Materials Literature
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It is shown by model calculations that the dispersion of the diagonal part of the dielectric constant near the plasma edge in a metallic crystal has a strong influence on the magneto-optical properties. The plasma edge leads to resonancelike peaks in the Kerr rotation and Kerr ellipticity spectra and to a strong enhan…
摘要 结合快离子导体玻璃的结构特点和倪嘉陵(Ngai) 的低能激发、弛豫、耗散统一理论, 依据非Markov 方程探讨了快离子的输运特点, 导出了非晶态快离子导体电导的频率一温度依赖关系. 理论方法与现有快离子导体电导理论不同, 结果表明与实验数据符合较好, 理论能较好地描述低温下电导的色散现象. 色散的程度与表征物质内部结构差异的参数— 红外发散指数n有关. Abstract Based on the characteristics of superionic glasses and a physical picture of unified theory of the low-frequency fluctuation, di…
3BaO·3B2O3·2GeO2 is a new compound in the ternary system BaO-B2O3-GeO2. Its crystallization process has been studied by means of thermoanalysis method. The temperature of crystallization decreases distinctly with decrease of the grain size. The activation energy of crystallization of the amorphous material with differ…
少量溶液の取り扱いに有利な重量基準による標準添加法を原子スペクトル分析法と組み合わせて検討した.従来の容量基準による方法と異なり,試料溶液の分取量,標準溶液の添加量,最終溶液量をそれぞれ正確に一定にする必要はなく,試料溶液の希釈率を補正係数として用いることにより従来法となんら変わりなく標準添加法を適用することができ,正確さ及び再現性とも良好であった.本法をアルミニウム合金(NBS 87a,NKK 916)及び99.99%アルミニウム中のマグネシウムのAAS定量及び標準岩石(GSI-JG-1)中のリチウムのICP-AES定量に応用し,良好な結果を得た.
Diamond was synthesized by using the Fe-Ni-Cu alloy. As compared with the diamond-formation region obtained with the Fe-Ni alloy, the region shifted to the lower temperature and pressure side. This shift has been explained in terms of the change of melting temperature due to an addition to Fe-Ni alloy, because Cu itse…
The corrosion of copper in sulfuric acid/hydrogen peroxide etching solutions with n-alkylamines was studied by means of weight loss and polarization techniques at various flow rates of the etching solution.The addition of n-butylamine to the basic etching solution (2mol H2SO4+2mol H2O2+1kg H2O) led to both the polariz…
Magnetic field effects on R-and R'-spectra in YbCrO3 are investigated by using a magnet system in High Magnetic Field Laboratory, Osaka University. The spin system orders antiferromagnetically below TN118 K with the r"Γ2-type configuration. The experimental data of the shift in R-line show complicated behavior in the…
ジフェニルメタンジイソシアナートを含む化合物とビスフェノールAのジグリシジルエーテルとをN-メチルモルホリンの存在下, 加熱して得られる樹脂硬化物の曲げ特性を25℃で測定した, 曲げ強さはイソシアナート化合物とエポキシ化合物のモル比 (0.63～51) 及び加熱処理温度 (180, 200, 及び225℃) などに強く依存することを見いだした. 硬化物の赤外線吸収スペクトルを測定し, イソシアヌラート環とオキサゾリドン環の形成割合を解析し, 曲げ強さとの関係について考察を加えた. 硬化物中の未反応のイソシアナート基量をスベクトルの吸光度比から定量化し, 硬化反応がほぼ終了するまで, 更に加熱し, 曲げ強さを追跡して樹脂組成物の硬化…
Hot corrosion behaviour of a nickel base alloy by vanadium has been investigated at 600 and 700°C. Crack growth studies, metallographic and SEM, X-ray examinations have been carried out to understand the nature of hot corrosion and crack propagation. Spot tests, ternary diagram determination and weight change experime…
The evolution of the dislocation microstructure during irradiation of a deformed Fe-2 1/4 Cr-1 Mo ferritic alloy was characterized by two competing processes. At low temperature, the dislocation density increased due to loop formation and interaction. At higher temperature, the dislocation density decreased due to rec…
Tetrahalogenochromates(II) containing mixed halides, [NRH3]2[CrClxBr4–x](R = Me, Et, Prn, Bun, or n-C8H17), exhibit similar ferromagnetic behaviour to the homoleptic tetrahalogenochromates(II). Broad spin-allowed d–d absorption bands at ca.10 900 cm–1 in their reflectance spectra indicate tetragonal six-co-ordination…
Abstract Aerial cable lines running in forests are often damaged by animals. This paper introduces an animal‐resistant cable design by analyses of the fracture of metals when a shearing force is applied. As a result of the analyses, it is understood that when shearing forces are applied repeatedly to a metal plate wit…
18-8ステンレス鋼を大気中,400～700℃ で酸化すると,光干渉性の酸化皮膜が形成する。オージェ電子分光法とX線光電子分光法の測定結果により,この酸化皮膜の主成分はCr,Fe,Oであり,Ni含有率は少ないことがわかった。酸化温度の上昇に応じて,酸化皮膜中のFe含有率が減少し,Cr含有率が増加する傾向がある。酸化皮膜の外層はFe203あるいはFe304+Cr203,内層はFeO+Cr203からできている。高温酸化処理はステンレス鋼の耐孔食性に大きく影響を与え,400℃ で酸化した試料では通常め孔食点がでており,600℃ で酸化した試料では,表面皮膜がはく離されて,素地を侵食する二段階であるζ とがわかった。酸化濃度が高いあるいは…
Shape memory alloys are characterized by a thermoelastic martensitic transformation and the presence of ordering in the parent phase and martensite. Crystal structure studies of parent and martensite phases in a CuAlMn alloy show that a thermoelastic transformation from an or- nered parent phase of DO3 type to an M18R…
The earliest substantial experimental work to grow diamond from gaseous phase at low pressure was disclosed by Eversole of UCC in 1962 and independently by Russian team of Derjaguin. Recently, the diamond film and particles with well-define habites were synthesized by Spitsyn and his co-warkers by the chemical transpo…
A washing method was developed to import beneficial mechanical effects to sheets of soiled cotton fabric, fabric deformation clash of the fabric against wire gauze and penetration of a liquid flow through the fabric. This method consists in pulsating flows of through the fabric placed between two wire gauzes set in a…
Søderberg selfbaking electrodes are used to conduct electric current into the electric reduction furnace. Two-dimensional computer models for the computation of temperatures, electric currents and thermal stresses have been used for a long time in the R&D effort to improve the construction and operation of the ele…
Experimental Results on the rotatory power of a stresed Cholesteric Liquid Crystal are reported. The dependence on the applied strain is measured and a critical dependence on the light wavelenght is shown. Applications of this effect to optical modulation is also reported.
The use of olivine sand as a molding material is limited in comparison with silica sand, and its characteristics are not sufficiently known. The previous papers by the authors described that the olivine sand mold prevented burning not only in the case of high manganese cast steel but also of low carbon cast steel. Met…
Some physical as well as chemical factors would take part in the appearance of corrosion morphology of metals in humid environment. In this paper, some cases of corrosion on the copper alloy were demonstrated which were caused by the capillary action due to superficial structure of the metal. A model was proposed in w…