Materials Literature
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Equipment of a thermal power plant is subjected to high temperature oxidation and wear. This raises operating costs through frequent repair of worn parts and high metal consumption. The paper proposes a possible solution to this problem through arc spraying of protective coatings. Cored wires of the Fe-Cr-C basic allo…
The prevention of sensitization by delta-ferrite in austenitic stainless steel weld metal was investigated from a point of view of the required fraction of delta-ferrite to prevent in weld metal containing not low carbon. Intergranular corrosion test in copper-copper sulfate solution was conducted using the 20%Cr-11/1…
Friction is a complex dynamic process. Direct observation of processes occurring in the friction zone is impossible due to a small size of a real contact area and, as a consequence, requires various additional methods applicable to monitor a tribological contact state. One of such methods consists in the analysis of a…
Higher superconducting transition temperature Tc is achieved in longer Cu-Cu bond distance samples. In this study, indium-based cuprate compounds with long Cu-Cu bond distance were prepared via solid-state reaction. The parent compound InBa2CuO4.44 is not electrically conducting due to the lack of oxygen ions in the C…
Abstract
Atomistic simulations of the central crack growth process in an infinite plane medium under mixed-mode loading using Large-Scale Atomic/Molecular Massively Parallel Simulator (LAMMPS), a classical molecular dynamics code, are performed. The inter-atomic potential used in this investigation is the Embedded Atom Method…
This paper evaluates the effect of preliminary explosive processing of high-tensile steel on the martensite reaction and structure formation in repeated thermal hardening or in a welding thermal cycle. It is found that dislocation structures formed in hardened low-alloy steel 14Cr2MnMoB in a plane wave mode of explosi…
The influence of consecutive dynamic and gigacycle fatigue loads on the lifetime of aluminum-magnesium alloy AlMg6 (5083) has been studied to analyze the fracture surface morphology (roughness scaling) and generalized fatigue crack kinetics, taking into account the correlated behavior of defects at the crack tip area…
The polyvinylchloride (PVC) is an extensively used thermoplastic material, therefore the research were focused on this polymer. The aim of this work was to determinate the current development of nanocomposite materials based the polyvinylchloride and the influence of filler loading on their thermal and electrical prop…
In recent years, natural fabric thermoplastic composites such as flax have received much attention due to its attractive capabilities for structural applications. It is crucial to study the processing of flax fabric materials in order to achieve good quality and cost-effectiveness in fibre reinforced composites. Thoug…
熱電発電が抱える二つの課題である、低い変換効率と毒性・希少元素の含有を解決するために、国内外の研究機関と共同して、前者についてはナノテクノロジーを、後者は元素代替を用いて解決を試みている。脚光の当たりやすい材料開発のみならず、泥臭いモジュール開発等にも精力的に取り組み、熱電発電の高効率化、低毒性化、低コスト化に道筋をつけた。さらに、熱電発電の市場開拓に積極的に関与するために、これら研究成果をもとにベンチャー企業を設立した。この論文では、基礎研究から起業までの各ターニングポイントで、著者がとった研究戦略について議論する。
摘要：
Activated carbon materials (CM) were prepared from rice husk carbonized in a fluidized bed reactor. Low temperature nitrogen adsorption at 77 K was used for characterizing the EM texture. Variations in the preparation conditions (carbonization followed by activation) allowed the materials to be synthesized with the BE…
Investigating the dynamics beyond the patterns (structure, diversity) of microbial \ncommunities at regional level in different spatial scales has been a developing area \nin ecology and studies on diatoms with such approach receive increasing scientific \ninterest. In this study, phytobenthos samples were collected f…
The paper presents the experimental data observed in the microstructure and phase composition of ultrafine-grained Ti–40 mass % Nb (Ti40Nb) alloy after high-temperature annealings. The ultrafine-grained Ti40Nb alloy is produced by severe plastic deformation (SPD). This method includes multiple abc-pressing and multi-p…
This paper proposes a modeling method of the temperature characteristics of Preisach theory. On the basis of the classical Preisach hysteresis model, the Curie temperature, the critical exponent and the ambient temperature are introduced after which the effect of temperature on the magnetic properties of ferromagnetic…
The thin film of Sb2Se3 was deposited by thermal evaporation method and the film was annealed in N2 flow in a three zone furnace at a temperature of 290oC for 30 min. The structural properties were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and…
The advancement of nanotechnology has enabled the miniaturization of electronic components to the extent of several nanometres, thus leading to heat dissipation issues which often result in device failure. This thesis involves a fundamental study on phonon and electron transport in semiconductor materials commonly use…
The cost optimisation of 1‐GW offshore wind farms is investigated in this study. The feasibility of combining AC collector platforms and an HVDC converter platform to form a combined platform is assessed. The evaluation of different electrical connection topologies is undertaken for a wide range of different electrica…
We provide design and fabrication of robust GMR devices operating in the 3–15 µm spectral range. Optimized reflectors are designed with inverse numerical methods. Preliminary experimental spectra agree qualitatively with theory.