Materials Literature
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The behavior in competitive adsorption-desorption reactions of Cu and Zn was studied in four calcareous soils. Cu and Zn were added to the soil by Cu, Zn, and Cu+Zn sulfate solutions in a CaSO4 background. Soil sorption of these cations was described by equilibrium isotherms that fitted either Freundlich- or Langmuir…
An analysis is made of the diffraction reflection of light in a cholesteric liquid crystal in the presence of magnetooptic activity which leads to wave irreversibility and in particular to nonidentical forward and return wavelengths. It is shown that in this particular case, the Bragg formula containing a single wavel…
The motions of top and bottom dross in a continuous hot dip plating bath were investigated using a transparent cold model vessel with a reduced scale of one-tenth. The flow field in the model bath was classified into three regions as usual; the entry region, the exit region, and the region enclosed with a belt. This b…
New fibers are categorized as: (1) high-performance fiber, (2) high-function fiber, and (3) high-touch fiber. Products appearing in the Japanese market are introduced with the technical background. High-performance fiber denotes fiber that possesses higher mechanical strength, better heat resistance, better acid/alkal…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation W. Richards Thissell, Anna K. Zurek, Davis L. Tonks, Robert S. Hixson; Experimental quantitative…
To see the bundle effects on the electronic and the vibrational properties of single-wall carbon nanotubes (SWNTs), we have measured the resonance Raman scattering of isolated SWNTs and thick bundles. For the measurements of the isolated SWNTs, we used an evacuated sample after bromine doping. A broad and asymmetric t…
This research paper was developed aiming at evaluating the feasibility of using Eucalyptus maculata, E. grandis and E. tereticornis woods, derived from saw mill processing residues to particleboard manufacture. Was manufactured 24 boards, being eight treatments, defined in function of three species and its mixture, an…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Frank E. Gibbs, David L. Olson, William Hutchinson; Identification of a physical metallurgy surro…
This paper describes a comparative study of the three most commonly used field density tests: sand-cone, nuclear, and drive-cylinder. In order to evaluate the range of variability of these tests, a large-scale soil compaction apparatus was constructed so that soil could be compacted to a known water content and dry de…
Thig study was conducted to get a knowledge on chemical components of the cooked tuna bones (skipjack tuna bone and yellowfin tuna bone) as a food resource. The crude protein of tuna bone was around on the dry basis. The imino acid content (193 imino acid residues /1,000 amino acid residues) of collagen extracted from…
Two new species of Tortanus (Atortus), T. (A.) ampliramus and T. (A.) nishidai, are described from the northern Red Sea and the Gulf of Aden, respectively. These new species evidently belong to the recticauda species group in the recticauda species complex. The species group has a distinct distribution in the western…
A Gram-negative bacterium, strain AL98, was isolated from foul water inside of a deteriorated car tire on a farmer's field in Münster, Germany. The strain was able to considerably disintegrate natural rubber (NR), either in the raw state as NR latex concentrate or in the vulcanized state as NR latex glove, as well as…
Investigators at Marshall Space Flight Center (MSFC) are studying the potential benefits of cryogenic treatment for aerospace Aluminum (Al) alloys. This paper reports the effects of cryogenic treatment on residual stress, tensile strength, hardness, fatigue life, and stress corrosion cracking (SCC) resistance.
A method for equal-channel angular pressing (ECAP) that uses a rotary die was applied to SiC whisker reinforced 7075 alloy composites to produce a fine-grained microstructure suitable to attain superplasticity in the composites. Despite the low ductility of the composites, the rotary die permitted up to 10 passes of E…
Grain selection during solidification is of importance to the processing of solidified structure. It plays an important role in unidirectionally solidified products such as turbine blade. In order to understand the effect of the interfacial morphology on grain selection in unidirectional solidification, an experimenta…
シリカ充てんゴム複合材料中に存在するバウンドラバーの生成機構を検討した. シリカ1次粒子の粒径, 比表面積および単位面積当たりのシラノール基数 (N) が異なる数種のシリカとポリイソプレンを試料として, シリカ単体およびゴム中でシリカが形成する凝集構造を透過型電子顕微鏡により観察した. また, バウンドラバーのNMR測定より運動性に関する情報を得た. その結果, シリカ単体が形成する凝集塊は, シリカ表面に存在するシリカとの相互作用が弱い吸着水 (自由水) の脱離に伴い, 凝集塊のサイズが大きくなること, またその平均サイズはNの減少とともに小さくなり, Nが極端に小さい場合は凝集構造が形成されないことがわかった. これらの結果は…
The three-point bending strength of two-dimensional SiC fiber-reinforced SiC composites (SiC/SiCf) fabricated by chemical vapor infiltration (CVI) method and polymer infiltration and pyrolysis (PIP) method was measured at room and high temperatures up to 1600°C and the fracture behavior was investigated. The maximum s…
By chemical vapor deposition, we have tried to grow epitaxial films of graphene nano-ribbons on Pt (755) and TiC (755) surfaces. Some properties of these graphene films have been clarified by X-ray photoelectron spectroscopy, low energy electron diffraction, and angle-resolved ultraviolet photoelectron spectroscopy. N…
The effect of wheel speed and annealing including rapid thermal annealing were examined on the magnetic and structural properties of Nd/sub 15/Fe/sub 78.5/C/sub 5.5/B ribbons. Optimal coercivities in the range of 10-14 kOe have been obtained for different wheel speeds. However, the magnetic hysteresis loops of the con…
If a super-large core with a groove is molded with an axial molding press replacing the conventional die set, uneven density distribution occurs in the core because the molding pressure considerably converges on the groove of the core. Since this induces the residual stress in the groove to be released during the sint…