Materials Literature
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Since the first Korean nuclear power plant (NPP), Kori 1, commenced operation in 1978, a total of 21 NPPs had been put into operation in Korea by the end of 2011. Radiation doses of NPP workers have been periodically evaluated and controlled within the prescribed dose limit. Radiation dose assessment is carried out mo…
The reconstruction and electronic structures of the interfaces between single wall carbon nanotubes and ferromagnetic Co electrodes were studied in the framework of density functional theory. The obtained results revealed that there is a strong interaction between carbon nanotubes and Co electrodes. At the interface r…
This approach combines the gauge field theory of spin-glasses [1, 2, 3, 4] with the critical dynamics methods in order to describe the glass transition. The glass transition is regarded as a phase transition, which is interrupted because of premature critical slowing down, caused by the frustrations. The frustrations…
Plasma nitriding technology was carried out on the surface of bearing steels. The phase composition and microhardness of the nitrided layer were analyzed. Sliding wear characteristics of the nitriding steel were studied on an Optimol SRV IV oscillating friction and wear tester at room temperature. The fretting wear me…
At present, most studies on magnesium alloy sheet forming were carried under hydraulic press. In this paper, differential temperature forming of AZ31B magnesium alloy sheet under the J23-63 mechanical press were carried out. Through an orthogonal test about studying the influence of process parameters on AZ31B magnesi…
Electron beam melting (EBM) method is one of the free-form fabrication techniques that enable near-net-shape manufacturing of complex three-dimensional, porous, and graded products, and is expected to facilitate the development of new methods for manufacturing biomaterials that could be used for hard-tissue substitute…
Abstract The new title compound is obtained from aqueous solutions containing Cs2SO4, Ag2SO4, and Ba(MnO4)2 in different ratios.
The calculation of elastic modulus of carbon nanotubes is an essential prerequisite for future Micro-nano devices fabrication that based on carbon nanotubes. The interaction potential of C-C covalent bond in single-walled carbon nanotubes (SWCNTs) is described by Terrsoff-Brenner potential in this paper. The elastic m…
Calcium phosphates films were deposited onto pipes and stents of nitinol alloys by an electrolytic deposition (ELD) method. Monocalcium phosphate (Ca (H2PO4)2·H2O) solutions were used as the electrolyte, and electric depositions were carried out at the constant cathode current of 1.59 mA/cm2 at 65°C for 60 min. From t…
In order to obtain high power semiconductor lasers with narrow far-field and improve the characteristics of the output beam, a broad-stripe distributed feedback semiconductor laser with second-order metal surface gratings emitting around 940 nm is fabricated, based on the holographic photolithography and wet etching t…
mplants made of titanium and its alloys are widely used in dental and orthopedic fields due to their excellent chemical stability and mechanical properties. However, due to the bio-inert properties of titanium and its alloys, it is difficult to achieve a chemical bond with bone tissue and to form a new bond on the sur…
The crystallization in the MX – CuX2 – H2O system (M+ = K, NH4, Rb, Cs; X- = Cl, Br) was studied and 2MX.CuX2.2H2O was found to be the predominant type of double salts. All of them are isostructural (tetragonal crystal system, sp. gr. P42/mnm) and the structure consists of discrete [Me(H2O)2X4] octahedra and separate…
The purpose of this work is to study the effect of testing method on the tensile properties index of p-Phenylene terephthalamid (PPTA) fibers. Three different brand fibers were employed, namely Kevlar 129, Twaron and Heracon. The results indicate that tensile strength index is strongly affected by gauge and twist coef…
WS2 soft coatings were deposited by medium-frequency magnetron sputtering, multi-arc ion plating and ion beam assisted deposition technique on the YT15 cemented carbide substrates. The influence of the substrate bias voltage on the coating properties has been studied. The coatings exhibited a dense and fine grained st…
The superconducting and magnetic states coexistence in the FS superlattice, where F is ferromagnetic metal and S is superconductor, is investigated on base of microscopically derived boundary value problem for the Eilenberger function. The asymmetrical four-layered structure FSF' S' is considered as elementary cell. T…
We synthesized polyimide (based on ODA-PMDA) and polyimide foam and polyimide/clay foam that pore size was uniform about 1㎛. We identified that the clay layers are well dispersed in polyimide matrix and achieved exfoliation structure by X-ray diffraction. And we compared thermal conductivity of PI, PI foam, PI/clay fo…
The microwave permeability of glass-coated magnetic alloy microwires / dielectric composite was investigated by apparent permeability linked with intrinsic permeability calculated based on Landau-Lifshitz function. The effect of diameter, length and microwires content on the composite effective permeability was simula…
Subscript textIn this paper the influence of glass beads (GB), Fluorescent Brightener (FB), titanium dioxide (TiO2) on light reflecting performance of PET was studied. The composites of PET, GB, FB, and TiO2 were prepared by twin screw extruder. The dispersive characterization of GB with diameter of 20μm to 90μm was o…
Feasibility of starfish bone to be a source material for apatite bone substitute was investigated in the present study because starfish bone is known to be porous calcium carbonate. Starfish bone was assembly of Mg containing calcite granules. And the calcite granules had fully interconnected porous structure with app…
In this paper, we introduced dbcube topology for Network-on Chips(NoC). We predicted the dbcube topology has high power and low latency comparing to other topologies, and in particular mesh topology. By using xmulator simulator,we compared power and latency of this topologyto mesh topology. Finally, it is demonstrated…