Materials Literature
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This paper reports the effects of grain size on magnetoacoustic emission and magnetic Barkhausen effects in sheets of decarburized steel and on the effects of grain size and carbon content on the bulk magnetic properties of decarburized and low carbon steels. Results show that, although the grain size does affect the…
A technique for characterizing the entire static hysteresis loop using Fourier analysis has been developed. The method goes beyond the familiar listing of saturation moment, squareness, coercivity, and switching field distribution to describe the magnetization process in detail. The essence of the technique is to "unf…
The pore size distributions in random assemblies of equal spheres are obtained from the computer experiments and the theoretical study is made of the results within the framework of the Percus–Yevick approximation.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of a carbon equivalent of iodosylbenzene with iron-porphyrins: a ready access to N-alkylporphyrin complexes involving five-membered [cyclic] Fe-O-C-C-N metallocyclesJean Paul. Battioni, Isabelle. Artaud, Daniel. Dupre, Philippe. Leduc, Irena. Akhrem, Daniel. Mansuy,…
Abstract Samples with an increased content of chloroallyl structures were prepared by chemical degradation of poly(vinyl chloride) (PVC) using potassium tert ‐butoxide. The samples were thermally dehydrochlorinated in an inert atmosphere, and their dehydrochlorination curves were determined by the continuous potentiom…
Thermoluminescence, phosphorescence, and ac conductivity measurements have been performed at room temperature on as-grown or Li-, Na-, and Cu- electrodiffused synthetic quartz, beta or x ray irradiated, to confirm the ionic nature of the charge carriers in the radiation-induced conductivity (RIC). Comparison between R…
After operation of a basic oxygen furnace with a MgO‐C brick lining, formation of a dense MgO layer is observed near the working surface. It is affected by soak atmosphere gas in the first stage of operation. As operation of the furnace proceeds, the MgO‐C brick being submitted to cyclical heating and cooling, interna…
An experimental program to study the effect of impact on reinforced concrete slabs was carried out. The experimental program attempted to simulate the striking of flying objects at the center of a reinforced concrete slab to study the response (dynamic deflection) of that slab due to this load. The program consisted o…
Abstract The effects of seven tertiary amine accelerators on curing of bisphenol‐type epoxide resins using azelaic acid as a curing agent have been investigated. The structure of the cured resins is characterized and reaction and structure schemes are proposed. The reaction mechanism and the resulting structure of the…
Measurements of the effects of stress on the initial magnetization curve of a sample of 1 % Mn pipe line steel and on its reversible component are presented. Stress-induced changes in the reversible and irreversible magnetization components are shown. Examples of magnetization changes induced by tensile and compressiv…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReduction of nitric oxide by carbon monoxide over alumina-supported palladium catalystHideaki Muraki, Hirofumi Shinjoh, and Yoshiyasu FujitaniCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 3, 419–424Publication Date (Print):September 1, 1986Publication History Publishe…
A differential scanning calorimeter (DSC) investigation (heating rate 10 K/min) is presented on the multiple transition (relaxation) spectra of PMMA: Tβ < Tg; Tg, Tll > Tg; and Tlρ > Tll, as a function of tacticity. Specimens are characterized by fractional triad content: isotactic (it-), Xii; syndiotactic (st-), Xss;…
The efficiencies of a solid absorption heat pump are calculated with the help of chemical models. The first one is based on a reversible analysis where only the energy contributions to regenerate and insure continuous operations of the engine are taken into account. In the second one, the complete thermochemical behav…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of poly[1-(trimethylsilyl)-1-propyne] with extremely high molecular weight by using tantalum pentachloride-triphenylbismuth (1:1) catalystToshio Masuda, Eiji Isobe, and Toshiyuki HamanoCite this: Macromolecules 1986, 19, 9, 2448–2450Publication Date (Print):Septemb…
Measurements of thermodynamic compatibility, technological properties, stress-strain isotherms at high elongation, birefringence, and wide-angle x-ray diffraction have been made on blends of guayule rubber (cis-1,4-polyisoprene) and trans-polyisoprene (t-PI). Both cross-linked and un-cross-linked systems, prepared by…
Polypropylene containing the blowing agent azodicarbonate was first grafted with vinyl trimethoxy silane, then crosslinked using the hot water treatment. Two heating stages initiated the blowing agent and formed polypropylene structural foam. The effects of such reaction variables as initiator, cross-linking agent, cr…
Abstract Mineralogical analysis of Devonian Red Marl using XRD, TEM, SEM and EDAX showed that it consisted of illite, quartz, and feldspar with minor amounts of chlorite and hematite. Physico-chemical changes in the soil minerals on reaction with lime (calcium hydroxide) from one day up to two years were investigated…
The reduction of proline by Clostridium sporogenes NCIB8053 is coupled to transmembrane proton translocation in an uncoupler-sensitive fashion (and might therefore conserve free energy). This finding serves to explain the increase in the growth yield of this organism when proline is added to a defined growth medium co…
Heat treatment of polyester yarns induces the selective crystallization of the cyclic trimer [(GT)3] in the form of polygonal solids on the fiber surfaces. At the temperature studied, namely, 200°C, the diffusion rate of (GT)3 appears to be very rapid. Small quantities of the cyclic tetramer were also found. The total…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and properties of high-molecular-weight step-growth polymers from bismaleimidesJerry E. WhiteCite this: Ind. Eng. Chem. Prod. Res. Dev. 1986, 25, 3, 395–400Publication Date (Print):September 1, 1986Publication History Published online1 May 2002Published inissue 1 S…