Materials Literature
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Cold-worked copper and α-brass, which have wavy and planar slip modes, respectively, were low cycle fatigued, and the relation between the fatigue life and the cyclic softening behavior was discussed in terms of the slip mode. The amount of cyclic softening is much larger in copper than in α-brass, and the fracture du…
In order to clarify the mechanism of formation of negative segregation zone, an experimental study has been done on uni-directional solidification of iron with carbon contents of 0.09 to 0.25% and the solidification rate of about 6mm/min. Melting and solidification of iron were done in crucibles with an abrupt change…
New adducts of phthalocyaninatocobalt(II) with piperidine, 1-methylimidazole, 3,4-dimethylpyridine, 3,5-dimethylpyridine, 4-methylpyridine, 3-choloropyridine, pyrazine, 3-ethylpyridine, 4-ethylpyridine, 3-acetylpyridine, and 4-acetylpyridine have been synthesized. Strong σ-donor bases form bis adducts, while low σ abi…
The effect of the carbon content of a steel on its dissolution rate in HNO3 is determined by measuring the temperature rise during dissolution. Steel dissolves in dilute HNO3 to an extent which increases with the increase of the acid concentration according to an autocatalytic mechanism. In concentrated HNO3 solutions…
Made available in DSpace on 2014-12-10T11:55:58Z (GMT). No. of bitstreams: 1 WOSA1981LR94200023.pdf: 2551063 bytes, checksum: 5af95e34c64fa2b505e503fab6a10e61 (MD5) Previous issue date: 1981
A B2. type Fe-40 at % Al ordered alloy was irradiated at 20 K either with fission neutrons or 2.5 MeV electrons. During isochronal annealing experiments of the radiation induced resistivity a different behavior was observed for the two irradiations. A decrease below pre-irradiated resistivity occurs after electron irr…
Abstract The specific resistance‐thickness of ScH x (vacuum 10 −5 to 5 · 10 −6 Torr) and Sc films (vacuum 1 · 10 −8 to 3 · 10 −8 Torr) relationships have been obtained by keeping a record of a film resistance directly in the course of condensation. The results are discussed according to the theory F UCHS ‐S ONDHEIMER…
The Cu-Pd-Ag dental base alloy of higher Ag contents which contains 15.8 at%Ag was aged isothermally at various temperatures between 573 and 773 K after quenching from the solid solution temperature into iced water. In order to investigate ageing characteristics of the alloy, hardness tests, electrical resistivity mea…
コンクリートの凍結融解試験方法の動向について述べている。本試験方法のJIS原案は, 日本の試験装置の現状を考慮してASTM C 666とほぼ同様の方法をとってはいるが, 細部については同一のデータが得られるように改められた。また参考試験として, 凍結融解後の長さ変化の測定が取り入れられている。
An antioxidant commonly present in black rubber, N-isopropyl-N'-phenyl-p-phenylenediamine (IPPD) caused very rapid oxidation and denaturation of purified hemoglobin. In the red cells, the reaction resulted in the formation of Heinz bodies, a decrease in reduced glutathione concentration, and stimulation of the hexose…
This paper reviews the corrosion problems of copper tube experienced in fresh water service. Following three distinct types of corrosion are discussed; (1) dissolution of copper, (2) pitting corrosion, and (3) erosion corrosion.Dissolved copper ion, which may cause green stains by forming insoluble cupric soap or acce…
Abstract Cerium Sulfate octohydrate crystals were crystallized from aqueous solutions under controlled conditions. The solubility measurements were carried out on temperatures between 10 and 80°. Thermoanalytical methods were applied for the study of the thermal behaviour of this compound. Raman spectra of polycrystal…
We report the results and interpretation of precision measurements of the thermal conductivity, electrical resistivity, and thermopower of potassium made from just below the melting temperature, 335.5 K, to 700 K. It is found that the Lorenz function is approximately 10% below the Sommerfeld value in the solid state,…
The damage of nickel-base heat resistant alloys exposed to hydrogen at high temperature and pressure was investigated. Tested materials were mainly Inconel 600, Hastelloy X and nickel. Inconel 600 solution-treated exhibited embrittlement due to the occluded hydrogen. Hastelloy X solution-treated did not exhibit embrit…
The dissolution properties of hydrochloride, sulfate, and iodide salts of berberine were compared. The apparent solubility and dissolution rate of the hydrochloride salt were less than those of the sulfate salt in media resembling GI fluids with respect to pH. The common ion effect on the solubility of berberine hydro…
This paper presents guidelines for corrosion testing of titanium with respect to five general modes of corrosion failure that are known to titanium. These modes are general corrosion, crevice corrosion, hydrogen embrittlement, stress-corrosion cracking, and anodic breakdown pitting.
In order to obtain the vibrational spectra of molten silicates, infrared emission spectra of molten M2O·xSiO2 (M=Li, Na, K, and x=1 to 4 or 5) were measured in the range of wave numbers between 25000 and 400000 m−1 at temperatures 50 K higher than their liquidus.Transmission spectra in the molten state were derived fr…
Studies by X-ray photoelectron spectroscopy (XPS) have been carried out in order to make clear the structure of vitreous silicate. In a previous paper, three kinds of oxygen ions, i.e. O0, O− and O2−, were analyzed from the O1s XPS spectra for several compositions of lead silicate glass by using an electronic computer…
Enteromorpha Link is primarily a marine genus that has been occasionally reported from inland salt springs and some inland lakes with high salt concentrations (Collins, 1909; Smith, 1950). In contrast to marine species, the mature thalli of most freshwater Enteromorpha consist of long, usually branched, hollow tubes w…
Plastics may be subjected to mild stress and strain without failure or they may be subjected to weak solvents or aqueous surfactants without failure, but when they are subjected to combination of these two types of variables they often suffer catastrophic brittle fracture. Such failure has been named environmental str…