Materials Literature
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The X-ray refraction imaging technique was applied to the quantitative study of hydrogen diffusion in titanium-hydride. Hydrogen diffusivity in titanium-hydride was determined by direct observation of the hydride. The hydride was formed on the surface of titanium by electrolytic-charging at 63°C. The specimens were cu…
VC/Fe composite samples were fabricated by sintering at 1050, 1100 and 1150°C in vacuum. The microstructure and mechanical properties of samples were examined, and the relationship of structure and mechanical properties for VC/Fe composite sintered at different temperature were studied. The results show that fracture…
The casting of binary alloys is one of the main industrial applications in the solidification phase change. The transport phenomena of the liquid binary alloy during solidification, such as thermosolutal convection, can affect the material quality of solidified ingots. This study focuses on the effect of three differe…
The dielectric properties viz. dielectric constant and dielectric loss were studied in the frequency range (10-100kHz) and temperature range (315-350K) for Te15(Se100-xBix)85 (x= 0,3, 5 at.%) amorphous glasses. The dielectric constant and dielectric loss are found to increase with temperature and decrease with the fre…
Experimental data on the strengthening of crude ethyl alcohol in a packed column, and the results of a study on contact stages of non adiabatic thermal rectification are presented.
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation A. Costescu, S. Spânulescu, C. Stoica; Elastic scattering of X-rays and gamma rays by 2S electron…
Two-dimensional electron gases based on conventional semiconductors such as Si or GaAs have played a pivotal role in fundamental science and technology. Their high mobilities enabled the discovery of the integer and fractional quantum Hall effects and are exploited in high electron mobility transistors. Recent work ha…
We are describing a novel way to find the Mueller matrix of an arbitrary optical element, by taking advantage of projection of resulting polarization states on four known input polarization states by using Simon-Mukunda gadget.
New MOCVD grown UV (ultra-violet) LEDs using low dislocation density GaN buffer layers on sapphire have been studied. Two different LED characteristics of GaN substrates, i.e. 5um-thick and 20um-thick buffer layers, on sapphire are compared with each other. The enhanced LED characteristics show ~29.5% reduction in cur…
A phase-imaging interferometer is used to measure the electron density distribution in the plug region in GAMMA 10. The electron density is derived by the Abel transform technique. We attempt to determine the plasma density distribution for an asymmetric Abel transform by using finite-difference time-domain simulation…
The mixed transition metal dichalcogenide single crystals Mo0.6W0.4Se2 were characterized employing EDAX (Energy Dispersive Analysis of X-ray), (XRD) X-ray diffraction, SEM (Scanning Electron Microscope) and UV-Vis-NIR spectroscopy techniques. The electrical transport properties of as-grown Mo0.6W0.4Se2 single crystal…
The article deals with the details of the thermodynamic test for reactions on the metal or alloy surfaces and provides examples of the balance in the iron-chrome-chlorine system. It has been traced that the thermodynamic balance and chemical reactions parameters depend significantly on the amount of the Gibbs surface…
The synthesis and properties of high luminescent thio-stabilized nanocrystals (NCs) in aqueous media was discussed in this paper. The sharp peaks of photoluminescence ( PL ) and full width at half-maximum (fwhm), were observed in the range of 50 to 70nm. The PH was 9 and the molar ratio of Cd to thiol (1:2.4) was cons…
A feasibility analysis of superconductivity application to measuring external magnetic fields of electrical engineering device (electric machines, transformers and others) is conducted.
Gradient porous NiTi alloys were prepared by powder metallurgy method using NH4HCO3 as space-holder and modified by direct current-pulse anodic oxidation technology in low temperature. Pore characteristic and phase composition of gradient porous NiTi alloys were studied. Microstructure, composition, anti-corrosion and…
The formation of polyurethanes based on vegetable oils is very complex and thus for industrial production of this materials it is important to determine the optimal temperature for polymerisation and finally to obtain materials with the proper mechanical properties. The goal of this work was to assess the kinetic of c…
Magnetization measurements in the temperature range 4.2 K to 300 K were carried out on [Dy(50Å)/Fe(tFe)]20 multilayers grown by dc magnetron sputtering. From the saturation magnetization, it was inferred that the Dy layers are superparamagnetic due to their nanocrystalline nature. Zero field cooled and field cooled ma…
The authors studied the conduction of metal contacts at ambient temperature in normal conditions, while driving piezomechanically molybdenum conductors and controlling conduction between them. Inspite of noise, the authors managed to observe a step-wise rise of contact resistance. The obtained conduction histograms sh…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation S. Assa Aravindh, S. Mathi Jaya, M. C. Valsakumar, C. S Sundar; Compositional variation of magnet…
We have studied the response of stacks of intrinsic Josephson junctions (IJJs) of (Bi1-xPbx)2Sr2CaCu2Oy (x = 0.15) to injection of microwave of frequencies frf of 2-20 GHz at 4.2 K and higher temperatures. Clear constant voltage steps, which are considered Shapiro steps, are successfully observed on the current-voltag…