Methods for assessment of cleanliness in superclean steels. Application to bearing steels
The requirements for cleanliness in bearing steels are so high that special methods have to be used in order to characterize their inclusion content.
Materials Literature
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Low‐temperature Magnetic Properties of Terbium Orthoferrite Single Crystals
Abstract Spontaneous and by an external magnetic field induced magnetic phase transitions in TbFeO 3 have been experimentally studied. Precision investigations of velocities of transmission and attenuation of sound wave were made, the processes of formation and rearrangement of magnetic structure examined and its chan…
Development of a Hydrogen Resistant Superalloy for Single Crystal Blade Application in Rocket Engine Turbopumps
A new single crystal N&Fe based superalloy, designated THYMO-NEL 8, was developed in order to satisfy the specific requirements of rocket engine turbopump airfoils. The principal objective was to obtain an alloy with a high fatigue resistance together with a low susceptibility to hydrogen environment enbrittlement (HE…
Pyroelectric properties of linear aromatic polyurethanes
Two types of aromatic polyurethanes, poly(hexamethylene phenyl dicarbamate) (PUH6) and poly(heptamethylene biphenylene dicarbamate) (PUB7) have been synthesized by the polycondensation method. Structural, pyroelectric and dielectric properties of these polyurethanes were studied. The pyroelectric activity was studied…
Distributions on localized iron loss of three-phase amorphous transformer model core by using two-dimensional magnetic sensor
In the past, we reported on the two-dimensional magnetic properties of the three-phase transformer model core with silicon iron. They are measured by using the two-dimensional magnetic sensor. In this paper, the silicon iron core results are compared with those of an amorphous power core. As the results, the differenc…
Analysis of Texture Distribution in NdFeB Hard Magnets by Means of X‐Ray Diffraction in BRAGG‐BRENTANO Geometry
Three different methods are used for the quantitative local texture analysis of fibre textures. Two methods are based upon the evaluation of BRAC‐BRENTANO diffraction diagrams. In the first method relative intensity parameters are calculated, whereas in the second Rietveld preferred orientation factors are determined.…
Studies on Filament Migration in Air-jet Textured Yarns and the Relationship between Migration Parameters and Properties
A study to characterize the structure of air-jet textured yarn in terms of its migration parameters has been carried out by using the tracer fibre technique. An attempt has been made to establish the relationship between the migration parameters and the properties of air-jet textured yarns using polyester (dry and wet…
Synthesis and Properties of Poly(p-benzamide-b-propylene oxide)
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSynthesis and Properties of Poly(p-benzamide-b-propylene oxide)Bernabe L. Rivas, Bernardita Barria, Guido S. Canessa, Franco M. Rabagliati, and Jack PrestonView Author Information Departamento de Polimeros, Facultad de Ciencias Quimicas, Universidad de Concepcion, Casilla 3-C,…
Adsorption Hysteresis and Interparticle Capillary Condensation in a Nonporous Carbon Black
The adsorptives 2,2-dimethylpropane, trichlorofluoromethane, and trimethylamine, when adsorbed on the nonporous graphitized carbon black Sterling FT-G (2700), all exhibit hysteresis arising from interparticle capillary condensation. The hysteresis loops have been analyzed to obtain the adsorbent particle size distribu…
Interaction of Derivatized Capped Iron(II) Porphyrin Complexes with CO and O2
A series of porphyrins strapped and capped by benzene and amidobenzene rings have been prepared. O(2) and CO bindings to their iron(II) complexes have been examined, and the role of hydrogen-bonding in stabilizing O(2) binding has been measured. Each comparison between the benzene ring (no H-bonding) and the amidobenz…
