Materials Literature
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The development of First Wall and Blanket materials which are capable of withstanding many years the high neutron and heat fluxes, is for material scientists a critical path to fusion power. In an energy generating fusion reactor, such structural materials will be exposed to very high levels of irradiation damage up t…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTObtaining Concentration Profiles from Computer Simulation Structure FactorsAndrew J. Schultz, Carol K. Hall, and Jan GenzerView Author Information Department of Chemical and Biomolecular Engineering, North Carolina State University,…
An optically transparent and electrically conducting oxide Ta2O epitaxial thin film has been fabricated and characterized. In our experiments, we grew epitaxial Ta films on r-cut sapphire crystal substrates, which were subsequently oxidized into Ta2O films. The x-ray θ-2θ scan peaks match the American Society for Test…
We compute the intrinsic dielectric and piezoelectric properties of single domain, mechanically free, and surface charge compensated PbTiO3 nanocrystals (n-Pt) with no depolarization fields, undergoing a finite size induced first order tetragonal→cubic ferrodistortive phase transition. By using a Landau–Devonshire typ…
The aim of the current work was to investigate using fungi to treat hemp fibre to create better bonding characteristics in natural fibre reinforced polypropylene composites. X-ray diffraction (XRD), lignin testing and scanning electron microscopy (SEM), were used to characterise the effect of treatment on hemp fibres.…
Epitaxial SrTiO3 thin films were deposited on (001) LaAlO3 single crystals by pulsed laser deposition. The postannealing effect was studied by annealing the deposited films at 1100°C in O2 atmosphere for 4h. It was found that the postannealing treatment enhances the in-plane permittivity of the film. An analysis of th…
Magnesium alloy sheets had to be rolled at elevated temperature to avoid cracking. The poor workability of magnesium alloy is ascribed to its hcp crystallography and insufficient activation of independent slip systems. Present authors have succeeded in 1-pass heavy rolling of AZ31 magnesium alloy sheet below 473K by r…
Polyvinyl alcohol (PVA) is a unique synthetic biocompatible polymer and it has a large number of hydroxyl groups that can react with many kinds of functional groups. In the present work, nanostructured PVA/TEOS hybrids were characterized by Small-angle X-ray Scattering (SAXS) associated with Fourier Transform Infrared…
We have investigated structural, magnetic, and optical properties of Zn1−x(Mnx∕2Cox∕2)O (x=0.1 and 0.2) diluted magnetic semiconducting nanoparticles synthesized by chemical “pyrophoric reaction process.” X-ray diffraction analysis clearly shows that the samples are single phase in ZnO wurtzite structure, where the av…
The degradation and damage of carbon nanotube (CNT) films caused by field emission were investigated by carefully studying the effect of emission current density of different levels on the CNT film. It is found that the behavior of the vacuum breakdown of a CNT film is very different from a metal cathode. A critical e…
With the aim of emphasizing the role of bonding energy between atoms in the decomposition of the metastable gamma phase, γU(Mo), and the solubility of third elements in U–Mo alloy, we have evaluated the thermodynamic functions of the binary U–Mo system by using first-principles calculated total energies in a cluster e…
A metamaterial design is presented with an effectively zero index of refraction, which utilises Drude-type material blocks arranged in a checkerboard pattern within a nondispersive dielectric host. An averaging effect over constituent materials of the checkerboard structure yields an effective permittivity that approa…
This work describes the composition and bonding structure of hydrogenated carbon nitride (a-CNx:H) films synthesized by electron cyclotron resonance chemical vapor deposition using as precursor gases argon, methane, and nitrogen. The composition of the films was derived from Rutherford backscattering and elastic recoi…
Sulphoaluminate-alite cement (SAAC) was successfully prepared from high alumina fly ash. XRD analysis indicated that the optimal mineralogical phase of cement clinker was obtained under condition of MG=1.05, MS =0.95 at 1300oC, and C4A3 S reached the strongest intensity and is 58.73% in the phase of calcined clinckers…
Abstract Using an oxidative coupling polymerization of the macromonomers of oligoaniline and p ‐phenylenediamine, we have prepared an electroactive hyperbranched polyamide, exhibiting an exciting molecular structure, and interesting spectroscopic and electrochemical properties. The molecular structure of the electroac…
Tungsten oxides are of interest as an oxidant for metals in metastable intermolecular composites (MICs), a reactive nanoscale powder useful for such applications as electric matches and gun primers. Smaller particles typically lead to fast reaction rates in this class of energetic material, and we have synthesized nan…
Ultra-low carbon steel (ferritic steel), commercial purity aluminum and high purity copper were heavily deformed by the accumulative roll bonding (ARB) process, and the microstructural evolution during the ARB was analyzed. Significant grain refinement by grain subdivision mechanism was confirmed in all three kinds of…
Barium strontium titanate (Ba0.5Sr0.5TiO3 or BST) films were grown on SiO2∕Si substrate by means of a reactive pulsed laser deposition technique. The microstructural and surface morphology of BST films were characterized by x-ray diffraction, scanning electron microscopy, and atomic force microscopy. Films deposited a…
Abstract Soluble poly(imide‐siloxane)s were obtained by carefully designing the synthesis and introducing poly(ethylene glycol) (PEG) units, thereby making the system amphiphilic in nature. The solubility of the synthesized PEG containing poly(mide‐siloxane)s (PPIS) in various solvents was tested and their thermal pro…
Effects of pretreatment on the nuclei formation of ultrananocrystalline diamond (UNCD) on Si substrates were studied. Either precoating a thin layer of titanium (∼400nm) or ultrasonication pretreatment using diamond and titanium mixed powder (D&T process) enhances the nucleation process on Si substrates markedly,…