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en: N-type ion implantation on femtosecond-laser-irradiated diamond surface

en: Applied Physics. A, Materials Science & Processing


en: Improved field electron emission behavior of ultrathin lanthanum hexaboride-coated copper oxide nanowires

en: International Journal of Modern Physics B


en: Boron ion implantation on femtosecond-laser-irradiated diamond surface

en: Japanese Journal of Applied Physics

ja: Japanese Journal of Applied Physics


en: Creep Fracture of Copper Tricrystal along Grain Boundaries

en: The major objective of the present study was to investigate the creep fracture process of a copper tricrystal having 110 -tilt Σ3, 3, 9 grain boundaries. Creep tests at 0.81 TM (TM: melting temperature on the absolute temperature scale) under 4 MPa tensile stress were carried out for three samples prepared from the same tricrystal. Grain-boundary sliding occurred along only the Σ9 boundary, and the triple junction of the boundaries completely suppressed the sliding. The three samples were in different stages of creep deformation. Creep fracture was initiated by sliding-induced voids along the Σ9 boundary. Grain-boundary damage by the void formation developed into complete separation along the Σ9 boundary, and the Σ9 boundary crack induced surface grooves along one of the Σ3 boundaries, arranged almost perpendicular to the tensile axis. The crack propagation resulted in the final fracture of the tricrystal along the Σ9 and Σ3 boundaries. The formation of cavities in the Σ3 fracture surface suggested that the final fracture occurred in a ductile manner after the neighboring grains were partly separated along the Σ3 boundary.

en: Materials Transactions

ja: Materials Transactions


en: Carbon Deposition Assisting the Enhancement of Catalytic Activity with Time-on-Stream in the Dehydrogenation of Isobutane over NiO/Al2O3

en: In the transformation reaction of alkanes to alkenes via catalytic dehydrogenation, it is generally accepted that the so-called catalytic deactivation behavior will occur. This phenomenon causes a drastic reduction in activity with time-on-stream. It is understood that carbon deposition generated during the reaction then covers the surface of the catalyst, and this leads to a drastic decrease in activity. However, contrary to this common wisdom, our laboratory reported that the dehydrogenation of isobutane to isobutene on NiO/γ-Al2O3 within a specific range of NiO loading in the presence of CO2 actually improved the yield of isobutene with time-on-stream. Since few such cases have been reported, in this study, isobutane was dehydrogenated in the presence of CO2 using NiO/α-Al2O3 as the catalyst with 20% NiO loading and improvement was again observed. In order to investigate the cause of the improvement, both NiO/γ-Al2O3 and NiO/α-Al2O3 with 20% NiO loading were examined in detail following the reaction. According to TEM analysis, both catalysts were covered with a large amount of carbon deposition after the reaction, but there was a difference in the types. The carbon deposition on NiO/γ-Al2O3 had a fibrous nature while that on NiO/α-Al2O3 appeared to be a type of nanowire. Raman spectroscopy revealed that the carbonaceous crystal growth properties of two forms differed depending on the support. In particular, a catalytically active species of metallic nickel was formed in a high degree of dispersion in and on the above two forms of carbon deposition during the reaction, and this resulted in high activity even if the catalyst was covered with a carbon deposition.

en: Journal of Chemical Engineering of Japan


en: Microscopic Structure and Binding Mechanism of the Corrosion-Protective Film of Oleylpropanediamine on Copper in Hot Water

en: The Journal of Physical Chemistry C

ja: The Journal of Physical Chemistry C


en: Creep fracture of aluminum and copper tricrystals having <110>-tilt Σ3, 3, 9 grain boundaries


en: Formation of ohmic Ni electrodes on femtosecond laser-modified 4H-SiC surface

ja: Applied Physics. A, Materials Science & Processing


en: Electronic state analysis of Li2RuO3 positive electrode for lithium ion secondary battery

en: Modern Physics Letters. B

ja: Modern Physics Letters. B


en: Local melting of Au/Ni thin films irradiated by femtosecond laser through GaN

en: Applied Physics. A, Materials Science & Processing


en: Grain-Boundary Sliding and its Accommodation at Triple Junctions in Aluminum and Copper Tricrystals


en: Femtosecond-laser-induced modifications on a 4H-SiC surface and their application to low-temperature diffusion at the Ni/SiC interface


en: Application of ultrasonic assisted soldering method to hard-to-solder material

en: International Journal of Modern Physics B


en: Femtosecond-laser-induced modifications on the surface of a single-crystalline diamond

en: Japanese Journal of Applied Physics


en: High temperature degradation mechanism of a red phosphor, CaAlSiN3:Eu for solid-state lighting

en: Journal of Applied Physics

ja: Journal of Applied Physics


en: Visualization of PVDF nanofibers coated on filter paper using fluorescein silica nanoparticles

