Materials Literature
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Abstract Changes occur in the structure of drawn polyethylene when it is annealed at temperatures close to that of the drawing process. Measurements have been made of the oxygen barrier properties and of the thermal expansion coefficient in the draw direction on samples over a wide draw ratio range both before and aft…
Grain boundary dislocation (GBD) structures in symmetric [001] tilt boundaries in Al bicrystals of controlled geometry have been studied using transmission electron microscopy. The intrinsic GBD structure of near-Σ1, Σ5 and Σ13 boundaries consisted of families of straight edge GBDs with Burgers vectors b=〈100〉 or 1/2〈…
Abstract The title compound was synthesized in three steps from ethoxycarbonylformamide oxime (5) and 3,4,6‐tri‐ O ‐acetyl‐2,5‐anhydroallonyl chloride (4b) in 62% overall yield. An acid catalyzed de‐esterification was required to prevent a facile base catalyzed elimination reaction.
A new plate impact technique for studying the dynamic properties of shock-damaged materials has been developed. The technique is based on impacting the specimen with two flyer plates which are separated by a small gap. Impact of the first plate causes spall in the target. Impact of the second plate closes the spall. T…
During irradiation, dislocation loops, bubbles and voids are often formed in crystalline materials. The presence of these defects gives rise to irradiation hardening. At elevated temperatures, the strength may be dictated by the balance between the rate of creation of these defects by irradiation and their rate of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkali-metal intercalates of layered yttrium chloride oxide and their hydration reactionsJeff E. Ford and John D. CorbettCite this: Inorg. Chem. 1985, 24, 24, 4120–4128Publication Date (Print):November 1, 1985Publication History Published online1 May 2002Published inissue 1…
Abstract Various 4‐ and 4′‐substitued trans ‐ N ‐benlizylidenanilines were synthesized and their 1 H NMR spectra recorded at 30 °C in DMSO‐ d 6 , and acidic media (TFA‐ d and D 2 SO 4 ). The effects of substituents on the chemical shifts of H‐α (proton on carbon of imine group) and H‐2′ (protons on benzaldehyde ring o…
This paper reviews some of the important processes underlying high temperature degradation of structural materials used in the petroleum and petrochemical industries. Particular emphasis is palced in degradation processes involving the interaction of structural metals and alloys with environments containing sulfidizin…
This paper describes the development of several inorganic-based, non- halogenated, intumescent flame retardant additives for organic polymers. Low melting phosphate-sulfate glasses, borate/carbonate glass forming systems and ammonium pentaborate are discussed with respect to their role in converting otherwise flammabl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-assembling of spiropyran polymers by zipper crystallizationTmima Wismontski-Knittel and Valeri KrongauzCite this: Macromolecules 1985, 18, 11, 2124–2126Publication Date (Print):November 1, 1985Publication History Published online1 May 2002Published inissue 1 November 19…
Jar tests and a circulating water system were used to evaluate the effect of water quality parameters, in particular the Langelier index (SI), on the corrosion of galvanized steel. Since waters with a positive SI were sometimes found to be at least as corrosive as waters with a negative SI, especially if the effect of…
The relative stress corrosion cracking (SCC) susceptibility of heat-treated AISI 316 nuclear grade (NG) and 316 stainless steel (SS) has been investigated by means of constant extension rate tensile (CERT) tests over a range of strain rates from 10−5 to 10−7 s−1 in simulated boiling water reactor (BWR) environments th…
Dopant‐free calcium aluminate glasses are very sensitive to ultraviolet radiation; new optical absorption bands rapidly appear around 400 nm on illumination and are easily bleached when the glass is heated to >100° to 250°C. This coloringbleaching process is reversible when the illumination and heating cycles are r…
Tantalian niobian titanite occurs in the IRA pegmatites on the Irgon claim, in the Winnipeg River pegmatite field of southeastern Manitoba. This titanite is a rare early component of a secondary mineral assemblage in miarolitic cavities in the albite. It occurs as dull brown fan-shaped (<l mm) aggregates of prismatic…
For a few glass-forming metallic systems whose specific heat is known for both the crystal and the liquid phase, together with the heat of fusion, the thermodynamic quantities trapped at the glass transition T g have been computed by extrapolation of the liquid data. The difference in enthalpy ΔH g is reasonably well…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and mechanisms of platinum(II)-promoted hydrolysis of inorganic polyphosphatesRathindra N. Bose, Richard D. Cornelius, and Ronald E. ViolaCite this: Inorg. Chem. 1985, 24, 24, 3989–3996Publication Date (Print):November 1, 1985Publication History Published online1 Ma…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation L. Stockert, F. Hunkeler, H. Bohni; Technical Note: A Crevice-Free Measurement Technique to Determine Repro…
Preferential or selective chemical vapor deposition to a substrate region is based on a difference in thermochemical stability between different substrate regions. The higher this difference is, the higher selectivity is expected. In this paper a thermodynamic analysis of selective deposition of tungsten from H2 and W…
The Raman spectrum of ferroelectric PbHPO4 (TC∼310 K) has been measured at temperatures between 10 and 320 K in the frequency region 10–3200 cm−1. Mode assignments have been made, which are consistent with the m(Cs) point-group symmetry of the ferroelectric phase. From examination of the correlation field splittings,…
Abstract Dipolar splittings with a quadratic dependence on static magnetic field strength are reported for selected pairs of nuclei in several porphyrins. These splittings are detectable as a result of a slight molecular alignment caused by the interaction of the static magnetic field with the anisotropic magnetic sus…