Materials Literature
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Photo-electrochemical etching with step- gradient illumination intensity was used to generate multi – porosity silicon quantum wire system (Q.W.Si) on n-type silicon wafer. A nano size photonic device of AL/Q.W.Si /si/AL was fabricated to investigate the electrical properties and the surface morphology with the aid of…
Glassfiber core material used as the insulation filler of vacuum insulation panel was successfully fabricated by wet method. The quality of glassfiber suspensions dispersion could affect glassfiber distribution of the core material and the thermal insulation performance of glassfiber vacuum insulation panels. The effe…
Chitin is the most abundant natural amino polysaccharide and is next to cellulose in abundance on the planet. Chitosan is obtained by deacetylation of chitin. Chitosan is being researched by academic and industrial scientists as an underutilized resource and as a new functional material of high potential in various fi…
Терагерцовая фотопроводимость Рё нетривиальные локальные электронные состояния РІ легированных полупроводниках РЅР° РѕСЃРЅРѕРІРµ теллурида свинца, Р СЏР±РѕРІР° Р›.Р
Melt fragmentation, quenching and long term coolability in a deep pool of water under reactor vessel are employed as a severe accident mitigation strategy in several designs of light water reactors. Success of the strategy is contingent upon effectiveness of natural circulation in removing the decay heat generated by…
In this experiment, red sandstone specimens, having slenderness ratios of 0.5, 0.7, 0.9 and 1.1 respectively, were subjected to blow tests using a Split Hopkinson Pressure Bar(SHPB) system at a pressure of 0.4 atmospheres. In this paper, we have analyzed the effect of slenderness ratio on the mechanical properties and…
In the present paper, the kinematic equation of a monolayer graphene is proposed based on a plate theory, and the nonlinear elasticity stress-strain relations are obtained from experiments. The equation includes cubic and quintic nonlinearities. The bending produced when subjected to a concentrated force at the center…
The three-dimensional mathematical model for a three-phase flow during its horizontai solidification is studied using fluid dynamics method based on Eulerian-Eulerian and volume of fraction methods, in which the mass, momentum, species, and enthalpy conservation equations of the Fe-Pb alloy solidification process are…
We use Monte Carlo simulations to study polymer melts consisting of fully flexible and moderately stiff chains in the bond fluctuation model at a volume fraction 0.5. In order to reduce the local density fluctuations, we test a pre-packing process for the preparation of the initial configurations of the polymer melts,…
We report on the influence of low gamma irradiation (10(4) Gy) on the noise properties of individual carbon nanotube (CNT) field-effect transistors (FETs) with different gate configurations and two different dielectric layers, SiO2 and Al2O3. Before treatment, strong generation-recombination (GR) noise components are…
The results from direct and indirect determinations of the magnetocaloric parameters of Mn0.99Co0.01As have been analyzed. The isothermal entropy change (ΔST) due to external magnetic field changes has been determined through direct measurements of the heat absorbed by the sample when the field is removed under isothe…
E. I. IONETE S. M. IORDACHE, A.-M. IORDACHE, R. E. IONETE, A. SALCEANU,C. NICHITA, B. DOBRICA, I. STAMATIN National R&D Institute for Cryogenics and Isotopic Technologies – ICIT Rm.Valcea,4 Uzinei Str.RM Valcea, 240050, Valcea Romania University of Bucharest. Faculty of Physics,3Nano-SAE Research Center, P.O. Box MG-3…
In this study, silver nanoparticles were synthesized by using of camomile plant extract as a reducing agent for AgNO3. The effects of different solvents including water, ethanol, normal hexane and dimethylsulphoxide (DMSO) on the extraction were investigated and the role of anionic (SDS), cationic (CTAB) as well as no…
Investigating the dendritic competitive growth mechanism is of great importance for directional solidification, and the numerical simulation technique is regarded as an effective approach to a description of microstructural evolution. Therefore, a modified cellular automaton model with decentered square algorithm is d…
Molybdenum disulphide (MoS2), a layered quasi-two dimensional (2D) chalcogenide material, is a subject of intense research because of its electronic, optical, mechanical and physicochemical properties. Since the monolayer MoS2 is a direct-gap seminconductor, it is widely used in the field of light-emitting area. Howev…
補修・補強工事において，既設部材側にブラスト処理が困難な場合を想定して，2種ケレンによる鋼材粗面と無機ジンクリッチペイント面の組合せを対象に，高力ボルト摩擦接合継手供試体を用いてすべり耐力試験を実施し，無機ジンク膜厚と2種ケレン面の表面粗さがすべり係数に与える影響を明らかにした．その結果，すべり係数は無機ジンク膜厚より表面粗さに強い相関があることが見られた．また，連結板に塗布した無機ジンク膜厚以上の表面粗さを有してもすべり係数に改善は見られず，すべり係数は頭打ちすることが分かった．試験結果を踏まえ，連結板の無機ジンク膜厚を50μm以上150μm以下確保した上で，鋼材粗面の表面粗さが算術平均粗さRa≧5μmの場合のすべり係数は0.4…
Empty fruit bunches and wastepaper together with urea formaldehyde (UF) were evaluated to figure out potential applications in engineering field. The purpose of this project is to determine the mechanical properties of a new high density board. This composite was manufactured by hot-press technique with 3 different ra…
Indium (In) doped CdS thin films has been prepared by co-sputtering of CdS and In target on glass substrates at 300 °C for a window layer of solar cells. UV-Vis, and Hall Effect measurements were performed to characterize the growth and doping impact of In in the CdS thin films. The experimental results show that the…
Both the ultrafine-grained (UFG) structure with a grain size (d) less than 1 mm and nanocrystalline (NC) structure (d £ 100 нм) can be processed in nickel-based alloy 58Ni-Cr-Mo-B-Al-Cu using methods severe plastic deformation, in particular, multistep isothermal forging within the temperature range of…
Effects of equal-channel angular pressing (ECAP) at 325°C to a strain, e~10 and post-ECAP annealing for 1 hr in the temperature range of 350-520 <sup>o</sup>C on structure of the cast and homogenized Al-Mg-Sc-Zr alloy 01570C were analyzed. It is found that annealing of ECAP processed material containing near homogeneo…