en: Journal of Applied Polymer Science

ja: Journal of Applied Polymer Science


en: Femtosecond laser-induced modification at aluminum/diamond interface


en: Low-Temperature Diffusion at Ni/SiC Interface with the Aid of Femtosecond Laser-Induced Strain

en: Journal of Laser Micro/Nanoengineering

ja: Journal of Laser Micro/Nanoengineering


en: Preparation of micro-biosensor for continuous glucose monitoring


en: Influence of alkali treatment on internal microstructure and tensile properties of abaca fibers

en: The objective of this study is to investigate the effect of alkali treatment on the internal microstructure and tensile properties of abaca fibers. The abaca fibers were immersed in aqueous solutions of NaOH (5, 10, or 15 wt%) for 30 min, rinsed and dried. The fibers were subsequently characterized by scanning electron microscopy, X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), and tensile strength tests. The lumen is a hollow region in each elementary fiber of the abaca fiber bundles. It was found that the lumen of the abaca fibers completely collapsed after 10 and 15 wt% NaOH treatment, due to swelling of the fibers. The fibers also became twisted after these alkali treatments. It was found that cellulose I in abaca fibers was partially transformed to cellulose II after 15 wt% NaOH treatment, as evidenced by XRD measurements. FT-IR analysis indicated that the alkali treatment led to a gradual removal of binding materials; such as hemicelluloses and lignin, from the abaca fibers, resulting in the separation of abaca fiber bundles into individual elementary fibers. The tensile strength of alkali-treated abaca fibers did not vary with alkali concentration. The Young's modulus of the abaca fibers treated with 5 wt% NaOH solution increased by 41%, whereas those treated with 10 and 15 wt% NaOH solution decreased by 24 and 29%, respectively. A non-linear behavior was observed in the stress strain curves of the abaca fibers after 10 and 15 wt% alkali treatment, which could be attributable to the twisting of the fibers.

ja: アバカ繊維の内部構造と引張特性に及ぼすアルカリ処理の影響について調査した．繊維中のルーメンは10,15wt%NaOHで処理すると消失すると共に繊維がツイストすることを見いだした．アルカリ処理したアバカ繊維の引張強度にはほとんど変化はない．しかし，5wt%NaOHで処理した場合，ヤング率は41%増加するのに対して，10,15wt%NaOHで処理するとそれぞれ24%，29%低下する．10,15wt%NaOHで処理したアバカ繊維は非線形の応力-ひずみ関係になり，この非線形性は繊維のツイスト化によってもたらされると推察される．

en: Industrial Crops and Products

ja: Industrial Crops and Products


en: Bonding mechanism of lead-free solder and glass plate by ultrasonic assisted soldering method

en: Materials & Design (1980-2015)

ja: Materials & Design (1980-2015)


en: Identification of Second Phases for Sr1-xLaxTiO3 Perovskites Synthesized by Citric-Gel Method

en: ECS Transactions

ja: ECS Transactions


en: Orientation of Initial-Stage Recrystallized Grain in Non-Uniformly Deformed Copper Single Crystal

ja: 不均一変形した銅単結晶における初期段階の再結晶粒方位

en:
The objective of the present study was to find the orientation relationship between a recrystallized grain at its initial stage and a deformation microstructure in a non-uniformly deformed copper single crystal.
 A tensile strain of 25% was applied to a <110> copper single crystal sample in which shallow grooves were made at both side faces before the tensile test to promote non-uniform deformation. A thin disc specimen prepared from the deformed sample was annealed in a high vacuum. A scanning electron microscope (SEM)/electron backscatter diffraction (EBSD) method was used to analyze the orientations of deformed and annealed states.
 There are two primary slip planes of the largest Schmid factor in a face-centered-cubic metal single crystal deformed along a <110> direction. In the present copper single crystal sample, both right-up and right-down band-like regions are formed in which either of the primary slips was activated. The arrangement of band-like regions on the overall sample surface was almost symmetrical. Between band-like regions, there were regions of patchy slip appearance, consisting of double-slip and single-slip areas. The band-like regions were rotated so that the slip directions moved towards the tensile axis. On the other hand, the rotation of patchy regions was relatively small.
 In the disc specimen annealed at 833 K, a recrystallized region was formed at the boundary between band-like and patchy regions. The recrystallized region consisted of two types of recrystallized grains having a twin relationship each other. Both types of recrystallized grains had an <111>-rotated orientation relationship with the band-like region.

en: Journal of the Japan Institute Metals

ja: 日本金属学会誌


en: Low-temperature diffusion assisted by femtosecond laser-induced modifications at Ni/SiC interface

en: Applied Physics Express

ja: Applied Physics Express


en: Application of femtosecond laser irradiation to low-temperature diffusion at the Ni/SiC interface