Materials Literature
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To evaluate sample degradation during XPS measurement, a round-robin test involving five laboratories was carried out with four kinds of samples such as cellulose nitrate (NC), polyvinyl chloride (PVC), silicon wafer modified with chloropropyltriethoxysilane (CPTES-Si) and gold substrate modified with 1H, 1H, 2H, 2H-p…
My group has recently been engaged in the following research work on the nanoscale materials by using XPS:
The relationship among the sputtering conditions, composition, microstructure, and magnetic properties of Co-Si-O granular film deposited using various metal-oxide composite targets was investigated. The raw materials of the sintered targets were (a) (Co)-(SiO2), (b) (Co)-(Si)-(Co3O4), and (c) (Co)-(Si)-(CoO) retainin…
It is shown that the peak current in a return stroke is determined by the background electric field that exists between the cloud and the ground. Assuming 150 kV/m as the largest background electric field that can exist below thunderclouds, it is estimated that the largest negative first return stroke peak current tha…
Type 316L stainless steel (SS) (UNS S31600) pipeline carrying seawater suffered pitting and leakage within a few years of installation. Visual examination revealed penetrations and shallow pits. Electron probe microanalysis results indicated a decrease in chromium concentration within the pit and in the iron concentra…
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KAPTON films with and without adding small amounts of metallic compounds (0.1～2 at% as metal) were carbonized at 800～1200℃ for 1 h in nitrogen and capacitance was measured in sulfate solutions by cyclic voltammetry. Nitrogen containing carbons derived from the film without additives had low specific surface area (SBET…
This chapter describes accelerated aging studies of a plasticized commercial poly(ester urethane) (Estane® 5703). Oxidative and hydrolytic degradation mechanisms were investigated based on environmental conditions. Both studies evaluate degradation by 1 H NMR and GPC molecular weight analysis. The oxidative degradatio…
Presented are experiment results of the Large Scale Test Facility (LSTF) conducted at the Japan Atomic Energy Agency (JAEA) with a focus on core exit thermocouple (CET) performance to detect core overheat during a vessel top break loss-of-coolant accident (LOCA) simulation experiment. The CET temperatures are used to…
Neural prosthetics capable of recording or stimulating neuronal activity may restore function for patients with motor and sensory deficits resulting from injury or degenerative disease. However, overcoming inconsistent recording quality and stability in chronic applications remains a significant challenge. A likely re…
We prepared fine bulk samples of Hf hydrides with various hydrogen contents, viz., the H/Hf ranges from 1.62 to 1.72. It was confirmed that all the Hf hydrides prepared in the present study exhibited a cubic delta phase with the fluorite-type structure. In the temperature range from room temperature to around 650 K, w…
Within the framework of a Coordinated Research Project on Evaluation of High Temperature Gas-Cooled Reactor Performance (CRP-5) initiated by the International Atomic Energy Agency (IAEA), the calculation of steady-state temperature distribution of the 10MW High Temperature Gas-Cooled Reactor-Test Module (HTR-10) under…
Rectangular hollow sections (RHS) are widely used in loadcarrying structures due to their good load transfer behavior and aesthetic form. During fabrication of a cold-formed rectangular hollow section (CFRHS), the concave inside corner surfaces experience significant compressive plastic strains. The resulting tensile…
The rubber products degrade during use by various factors such as oxygen, ozone, heat, light and dynamic fatigue. Degradation factors are various depending on the conditions of use, and there are a lot of degradation factors besides the above-mentioned. The reagents that are added to prevent degradation are called ant…
The practical strength of line pipe steel has extended to X80 or greater. The line pipes of X80 grade have been commercialized successfully and now the development and evaluation of X100 and X120 grade line pipes are conducting.The effect of boron addition on the toughness and microstructure of seam weld metal was inv…
As fundamental importance to SEM observation of specimen surface, secondary electron generation and emission processes have been studied by a Monte Carlo method. The simulation is based on a discrete description of cascade secondary electron production. The Monte Carlo model combines the use of Mott’s cross section fo…
Westinghouse Electric Co and its partner The Shaw Group Inc's Power Group have signed an Engineering, Procurement and Construction contract (EPC) with Progress Energy Florida to provide two Westinghouse AP1000 nuclear power units at its Levy County, Florida site in the US.
Prevalence of Collagen. Collagen is the most abundant protein in modern animals, including humans.1,2 The natural selection of collagen as an anatomical scaffold was made long ago. Collagen has been isolated from soft tissue in the fossilized bones of a 68-million-year-old Tyrannosaurus rex and a half-million-year-old…
Nd-Fe-B/Ta multilayered permanent-magnet thin films that were perpendicularly anisotropic were prepared by magnetron sputtering, and their thermal stability was estimated in terms of the irreversible flux loss after a heat cycle. In the multilayered films, an Nd2Fe14B phase crystallized, and its grain size was success…
ABSTRACT. In the present paper, we investigate several inclusion relationships and other interesting properties of certain subclasses of meromorphically multivalent functions which are defined here by means of a linear operator involving the generalized hypergeometric function. Some interesting applications on Hadamar…