Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
From chemical analyses performed on an Arago profile, it met the requirements of the Podzol order, except for exchange properties. The cation exchange capacity was low and the ΔCEC never reached the limit of 8 meq/100 g. Qualitative and quantitative mineralogical analyses showed that illite was the predominant compone…
Oriented Si steel containing up to 6 percent Si was produced by gaseous siliconizing of oriented 3.25-percent Si steel strip. Dc magnetization curves in the with-grain (rolling) direction and ac core loss and magnetostriction measurements in both the with- and cross-grain (transverse) directions were obtained before a…
Sedimentation and diffusion constants of wormlike polymer chains have been calculated using methods of Kirkwood and collaborators. The chain statistics are described according to Hermans and Ullman using the (Kratky–Porod) model. The results are obtained for several chain lengths at varying degrees of flexibility for…
Abstract The primary aggregate structure in high structure blacks is broken down when the blacks are milled in rubber. The breakdown, it is shown further, involves the disruption initially of more easily disrupted forces, and then subsequently of more difficultly disrupted forces. If the total structure breakdown is s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeteropolyvanadomanganates(IV) with Mn:V=1:11 and 1:4Charles M. Flynn Jr. and Michael T. PopeCite this: Inorg. Chem. 1970, 9, 9, 2009–2014Publication Date (Print):September 1, 1970Publication History Published online1 May 2002Published inissue 1 September 1970https://pubs.ac…
Abstract Hydrogen cyanide is a minor product of degradation of copolymers of styrene and acrylonitrile. The liquid products have been separated and identified by combined gas chromatography and mass spectrometry (GC‐MS), as styrene, acrylonitrile, toluene, and benzene. The ratio of styrene to acrylonitrile monomers in…
A current-controlled negative resistance has been found in thin single-crystal wafers of silicon-doped yttrium-iron garnet (Si-YIG). Switching properties have been examined, and relaxation oscillations in the range 0.5–1 MHz have been established in the negative resistance region. A conductive memory state having a be…
Abstract Mit Hilfe eines quasi-adiabatisch und kontinuierlich arbeitenden Hochtemperatur-Kalori-meters wurde die spezifische Wärme von Aluminium und Wolfram sowie die Schmelzwärme von Aluminium gemessen. Eine atomistische thermodynamische Analyse ermöglicht eine Aussage über den Beitrag der anharmonischen Gitterschwin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRaman Scattering and Polarization Measurements of Isotactic PolypropyleneP. D. Vasko and J. L. KoenigCite this: Macromolecules 1970, 3, 5, 597–601Publication Date (Print):September 1, 1970Publication History Published online1 May 2002Published inissue 1 September 1970https:/…
Abstract Studies of the growth of single ozone cracks show that a critical severity of deformation is required for growth to occur. Above this deformation the rate of single crack growth is essentially independent of strain and for a number of rubbers at normal temperatures is proportional to the ozone concentration.…
Abstract SiH 3 K, SiH 3 Rb und SiH 3 Cs haben bei Raumtemperatur Kristallstrukturen vom NaCl‐Typ (Gitterkonstanten a = 7.23, 7.52 bzw. 7.86 Å). Hieraus resultiert für das Silyl‐Anion, SiH 3 − , ein effektiver Ionenradius von 2.2 6 Å. Die gegenüber CH 3 K (NiAs‐Typ) abweichenden Kristallstrukturen werden auf die mehr k…
Abstract By the use of thermal volatilization analysis (TVA), 292°C was chosen as a suitable temperature for a preliminary experimental survey of the thermal degradation of styrene–acrylonitrile copolymers. TVA also indicated that there is no fundamental change in reaction mechanism as the acrylonitrile content of the…
The most achromatic quarterwave plates appear to be rhomb-type devices. General relations are given for calculating the phase retardation of these devices and are used to determine the variation of the phase retardation with wavelength and with acceptance angle for different rhomb designs. Length-to-aperture ratio, be…
Magnetic properties of manganese compounds with C1 b -type crystal structure are studied. CuMnSb (lattice parameter a =6.09 5 Å) is antiferromagnetic with a Néel temperature of 55°K and an asymptotic Curie temperature of -160°K. The paramagnetic Bohr magneton number per Mn is 5.4 7 . PdMnSb ( a =6.24 6 Å) is ferromagn…
It is shown by transmission electron microscopy that a rather obvious distinction exists for the interfacial free energies of high-angle grain boundaries, low-angle grain boundaries, and twin boundaries in f.c.c. metals and alloys. The characteristics of these differences are analysed, and a balance of interfacial fre…
A model has been developed to describe the kinetics of void growth in metals during irradiation which explicitly includes the presence of both migrating interstitials and vacancies. It is clear that void growth can occur only when an excess flux of vacancies arrives at the void surface and this can be achieved by taki…
The thermal effects of different types of void volumes within a fuel pin, such as porosity, central void, and the gas gap between fuel and clad are examined. A new general relation for the dependence of thermal conductivity on the closed porosity is deduced. For given gas contents and specific ranges of pore temperatu…
Arrays of gas bubbles of uniform size are generated in a liquid and subjected to sound at a frequency of 30 kHz. In a viscous mixture of glycerine and water, sonoluminescence is produced in the absence of cavitation noise or streamer activity. Under relatively low amplitude conditions the light occurs in flashes with…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic effect of metal oxides on thermal decomposition reactions. II. Catalytic effect of metal oxides on the thermal decomposition of potassium chlorate and potassium perchlorate as detected by thermal analysis methodsWinfried K. Rudloff and Eli S. FreemanCite this: J. P…
Small- and wide-angle X-ray investigation of drawing and annealing of polypropylene quenched films in wide ranges of draw ratio (λ = 1-20) and of temperature (20°-150°C) shows the discontinuity of the elementary act of transformation in the microneck of the original lamella of the microspherulitic into the microfibril…