Materials Literature
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We investigated the MgO layer thickness dependences of the structure and magnetic properties of L 1 0 -FePt/MgO/GaAs structures. To examine how the crystallinity and growth morphology of the MgO layer affect the L 1 0 -FePt layer, two kinds of preparation method were employed for MgO deposition: electron beam (EB) eva…
Borondipyrromethenes(BODIPY)are a class of fluorescent dyes whose fluorescence quantum yields are generally high and independent of the solvent.In this paper,we report the synthesis of a new type of BODIPY compound that carries an azido group on the 3-position of the pyrrole core.The azido group quenches the fluoresce…
We performed first-principles configuration–interaction calculations of multiplet energies for Mn 4+ in K 2 SiF 6 , K 2 GeF 6 , and K 2 TiF 6 crystals. The results indicate that corrections based on a single-electron calculation are effective for the prediction of 4 A 2 → 4 T 2 and 4 A 2 → 4 T 1a transition energies,…
In this paper, a method of intensive quenching in water salt solutions, known as the IQ-2 process, is considered. To realize the IQ-2 process, water salt solutions were used, including with NaNO3, Na2CO3, NaCl, CaCl2, MgCl2, Ca(OH)2, and others salts. It is shown that the effectiveness of intensive quenching can be im…
Organic phosphorescent nanoparticles, which have a host–guest-type structure and show photosensitized phosphorescence, were successfully prepared by a reprecipitation method. Concentration quenching, which is disadvantage for organic nanophosphors, was efficiently suppressed with a host–guest-type structure widely use…
A fine structure with a ruthenium-lined barrier layer was experimentally fabricated, and copper-filling tests were performed by high-vacuum sputtering using argon gas with added oxygen. As a result, the complete copper filling of all trenches with a width of about 80 nm and an aspect ratio (AR) of four was accomplishe…
Abstract The damage and fragmentation of rock induced by impact loading is one of typical nonlinear problems in underground engineering. Rock specimen such as rock plate was found to become invalid under impact loading. This paper presents brittle fragmentation for dynamic damage of rock plate based on the edge-on imp…
Penelitian ini bertujuan Untuk mengetahui nilai kekerasan Vickers material Baja EMS-45 sebelum proses pengelasan dan setelah dilakukan proses pengelasan tanpa post weld heat treatment annealing, Untuk mengetahui berapakah suhu optimal post weld heat treatment annealing untuk material baja EMS-45 dengan variasi suhu ya…
Abstract not provided.
AlxTi1-xN/CrN multilayer coatings were fabricated by magnetron sputtering and those hardness variations were studied by observing the crack propagation and measuring the chemical bonding state of nitrides by Ti addition. While AlN/CrN multilayer shown stair-like crack propagation, AlxTi1-xN/CrN multilayer illustrated…
The morphological evolution of a-GaN deposited by metalorganic chemical vapor deposition (MOCVD) on r-sapphire is studied. The influences of V/III ratio and growth temperature on surface morphology are investigated. V-pits and stripes are observed on the surface of a-GaN grown at 1050°C and 1100°C, respectively. The o…
SiC ceramics is very promising to be widely applied due to the excellent physical and chemical properties.However, the very difficult process of SiC ceramics hinders its application. In this paper, the nano-cutting of SiC ceramics is simulated based on molecular dynamics. The influences of the tool rake and cutting de…
X-Ray Analysis on Ceramic Materials Deposited by Sputtering and Reactive Sputtering for Sensing Applications
루타일(rutile) $TiO_2$ 분말의 알칼리 수열합성과 $300{\sim}500^{\circ}C$ 열처리를 통해 $TiO_2$ 나노튜브를 제조하고, 이를 리튬이 차전지의 음극 활물질로 채택하여 그 물성과 전기화학적 특성을 조사하였다. 수열반응 직후의 정제과정에서 불순물인 미세분진을 완전히 제거하여 제조된 $TiO_2$ 나노튜브는 고비표면적과 확연한 나노튜브 결정상을 보였다. 또한 열처리 온도가 증가함에 따라 등방적으로 분산된 나노튜브들이 서로 응집되어 비표면적의 감소를 초래하였다. $300^{\circ}C$ 열처리한 $TiO_2$ 나노튜브가 250 mAh $g…
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The effect of electronic switching of the conductivity by a magnetic field lower than 500 mT has been implemented in the spin-valve structure in the “current perpendicular to plane” geometry with a transport layer of a wide-band-gap polymer to 1200 nm thick. The problem of spin transfer through the polymer layer has b…
Kurzfassung Kurze Wärmebehandlungszyklen sind typisch für viele Fertigungsprozesse wie Randschichthärten und Schweißen. Diese Bedingungen sind durch schnelle Temperaturänderungen und große lokale Unterschiede im Temperaturverlauf gekennzeichnet. Um den Zusammenhang zwischen Härte und Zähigkeit unter derartigen Bedingu…
Carbon films with high conductivity anisotropy were obtained via sputtering a graphite target with an accelerated argon ion beam. The film structure was studied using Raman spectroscopy (combination scattering spectroscopy), transmission high-resolution electron microscopy, chemical analysis, X-ray photoelectron spect…
For improving the damage effect to underwater target of warhead, a kind of metamorphic tapered angle shaped charge is designed, and the damge mechanism is analyzed. The physics modle of tapered and spherical shaped charge under underwater explosion is built, numerical simulation is done by LS-DYNA, the stress distribu…
This paper presents a 3D FEM computation model for a power transformer structure, where several conductor disks in series are used to constitute each winding, this is different from the normal cylindrical shape models. Base on such model the simulated ohmic losses in windings can be the same as that of measured. Then…