Materials Literature
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A rapid method is presented for the determination of gypsum and related minerals in natural and synthetic materials, based on the extraction of calcium from the matrix material using slightly ammoniacal water as a solvent with subsequent complexometric titration of the calcium using EDTA. The results compare reasonabl…
A peculiarity in the variation of the shape of the dechanneling function with an increase of the tilt angle has been discovered using Rutherford backscattering and characteristic X-ray methods. The discovered effect is due to the known mechanisms of dechanneling and is described qualitatively on the basis of the Focke…
Abstract The effects of aging at 85°C on a rubber‐modified polystyrene (HIPS) have been studied as a function of aging time in both air and nitrogen. Four different types of physical measurements were carried out on the aged samples. These included mechanical relaxation measurements, tensile stress–strain measurements…
The validity of our nucleation model of deformation twinning previously proposed for fcc metals has been quantitatively examined to determine the stacking fault energy γSF from the twinning stress τT, with particular attention to the orientation dependence of τT of pure copper crystals deformed in tension at 4.2 K. Ma…
The effects of various components on the thermal expansion coefficient of low‐expansion Cu 2 O‐Al 2 O 3 ‐SiO 2 glasses were examined. When a component of glass was substituted by another oxide, the expansion coefficient always increased, except for substitution of Al 2 O 3 by B 2 O 3 . This result indicates that the e…
The designation HT 50, HT 60, and HT 80 in this paper means the grades
The purpose of this paper is to provide (a) a guide for selecting the correct type of dust palliative and application rate for a given situation, (b) information to evaluate alternatives in terms of cost and energy, and (c) application guidelines to ensure the best job for a given situation. Descriptions of current co…
Abstract 13 C‐NMR has been used to examine a number of dichlorocarbene adducts of cis ‐ and trans ‐polybutadiene prepared in a two‐phase system. Dichlorocarbene was generated by reaction of aqueous or solid NaOH or KOH with CHCl 3 in the presence of a phase transfer catalyst. Monomer compositions, comonomer sequence l…
The single-crystal electron diffraction data of poly(ethylene sulfide) reported by Hasegawa, Claffey, and Geil have been reinvestigated. Taking into account possible crystal bending effects and dynamical scattering leads to an improved structural model. The final agreement factor of R = 0.21 is considerably better tha…
Abstract The electronic structures of organic ion‐radical salts, molecular conductors, and charge‐transfer complexes are described by solid‐state models with one valence state per site. Similar models occur in π‐electron theories of conjugated molecules or in spin Hamiltonians for magnetic insulators. A localized or v…
Abstract Der Verlauf der Fettkristallisation ähnelt dem der Aggregation und Flockulierung von Kolloiden. Früher aus Meßwerten empirisch abgeleitete kinetische Gleichungen für Aggregation und Flockulierung werden auf Meßreihen der Fettkristallisation und der Ausscheidung aus Emulsionen angewandt. Die Meßwerte werden in…
A text which deals with the basic principles of materials science and technology in a simple, yet thorough manner. This edition includes more worked examples and more detailed information on certain aspects of materials science
Variable-temperature multinuclear n.m.r. studies (13C, 13C-{103Rh}, 13C-{31P}, and 31P) are reported for [Rh9E(CO)21]2–, [Rh10E(CO)22]3–(E = P or As), and [Rh12Sb(CO)27]3–. In all cases, complete fluxionality of both the carbonyl and metal polyhedra are observed at high temperatures, and at low temperatures it has bee…
Abstract The evolution of glauconite in an imperfectly drained glauconiferous profile with texture B horizon in the Antwerp Campine (Belgium) has been studied by using different techniques (DTA, TGA, XRD and chemical analysis). It has been found that (1) the glauconite sand grains are mechanically broken down into cla…
A study has been made of the changes in the adsorptive behaviour of a carbon cloth with aqueous oxidative activation. It has been demonstrated that molecular-sieve action initially present in the cloth can be eliminated by progressive activation but eventually restored after the total pore volume of the cloth has been…
Cu-Ni-Cr-Mo-B low alloy steels whose total B content exceeds a certain limit show superior hardenability when they are austenitized at lower temperatures (≤900°C), although their hardenability decreases with higher austenitizing temperatures and longer holding times. As M23(C, B) 6 in these steels is partly undissolva…
Abstract The graft copolymerization of methyl methacrylate onto collagen initiated by tributylborane was investigated in aqueous medium. The total conversion, percentage of grafting and efficiency of grafting increased with increasing collagen content. The optimum conditions on the percentage of grafting and efficienc…
The texture formation process, dislocation structures, and deformation bands observed in rolled and cross rolled [100] (001) oriented iron crystals have been interpreted from the viewpoint of fundamental dislocation behavior and the properties of low-angle dislocation boundaries. Full agreement between theoretical exp…
The air-binding surfaces of aquatic and semi-aquatic insects and spiders were examined under a scanning electron microscope. The bristles that are instrumental in binding the film of air show distinctive characteristics within each phylogenetic group. Very small species can often maintain themselves in a bubble of air…
Incoherent quasi-elastic neutron scattering experiments have been performed on oriented crystals and on polycrystalline samples of (NH3(CH 2)3NH3)MnCl4 and (NH3(CD 2)3NH3)MnCl4 compounds in the 4-300 K temperature range. Backscattering and time of flight spectrometers were used; spectra were obtained using different r…