Materials Literature
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Room-temperature electrical resistivity and Hall effect measurements as a function of pressure are reported on p-type MoS 2 and on n-type MoS 2 , MoSe 2 and MoTe 2 . In each case, the resistivity decreases under pressure, due to an increase in the carrier concentration. The Hall mobility is relatively pressure-indepen…
PVC is a very versatile thermoplastic. Unfortunately, its potentialities often cannot be realized in practice because of the difficulties encountered in processing. For instance, successful extrusion is possible only in a limited range of conditions and with the use of processing aids. If processing temperatures and s…
To clarify the internal corrosion mechanism in food cans, the effect of trimethylamine oxide (TMAO) on the liberation of tin from tinplate was examined. In the range of pH 2.8-8.0, tin liberation by TMAO was maximum around pH 4, at which there was also marked decomposition of TMAO. Around that pH, the amount of tin li…
Environmental Condition : Air Temperature (23.5±0.5℃) and Relative Humidity (50±10%) were kept constant in a circulation type wind tunnel. Surface temperatures of inside wall, ceiling and floor were kept almost equal to air temperature. Air velocity was the only variable with <10cm/s, 30cm/s, and 50cm/s. Subjects were…
During irradiation, some of the mobile point defects induced by irradiation migrate to and pin down dislocations. Whereas a behavior of these pinning points on dislocations is subject to controversy at present,1, 2 the number of these pinning points is considered to increase, at least, during irradiation. Normally, si…
The phenomena induced in austenitic stainless steels by cathodic charge of hydrogen were phase transformation, hydride and numerous surface cracks formation as previously reported. In this study, the hydrogen induced phases were compared with those of quench or stress induced, and the hydrides were compared with those…
59 Co N.m.r. spectra of 24 µ-carboxylato-di-µ-hydroxo-bis[triamminecobalt(III)] complexes have been examined. Chemical-shift values are constant for all the complexes. However, the linewidths differ significantly. It is shown that the 59Co relaxation is a function of the basicity of the oxygen atoms of the symmetrical…
Computer simulation of back reflection Laue patterns now provides the means to plot Laue patterns for any crystal system in any orientation. This capability makes it possible to determine, rapidly and accurately, the orientation of single crystals and large grains in polycrystalline materials even in cases where littl…
With the aim of obtaining a siliconized layer without any porosity, a silico-carburizing method using a hot bath consisting of Si, carbonate (K2CO3, Na2CO3, Li2CO3, SrCO3 or BaCO3) and neutral salts (KCl, NaCl) has been studied. The results obtained are summarized as follows.(1) In a hot bath consisting of neutral sal…
The current efficiency of the lens system for an accelerating lens composed of three anodes combined with an auxiliary magnetic lens in a field emission scanning electron microscope is described. In this system the spot size for the needed primary beam current can satisfactorily be minimized since the working distance…
Anodic polarization behaviours of SUS 304 and SUS 316 stainless steel open surface and those of crevice-containing specimen were studied in 0.5M NaCl, NaBr, and NaI solution at 25°C. The results obtained were summarized as follows. The crevice corrosion potentials or the pitting potentials of the crevice-containing sp…
No method has so far been established for evaluating the yarn knittability before knitting. Thus, any yarn defective in knittability cannot be found out until it is actually knitted. As an aid to solve this problem, we investigated various methods for evaluating the yarn knittability and obtained the following conclus…
The program package described in the paper performs the transformation of the stiffness, piezoelectric and permittivity (or conductivity) matrices of an anisotropic material under a rotation of the co-ordinate system.
Calcium is a member of the Alkaline Earth Family, members of which have atoms with well‐shielded nucleii and two valence electrons which are readily lost thereby forming divalent cations. The basic cation, Ca++, neutralizes acids, is essential for plants, and acts as a flocculator and precursor of granular structure o…
Polarized low-frequency Raman spectra of imidazole single crystals were measured with a He-Ne laser source. A new band at 172 cm−1 (Bg) was observed. An assignment for the lattice vibrations of imidazole crystals is proposed on the bases of this Raman data and far-infrared spectral data of Perchard and Novak, as well…
This paper highlights new prototype development work using copper-nickel alloys for vessel hulls and seawater intake piping systems. Initially, maintenance-free performance and economies that can be realized through the use of copper-nickel alloys in salt water environments are described. Data presented shows performa…
Abstract
Brittle fracture propagation-arrest characteristics of low C-Mn steel plates containing 0-5%Ni have been investigated by newly developed Tapered Double Cantilever Beam Test, which is a small size test having good correlation to large size Double Tension Test. The results obtained are as follows:1) Brittle fracture pro…
Abstract The complex compliance in extension of gels of poly(vinyl chloride) (PVC) in di(2‐ethylhexyl) phthalate (DOP) and in tricresyl phosphate (TCP) was measured over the frequency range from 0.6 to 0.006 cps and the temperature range from −66 to 65°C: the weight fractions of DOP and TCP in the gels were 0.32, 0.40…
Abstract The dielectric properties of natural rubber, synthetic polyisoprene, and polybutadiene samples crosslinked with sulfur and of natural rubber samples crosslinked simultaneously with sulfur and dicumyl peroxide were studied. In the investigated systems, the number of polar groups in unit volume and the crosslin…