Materials Literature
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シルセスキオキサンは，シリコーンとシリカの中間的な存在として位置づけられ，有機と無機の特長を併せもつ。本稿では，有機ユニットとして架橋性基を導入したシルセスキオキサン誘導体「SQシリーズ」の硬化物の耐熱性を評価した。SQシリーズの分子設計を工夫することで，耐熱衝撃や耐黄変に優れる構造を見いだした。これらの知見を活かして，宇宙機用の耐原子状酸素性コーティングへの適用を検討したところ，既存のコーティングの欠点を克服した画期的なコーティング剤を開発できた。SQシリーズを塗布した材料が宇宙で用いられ，実用化を果たした。
The Working Party on International Nuclear Data Evaluation Co-operation (WPEC) subgroup 29 (SG 29) was established to investigate an issue with the 235U capture cross-section in the energy range from 0.1 to 2.25 keV, due to a possible overestimation of 10% or more. To improve the 235U capture crosssection, a new 235U…
The article presents a new method for measuring the ultrasonic wave attenuation ratio in inhomogeneous material by processing structural noise (SN) realizations taking into account the frequency dependence pattern of ultrasonic wave attenuation ratio, the converter directivity characteristics and their frequency depen…
Objectives Modern building codes prescribe the calculation of building structures taking into account the nonlinearity of deformation. To achieve this goal, the task is to develop a methodology for calculating prestressed reinforced concrete beams, taking into account physical and geometric nonlinearity. Methods The m…
To validate nuclear data and code in the neutronics design of a hybrid reactor with thorium, integral experiments in two kinds of benchmark thorium assemblies with a D-T fusion neutron source have been performed. The one kind of 1D assemblies consists of polyethylene and depleted uranium shells. The other kind of 2D a…
The paper provides the results of alloy development investigation and technology of making compact billets of the Al-Si-Ni-based composite for aerospace equipment components. Composite production included several stages: first, matrix powder was produced by gas atomization and then matrix powder with disperse alloying…
Epoxy coating uses for the corrosion protection of stainless steel. It does not protect metal in presence of corrosive pollutants. Epoxycoated stainless steel surface has possessed lots of porosities so pollutants and particulates materials are entered inside by osmosis and diffusion process. Pollutants like oxides of…
Quenching of lanthanides luminescence of a novel long live Tb(III) -Ethyl 1-Allyl-1,2-Dihydro-4-Hydroxy-2-Oxoquinoline-3-Carboxylate (EADHOC) as a ligand to form a complex with molar ratio 1:3 in solution has been studied in ethanol in presence of organophosphorus pesticides both Di-chlorvos(P1) and paraoxon-Ethyl (P2…
A composite structure consisting of rectilinear thin wires array forming a 2D square lattice within the non-conductive host media was theoretically investigated in this paper. The effective permittivity and permeability of the composite structure were calculated using numerical solution of Maxwell equations in differe…
Fission product yields (FY) are fundamental nuclear data for several applications, including decay heat, shielding, dosimetry, burn-up calculations. To be safe and sustainable, modern and future nuclear systems require accurate knowledge on reactor parameters, with reduced margins of uncertainty. Present nuclear data…
Preliminary neutron capture cross section of 120Sn, 122Sn and 124Sn were obtained in the energy range from 20 meV to 4 keV with the array of germanium detectors in ANNRI at MLF,J-PARC. The results of 120Sn, 122Sn and 124Sn were obtained by normalizing the relative cross sections to the data in JENDL-4.0 at the largest…
Organogelation is a useful and novel alternative to structure vegetable oils without the use of trans and/or saturated fats, providing useful and novel functional properties not only to food systems, but also to cosmetics, and pharmaceutical products. However, the relationship between the molecular structure of gelato…
We investigate unidirectionally surface plasmon polaritons at a flat metal-dielectric interface with a parity-time symmetric modulation on the permittivity of the dielectric medium. We show that the life time and propagation distance of surface plasmon polaritons can be significantly improved.
Korea has developed a Helium Cooled Ceramic Reflector Test Blanket Module (Ko HCCR TBM) related to the ITER project. Tungsten is considered as a prime candidate for the plasma facing materials in fusion reactors, and for the structure material of Ko HCCR TBM. KAERI (Korea Atomic Energy Research Institute) has been eva…
The SAMINT methodology allows coupling of differential and integral data evaluations in a continuous-energy framework. Prior to development of the SAMINT code, integral experimental data such as in the International Criticality Safety Benchmark Experiments Project remained a tool for validation of completed nuclear da…
硫酸基導入率の異なる硫酸化セルロース(CS)をPEDOTのドーパントに用いて，導電性高分子PEDOT/CSの調製を行った．DS値が1.0のCSを用いたPEDOT/CS-2において，最も高い導電性である0.57 S/cmを示し，TEM観察によりセルロースナノクリスタルに由来する構造を確認した．XRD測定により，DS値が高い程，CSの結晶性は低下したが，結晶性の高いCSを用いた場合に導電性が高くなる傾向を示した．PEDOT/PSSおよびPEDOT/CS-2のラマン分光分析の結果，PEDOT/CS-2では，Cα＝Cβ非対称伸縮振動に由来するピークが1566 cm－1から1562 cm－1へシフトして，Cα＝Cβ対称伸縮振動に由来する吸収…
AREVA NC La Hague facility is the first step of the nuclear fuel recycling process implemented in France. The processing of the used fuel is governed by high standards of criticality-safety, and strong expectations on the quality of end-products. From the received used fuel assemblies, the plutonium and the uranium ar…
Nanopores in 10–30 nm thickness Si4N3 membranes were milled using Ga+ ions. Dose dependence of the hole diameter and shape was established and explained as resulting from the intensity distribution of the focused ion beam. The initial diameter of the milled pore is dependent on the full-width half-maximum of the axial…
The tapes are quickly quenched onto a rotating drum. The structure of mechanical and physical properties is studied depending on the spinning parameters. An approach is proposed for the classification of obtained bands based on the statistics of the microrelief of their surfaces.
Методом плазмохимического газофазного осаждения создан сферический распределенный брэгговский отражатель (СРБО) на ближний инфракрасный диапазон спектра. СРБО состоит из чередующихся четвертьволновых слоев аморфного гидрогенизированного карбида кремния (a-Si1-xCx : H) и аморфного оксида кремния (a-SiO2), нанесенных на…