Materials Literature
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The effects of surface microstructure and chemical compositions of steels on characteristics of Fe-Zn intermetallic phases formed on continuously galvanized steel sheets have been investigated, using ultra low carbon and low carbon steels.From a SEM observation, the morphology of Fe-Zn IMP formed at interface between…
A study has been made which correlates grain size with magnetic properties so that the proper range of grain size in ferrite materials can be determined for recording head applications. The effects of Ni-Zn and Mn-Zn ferrite grain size on 1) initial permeability, 2)B-Hloop, 3) density of ferrites, and 4) core processi…
Abstract 2‐Vinyllhiolane‐1,1‐dioxide (Ia) and 2‐vinylthiane‐1,1‐dioxide(Ib) have been prepared and polymerized with free radical initiators to obtain poly(sulfonyl‐hex‐2‐enylene) (IIa) and poly(sulfonyl‐hept‐2‐enyIene‐ co ‐2‐vinylthiane‐1,1‐dioxide) (IIb), respectively, via a ring‐opening mechanism. Structures of the…
Studies of the silicon absorption spectrum above the K-edge in crystalline silicon carbide SiC and in pure crystalline silicon are reported. We show that for these systems, no high order scattering is needed to interpret the experimental results down to few eV above the edge. This behaviour can be explained assuming,…
Benzene solutions of rhodium octaethylporphyrin dimer in the presence of H2 and CO catalytically produce formaldehyde and methanol when irradiated with 300 nm light.
Ixrnorucrron The Mo-MoO, (MOM) equilibrium is a potentially useful oxygen bufer in experimental petrology, not least because of the advantages of using relatively inert Mo as a capsule material. However, there is considerable disagreement among the previous calibrations of this buffer (see Table I for a summary). More…
Environmentally enhanced crack growth data for 33% Na 2 O‐67% SiO 2 and 33% Li 2 O‐67% SiO 2 (mol%) were obtained. Corrosion data for the same glasses as determined by infrared reflection spectroscopy and atomic absorption spectroscopy were also measured. It was determined that, of the tested environments, those and o…
Abstract
We measured the twist rotation at the wall-nematic liquid crystal interface in MBBA and ZLI 1738 samples placed in a magnetic field giving a pure twist deformation. Homogeneous boundary conditions were obtained by rubbing two silane coated glasses softly with teflon. In the samples examined, a rotation angle of the or…
The effects of polyethylene glycol (PEG) 4000 dissolved in the crystallization solvent on the size of agglomerated crystals of phenytoin prepared by the spherical crystallization technique with a bridging liquid (i.e. isopropyl acetate) were investigated. The average diameter of agglomerated crystals at equilibrium, w…
Four modifications (monohydrate, hemihydrate, anhydrate, and amorphous form) of oxyphenbutazone were prepared and characterized by the use of X-ray powder diffractometry, thermal analysis, infrared spectrophotometry, and elemental analysis. The physicochemical stability of the amorphous form was quantitatively investi…
An existing model of the diffusion of dopant in crystalline silicon is presented. The model is used in predicting semiconductor device properties. For small concentrations of dopant, the diffusion is linear. However, at large concentrations, enhanced diffusion occurs. This may be modelled by a concentration-dependent…
Cyclic deformation and fatigue behavior of polycrystalline Cu–Al–Ni shape memory alloys above Ms point have been studied in a preceding paper (Trans. JIM, 27 (1986), 592), and the experimental results have been analyzed in the present paper. Almost all the experimental results, that is, extrapolation of the transforma…
Many researches on ceramics have been reported, but brittleness is a key problem to be overcome. However, no generalized method on impact test of ceramics has been reported.The total absorbed energy evaluated from the Charpy impact test for brittle materials includes largely the energy absorbed by the machine and the…
N-hexadecyl-p-cyanopyridinium iodide was studied using X-ray scattering, differential scanning calorimetry and polarized light microscopy. Preliminary results reveal that the material is thermochromic, turning from yellow to red upon entering a liquid crystal phase at 104°C. The mesophase is of the smectic B type, whe…
The mechanism of improvement on corrosion resistance by copper addition to ferritic stainless steels was studied electrochemically. Cathodic reaction of copper added ferritic stainless steels is accelerated with progress of corrosion, presuming as the effect of fine metallic copper precipitated on surface. Anodic reac…
Compressibilities of pyrite and cattierite have been examined by the single-crystal X-ray diffraction method up to 42 kbar and 36 kbar, respectively. Both S–S and M–S (M: Fe, Co) bonds in both of the minerals are contracted linearly with pressure within the experimental pressure ranges. However, contraction of the S–S…
Abstract A single crystal YAG: Ce 3+ annular scintillator axially placed in a movable light guide forms the essential part of a new BSE detector. Comparison of properties of this detector with those of a semiconductor detector is made. The bandwidth, signal‐to‐noise ratio, capacitance effects, and relative efficiency…
Binuclear [Co2(RCO2)4L2] and trinuclear [Co3(RCO2)6L2] cobalt(II) carboxylate complexes have been prepared (R = unsaturated alkyl, L = sterically hindered amine). The roles of electronic and steric effects on the formation of oligonuclear cobalt(II) carboxylates are discussed. The temperature dependence of their antif…
Most ceramic materials are unsuited to conditions involving non-uniform temperature distributions because of their inherent brittleness. Ceramic cutting tools operate in conditions of rapid temperature variation and consequently thermal cracking is frequently observed. Under certain cutting conditions, these cracks ar…