of PPD. In order to guarantee stereoregularity, pol…
Progressive conversion/shrinking core (PC-SC) models of constant-size cylinders were exploited to interpret the decarburization reactions of MgO-C-Si bricks heated up under blown air. Chemical adsorption/solid (or pore) diffusion mechanisms governed the reaction rate. With 5% silicon, chemical adsorption vanished at 1…
When ammonia is added in methane to form carbon films using thermal chemical vapor deposition, effects of the ammonia/methane ratio on the deposition rate and microstructures of carbon films are investigated. Meanwhile, effects of the deposition temperature, working pressure, and residence time on the deposition rate…
Iron-coated Nd-Fe-B composite powder was prepared by thermal decomposition of iron pentacarbonyl in an inert organic solvent in the presence of alkylamine. Though this method is based on a modified solution-phase process to synthesize highly size-controlled iron nanoparticles, it is in turn featured by a suppressed fo…
The present work deals with the particle size effect on the electrical properties in Neodymium Cobaltate‐Manganites System. Neodymium Cobaltate materials could be used as hydrogen storage materials. Nd0.6Sr0.4MnxCo1‐xO3; (x = 0, 0.3, 0.7 and 1 ) were prepared using co‐precipitation method from the initial pure chlorid…
We report on the synthesis of CdSe magic-sized clusters (MSCs) and their evolution into 1D rod and wires retaining the diameter of the order of MSCs. At the beginning of the reaction, different classes of stable MSCs with band gaps of 3.02 eV and 2.57 eV are formed, which exhibit sharp band edge photoluminescence feat…
In order to develop lead-free composition ceramics for piezoelectric actuator, sensor, and transformer applications, (1-x)[Li0.04(Na0.54K0.46)]0.96(Nb0.84Ta0.10Sb0.06)O3 + x(Bi0.5Na0.5)TiO3 (x = 0∼2 mol%) composition ceramics were fabricated by a conventional sintering technique. The influences of (Bi0.5Na0.5)TiO3(abb…
The possibility of using reduced model, that account for non–Boltzmann vibrational distributions for nitrogen monoxide kinetics has been explored. The basic idea is that the rate coefficients, which are proportional to the tail of the vibrational distribution function, are strictly correlated to reactant density rathe…
The evaluation of the importance of both ordered and oriented supramolecular architectures for artificial photosynthesis is a topic of current scientific concern. The objective of this study was to synthesize polymerizable zipper architectures and determine the impact of zipper polymerization on the performance of art…
The effects of partial Si substitution for In on phase transformation and exchange bias (EB) behaviour in as-spun and annealed Ni 48 Mn 39 In 13-x Si x (x = 0-4) ribbons have been investigated. It was observed that an increase in Si concentration strongly affects the magnetic state of the martensitic phase and the EB…
The dielectric, piezoelectric, and acoustic properties of PMN-0.32PT (Pb(Mg(1/3)Nb(2/3)) O(3)-PbTiO(3)) single crystals were investigated as a function of sample thickness ranging from 120 to 30 μm in order to enlighten the origin of property degradation of crystals for high frequency ultrasound applications. Electrom…
Silk fibroin derived from Bombyx mori is a biomacromolecular protein with outstanding biocompatibility. When it was dissolved in highly concentrated CaCl2 solution and then the mixture of the protein and salt was subjected to desalting treatments for long time in flowing water, the resulting liquid silk was water-solu…
This paper focuses on the effect of grain size on the damage mechanism of WaspaloyTM related to the localization of plastic deformation by fatigue. Such effect is examined from nano- to meso-scale by investigating the cyclic behavior of damaged specimens related to the irreversibility of plastic strain. The evolution…
Results of X-ray diffraction (XRD), absorption spectra, and photoluminescence emission spectra are presented for CdS nanoparticles prepared by different techniques. These techniques included preparation of CdS nanoparticles in a liquid crystal state with H2S as well as by mixing two lamellar phases, sol-gel technique,…
In this work, an experimental X-ray Absorption Spectroscopy (XAS) measurement was employed to determine the local structure and valency of Cu and Mn in BiFeO3-BaTiO3. Synchrotron x-ray absorption near-edge structure (XANES) and extended x-ray absorption fine structure (EXAFS) experiments were performed on Cu-doped and…
Different sizes of PbS nanocrystals (NCs) were synthesized from sulfur–amine solution. Instead of using a hot-injection method, we prepared alkylamine-PbS NCs at room temperature in air, where the produced PbS NCs were dispersed in a non-polar solvent. In this work, alkylamine played dual roles as both reducing agent…
The title compound 2 was prepared and its crystal structure was determined at 100 K. The neat solid was examined by temperature dependent (57)Fe Mössbauer effect (ME) spectroscopy over the interval 92 < T < 318 K, and evidences two diamagnetic Fe(II) sites and one paramagnetic Fe(III) site. The latter shows spin-latti…