Dynamic deformation and fracture response of a 6061-T6 Al–50 vol. % Al[sub 2]O[sub 3] continuous reinforced composite
In this paper results are reported on the influence of strain rate and shock loading on the deformation and fracture response of a 6061-T6 Al–50 vol. % Al2O3 continuous fiber-reinforced composite as a function of composite orientation. The stress-strain response was found to vary substantially as a function of loading…
Electrolytic Separation Factor for Hydrogen and Deuterium on Platinum Electrode
The electrolytic separation factor (S factor) of hydrogen isotopes for platinum was measured by means of quantitative mass analysis. The S factor was 5.0±0.2 at 298 K in sulfuric solution. The value was discussed on the basis of the transition state method. The temperature effect on the S factor was observed and the a…
An Analysis to Compare Conventional Methods for Estimating Bending Rigidity of Fabrics
An aspect is presented to analyze the interrelation among the conventional tests of the bending rigidity of textile fabrics, such as cantilever, Clark, heart-loop methods, etc., which enables it to compare and estimate the errors and applicable ranges of these methods. A strip of fabric is simulated by an elastic slen…
Single Crystal Growth and Electrical Properties of Lanthanum- and Gadolinium-Doped BaTiO<sub>3</sub>
Single crystals of (Ba0.96-xLnxSr0.04)TiO3 (Ln=La, Gd) were grown over a composition range of x=0.001 to 0.03. Electrical resistivities of the single crystals were measured by the DC four-probe method. The temperature dependence of resistivities of these crystals changed from semiconductive to metallic at the Curie te…
Effect of Wettability of Grains by a Liquid Phase on Grain Growth Behavior of La-Doped SrTiO<sub>3</sub> Ceramics
The relationship between the grain growth and the wettability of grains by a liquid phase was discussed on the basis of the observation of the microstructure of La-doped SrTiO3 ceramics and the measurement of the contact angle of the liquid phase (Sr1Ti3.206La0.328O7.904) on the SrTiO3 substrate using the sessile drop…
Degradation Behavior of PTCR BaTiO<sub>3</sub> in Reducing Gases
Degradation of positive temperature coefficient of resistivity (PTCR) properties of semiconducting BaTiO3 ceramics that were annealed in reducing gases was studied from a mechanistic viewpoint mainly by measuring the electrical and dielectric properties, using reflectance and ESR spectroscopies, as well as by gas anal…
Adhesion and Structure of Copper Oxide Films.
純銅と種々の合金銅において, 酸化膜の基材に対する密着性を, 300, 350, 400℃の3つの酸化温度につき, 酸化膜の剥離試験, XRD, SEM, TEMおよびAESによって調べた。表面粗さを統一した場合, 全試料の酸化膜の密着性は, 酸化温度の上昇とともに低下した。タフピッチ銅が最も厚い密着性の良い酸化膜を生じ, 主してCu2Oが観察された。タフピッチ銅の表面粗さを変化させた場合, 膜の密着性は表面粗度からは傾向が把握できなかったが, CuOの生成量の増加とともに低下した。Cu-Ti合金の酸化膜は膜の密着性が劣り, Tiの増加によりCuOがより多く観察されるようになった。CuOの生成が酸化膜の密着性の低下に大きく関与して…
Crystallization of apocrustacyanin on the International Microgravity Laboratory (IML-2) mission
Rod-shaped crystals of apocrustacyanin C1 have been grown under microgravity on the International Microgravity Laboratory (IML-2) NASA space shuttle mission using the vapour-diffusion set-up of the Advanced Protein Crystallization Facility (APCF). The crystals obtained under microgravity are compared with crystals gro…
Enhancement of Thiacetazone Solubility by Isoniazid in Aqueous Solutions
AbstractThe aqueous solubility of thiacetazone was enhanced in the presence of different concentrations of isoniazid. The nature of this solubilization was investigated by measuring some physicochemical properties of isoniazid in water. Slight surface activity and conductance were observed. Osmotic pressure and partit…
Penetration of kerosene into carbon black-loaded SBR vulcanizates
The influence of the type and concentration of carbon black on the penetration rate, p, and diffusion coefficient, D, of kerosene in SBR rubber composites were investigated. The penetration rate, p, decreases with the FEF carbon black concentration owing to the formation of carbon agreggation. Meanwhile, p has a peak…