Materials Literature
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加速試験法検討の一環としてBWR一次冷却水系での応力腐食割れ発生挙動に及ぼす硫酸塩の影響を調べるために，288℃の硫酸ナトリウム水溶液中で鋭敏化304ステンレス鋼試験片のすきま付き曲げ試験（CBB試験）を行った．30～500 ppbのSO42−添加は，深さ1 μm以上の全き裂発生数，および深さ50 μm以上の進展性き裂発生数の両者を増加させた．SO42−濃度100 ppb以下では，他の多くの観測例と同様，応力腐食き裂発生の空間分布がPoisson分布に適合したが，300 ppb以上では不適合であった．き裂発生の累積確率の新たな推定方法としてPoisson分布近似法が提示され，その有効性が確認された．Poisson確率過程モデルに基…
In recent years, environmental issues such as global warming and the energy resource depletion have become serious matters. Waste heat recovery can be one of the key technologies to solve these issues. Thermoelectric generator (TEG) is one of the promising technologies expected to play an important role for steel plan…
During the multipass hot processing of alloy steel, restoration processes such as static and dynamic recrystallization and recovery occur. Owing to these phenomena, ow stress characteristics are affected by various deformation conditions, such as temperature and accumulated strain. The objective of this research is to…
The 2017 Faraday Discussion on Complex Molecular Surfaces and Interfaces brought together theoreticians and experimentalists from both physical and chemical backgrounds to discuss the relevant applied and fundamental research topics within the broader field of chemical surface analysis and characterization. Main discu…
分别以普通纯水泥混凝土和高强纯水泥混凝土为对照组，在不改变蒸养制度的前提下，通过降低水胶比来提高掺磷渣的蒸养混凝土的拆模强度，并探究其后期抗压强度发展规律及抗氯离子渗透性。研究表明，在不改变水胶比时，掺入磷渣会显著降低蒸养混凝土的拆模强度；适当降低水胶比后，掺磷渣的蒸养混凝土的拆模强度接近甚至超过对照组，且后期具有较高的抗压强度增长速率和抗氯离子渗透性。 The ordinary plain concrete and high strength plain concrete were set as control samples. Decreasing water to binder ratio (W/B) was used to…
医用胶原蛋白大分子材料经酸水解后，采用异硫氰酸苯酯衍生，经反相液相色谱分离，使用紫外检测器检测，根据保留时间定性峰面积比较进行定量。医用胶原蛋白大分子材料中测出18种氨基酸，总含量为93.25%。 Medical collagen macromolecular material is hydrolyzed. Phenyl isothiocyanate was used. It was separated by HPLC and tested by ultraviolet detector. According to the retention time qualitative peak area comparison is qua…
Calcium phosphate (CaP) is a type of bioceramic material that is biocompatible and bioactive. It is usually used for bone implant application but it lacks mechanical strength. Therefore, sodium alginate (SA), a natural polymer, is combined with CaP to improve its properties of the CaP via precipitation method. The pow…
\n\tOn the basis of total internal reflection edge illumination, a method can be used to identify the damage on front or rear surface of the thin DKDP crystal by the birefringence of DKDP crystal. When an ultraviolet ray incidented upon a DKDP crystal whose thickness was 11 mm, a displacement of 254.738 μm (theoretica…
Slag carry-over during the draining of molten steel from a teeming ladle is numerically studied here. Two-phase isothermal transient 3D Computational Fluid Dynamics simulations were employed to simulate the draining process. Two nozzle diameters, two nozzle positions and three slag heights were considered. From mass b…
Preventing or mitigating the corrosion of reinforcing steel in bridge decks is a major challenge for state transportation agencies. With agency budgets stretched thinner every year, they must implement strategies to extend the service lives of bridges and other critical structures. As such, it is imperative for them t…
The investigation of the shear-induced crystallization of isotactic polypropylene in isothermal conditions in different shear regimes is the aim of the present research. A multiscale framework is developed and implemented to compute the nucleation and growth of spherulites, based on material parameters needed to conne…
We introduce and evaluate, for metasurfaces, parameters such as the intercept factor usually defined for solar concentrators in the realm of ray-optics. The concept provides a path to design highly efficiency metasurface solar concentrators.
A molecular-dynamic study of the atomic mechanisms of the localized nonequilibrium structural state formation in nickel crystallite under a complex deformation scheme is carried out. Compressed and tensile forces were applied to the spaced captures at the boundary of the crystallite, which simulated the effect of inte…
This paper describes the methods of obtaining hydrides of rare earth elements such as dysprosium and neodymium. The properties and corrosion resistance of these elements are investigated. A synthesis method of monophasic dysprosium and neodymium dihydrides is presented. Synthesized dihydrides are agglomerates with an…
身体洗浄剤は泡立てて使用されるため，生活者はその泡立ちを重視し，それが製品の満足感につながっている。泡は発生から消滅にいたるまで，さまざまな物理的バランスによりその形態が変化する。泡沫を形成する液膜中では排液が進み，薄膜化するにつれて起こるゆらぎにより破泡する。本講座では，泡の生成から安定性にかかわるメカニズムを概説したのち，身体洗浄剤に必要とされる泡の特徴を述べる。また，皮膚洗浄剤の使用感にかかわる泡の起泡過程の評価や，泡のキャラクタリゼーションのための方法を紹介する。
Load-controlled fatigue-life of 316L austenitic stainless steel was measured using notched and smooth specimens in two hydrogen conditions: with no added hydrogen and after thermal hydrogen charging to saturate the steel with internal hydrogen. The fatigue-life of the smooth specimens increased after hydrogen charging…
A signal crystal of NaGd(PO3)4 (NGP) was successfully grown with the solid-state reaction method under appropriate synthesis conditions. Structure refinements and the purity of the samples were determined by XRD patterns. It reveals that NaGd(PO3)4 compound crystallizes in the monoclinic system with P 21/n space group…
The main motivation for the lightweight concepts in automotive sector is nation and international legislations to decrease the CO2 emission. The use of lightweight technologies or lightweight materials or the combination of both is indispensable. In this paper we present hot stamping as a solution of using lightweight…
ENR40/ precipitated silica (P-silica) compounds were prepared by in an open two-roll laboratory mixing mill at 5060 . Curing properties and mechanical properties was investigated. In order to reveal the interaction between ENR40 and P-silica, ENR40/P-silica compounds were extracted in toluene to obtain the bonding rub…
The use of mathematical concepts and language aiming to describe and represent the interactions and dynamics of a system is known as a mathematical model. Mathematical modelling finds a huge number of successful applications in a vast amount of science, social and engineering fields, including biology, chemistry, phys…