Materials Literature
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In order to discuss quantitatively the effect of functional groups of activated carbon fibers (ACFs) on electric double layer characteristics, ACFs with various amounts of functional groups were prepared from the same ACF by redox methods. The amount of functional groups of ACFs was compared between the method by back…
High-temperature creep resistance in cations co-doped polycrystalline Al2O3 was examined by uniaxial compression creep test at 1250°C. The dopant oxides used in this study were 0.1 mol% of YO1.5, ZrO2, SrO, MgO and TiO2. The creep rate in Al2O3 was significantly changed by cations co-doping. For instance, Zr/Y co-dopi…
The cavitation behavior in room-temperature deformation was investigated for Zn-22 mass%Al alloy by metallographical observations, and compared with that in high-temperature deformation. It was predicted from metallographical observation that the critical cavity radius of transition in growth mechanism from diffusion-…
Microstructural and textural evolution by continuous cyclic bending (CCB) and annealing in a high purity titanium sheet has been investigated. The hardness distribution through thickness in the CCBent sheet exhibits V-shape with marked difference between the surface and the inside. More deformation twins are observed…
Compression tests were performed at different temperatures in an 82.5%Cu-13.5%Al-4.0%Ni (mass %) single crystal, a composition giving the β′ (18R) thermally induced martensitic phase. In all cases, the non-twinned γ′ (2H) martensite was obtained after compression, so, the β′ → γ′ or β → γ′ martensitic transformations…
Abstract This paper is focused on the use of the Polarization‐Modulation Infrared Reflection‐Absorption Spectroscopy (PM‐IRRAS) for studying thin polymer films at interfaces. When forming a polymer film on a metallic substrate, for instance by spin‐coating, the characterization of the polymeric layer becomes very diff…
The synthesis and characterization of photoluminescent crosslinking agents containing a fluorene core are described. They exhibit an efficient fluorescence and have a promesogenic molecular shape that depending on the substitution results in the development of thermotropic mesophases. A difunctionalized fluorene deriv…
This study was carried out to develop the flux and filler metals that enabled brazing a magnesium alloy plate of AZ31B at the temperature lower than 490°C. The following results were obtained in this study. The newly developed flux that consisted of CaCl2, LiCl and NaCl containing Ca ion and Li ion could successfully…
Acetylene (C2H2) plasma immersion ion implantation-deposition (PIII-D) is conducted on polyethylene terephthalate (PET) to improve its blood compatibility. The structural and physicochemical properties of the modified surface are characterized by, Raman spectroscopy, x-ray photoelectron spectroscopy (XPS), and static…
The effect of mercerization on the cellulose solution was investigated in terms of rheological and dilute solution properties in 8 wt % LiCl/N,N-dimethylacetamide (DMAc). Cotton lint, cotton linter, and dissolving pulp were used for native cellulose samples. Static light scattering (SLS) measurements show that the sec…
This work investigates the leakage and breakdown mechanisms in copper (Cu) comb capacitors with carbon-doped low- k plasma-enhanced chemical vapor deposited organosilicate glass (OSG; as the intermetal dielectric and an α-SiCN bilayer-structured dielectric film as the Cu-cap barrier. The leakage mechanism between Cu l…
Methods for the storage and supply of pure H2 are proposed based on the reduction of iron oxide with H2 (Fe3O4 + 4H2→3Fe + 4H2O) followed by the oxidation of the iron metal with H2O (3Fe + 4H2O→Fe3O4 + 4H2). In addition, production of pure H2 from CH4 is proposed based on the reduction of iron oxides with CH4 (Fe3O4 +…
A mutant of Bombyx mori has wings with few scales and is named scaleless. We investigated the morphology of this mutant and found that it had many fewer wing scales than the corresponding wild type (WT) silkworm and that the remaining scales were smaller in shape with fewer furcations. Reciprocal transplantation of wi…
Solid oxide fuel cell (SOFC) has been extensively developed in many countries as an ultra-high efficient energy converter. Such high temperature fuel cell can be operated as a hybrid system of integrating of turbo machinery. A major decision is whether to place the cell stack in pressurized or unpressurized section. T…
炭酸カルシウム（カルサイト）結晶表面上への2価重金属イオンM2＋（Co2＋，Cu2＋，Zn2＋，Cd2＋，Pb2＋）の吸着挙動を25.0℃ で調べた．カルサイトで飽和した溶液から，重金属イオンをカルサイトへ吸着させ，溶液内の金属イオン濃度（CM）及び結晶上の濃度（CM,S）を誘導結合プラズマ質量分析法により測定した．Co2＋，Zn2＋，Cd2＋及びPb2＋の分配比（D＝CM,S/CM）はpHにのみ依存し，pHに対するlog Dのプロットの傾きは2もしくは1～2であった．溶液内における金属イオンのヒドロキソ錯体の生成を考慮した解析により，無電荷のM(OH)2が吸着化学種であることが分かった．一方，Cu2＋の分配比はpHに依存せず，カ…
Intermetallics evolution in a commercial 6082 aluminium alloy severely deformed by Equal Channel Angular Pressing was investigated. Chemical electron probe microanalyses allowed to state that in the severely deformed alloy, Si-rich phases were progressively dissolved whereas the amount and composition of the Fe-Mn-Si…
Electro-oxidative polymerized poly(tris(thienylphenyl)amine)s, which have the hyperbranched (dendritic) structure (PTPA) and linear type (PMeTPA), were investigated for their electrical and magnetic properties. The conductivity PTPA showed was almost one order higher than that of PMeTPA. From the solid state ESR measu…
Melting and crystallization behavior of poly(ethylene oxide) (PEO) with different molecular weight was investigated by modulated‐temperature differential scanning calorimetry (MT‐DSC)—step‐scan alternating DSC. It was found that by separating the reversing and nonreversing components of the (total) heat flow, PEO 1000…
The 70TiO2•30P2O5 (mol%) glass was prepared by the sol-gel method. Its structure was examined by means of IR, Raman spectroscopy and X-ray radial distribution function analysis, and was compared with the corresponding melt-derived glass. It was found that average coordination number of Ti4+ ions was almost 6 and Ti4+…
This paper describes a new method to precipitate the precursor of porous alumina particles by using a porous organic matrix as the template and an enzyme as the precipitant supplier. In this work, the precursor of alumina was precipitated in urease-containing alginate gel spheres dispersed in aqueous solutions contain…