Materials Literature
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Abstract For three series of bimodal networks, the stress-relaxation rates and the tearing energies were shown to exhibit maxima at about the same concentrations of short chains as those at which the tensile strengths, reported earlier, also exhibit maxima. These findings clearly show that the reinforcement produced b…
The influence of heat treatments on the intergranular attack (IGA) and intergranular stress corrosion cracking (IGSCC) resistance of Inconel(1) 690 (UNS(2) N06690) were studied. The chromium profiles adjacent to the grain boundary were predicted by thermodynamic and kinetic modeling and benchmarked with experimental r…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymers of carbonic acid. 3. Thermotropic polycarbonates derived from 4,4'-dihydroxybiphenyl and various diphenolsHans R. Kricheldorf and Dirk LuebbersCite this: Macromolecules 1990, 23, 10, 2656–2662Publication Date (Print):May 1, 1990Publication History Published online1…
Terfenol (Tb0.3Dy0.7Fe1.9) and related materials have proven useful as electromechanical transducers. As with other transducers, these materials exhibit hysteresis, which must be included in any model of the transducer. Preisach theory is one of the available models that includes the effects of hysteresis. The theory…
Magnetic properties of melt-spun Co80Zr20−xBx microcrystalline alloys (0≤x≤8) depend crucially on the quench rate.The optimized values of Hc =2.68 kOe and (BH)max =2.10 MG Oe were obtained for Co80Zr16B4 melt-spun with the substrate surface velocity of 48 m/s. A new crystalline phase of Co5Zr was observed.
Rylene sind anellierte Arene , die formal durch Verknüpfung aller peri ‐Positionen von Naphthalin entstehen. Als Modelle für „Polyrylen”︁ 1 , R = H, wurden mehrere lösliche Oligorylene synthetisiert. Bei ihrer Charakterisierung fallen vor allem die geringe HOMO/LUMO‐Energiedifferenz des Quaterrylens 2 , R = t Bu, n =…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic and geometric structures of several states of diatomic scandium nitrideKathryn L. Kunze and James F. HarrisonCite this: J. Am. Chem. Soc. 1990, 112, 10, 3812–3825Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published inissue 1…
The 2:17 magnet alloys form a complex metallurgical system with a large number of interactive compositional and heat-treating variables. A model for the metallurgical behavior of these alloys was proposed by the author in 1983. Subsequent experiments designed to test that model have verified some aspects, significantl…
A number of photochromic spiropyrans and spirooxazines containing mesogenic groups were synthesized. Only one of them, spiro-indoline-naphthoxazine with mesogenic substituent, 4-(4-heptylbenzoyloxy)benzoyloxy in 5-position, revealed mesomorphic properties. Its phase behaviour, photochromism and alignment in the electr…
The release of cisplatin (CDDP) encapsulated in temperature-sensitive unilamellar liposomes to murine SCC VII carcinoma by localized hyperthermia and the effects of the treatment on tumor growth were studied. A transition temperature of the temperature-sensitive liposomes containing cisplatin (LIP-CDDP) was 41 degrees…
The encapsulation of liquid crystals in a polymer matrix produces a material with interesting and potentially useful optical properties. The earliest efforts generated a dispersed phase whose dimensions were comparable to optical wavelengths and therefore afforded materials which were highly scattering. These material…
An investigation of the metallurgy of a pseudobinary section of the ternary-phase diagram has been performed by means of differential thermal analysis, x-ray diffraction, and metallography. Microstructural observations and lattice parameter variations have been interpreted in terms of the existence of a solid solubili…
Abstract A commercial polycarbonate (PC)/acrylonitrile‐butadiene‐styrene (ABS) blend was reprocessed by injection molding to study the influence of reprocessing on the physical properties of the product. The modulus of elasticity and the yield stress are unaffected by reprocessing, whereas the break properties and the…
The possible relationship between skin capacitance and the mechanical properties of the skin was studied using non-invasive techniques. Skin hydration was changed by soaking skin with tap water. Hydration of the skin increased the capacitance significantly (p less than 0.01) and hysteresis (creeping phenomenon) (p les…
Abstract Morphology and properties of polymer alloys can be controlled by thermody‐namlcally reversible (structure freeze‐in) or irreversible (structure lock‐in) processes by simultaneously manipulating miscibility, mechanisms of phase separation, glass transition temperature (structural relaxation), and cure kinetics…
Fibrobacter succinogenes subsp. succinogenes S85 initiated growth on microcrystalline cellulose without a lag whether inoculated from a glucose, cellobiose, or cellulose culture. During growth on cellulose, there was no accumulation of soluble carbohydrate. When the growth medium contained either glucose or cellobiose…
Electrodeposition of various engineering metals on a platinum electrode with and without an electrosynthesized polypyrrole film was studied by cyclic voltammetry. Copper, nickel, lead, tin, and silver were readily deposited. The presence of a polypyrrole film generally reduces the plating rate and shifts the depositio…
Oxidation kinetics of diamond films synthesized by plasma-assisted chemical vapor deposition (CVD) in flowing oxygen were evaluated using thermal gravimetric analysis. The oxidation rates of diamond films, measured in the 500 to 750 °C range, were significantly lower than natural diamond, which was lower than grafoil…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCross-coupling versus homocoupling in the reactions of dimethyl(N,N,N',N'-tetramethylethanediamine)palladium with organic halidesWim De Graaf, Jaap Boersma, and Gerard Van KotenCite this: Organometallics 1990, 9, 5, 1479–1484Publication Date (Print):May 1, 1990Publication Hi…
The plasma–material interaction and high heat flux properties of beryllium are reviewed to determine its suitability as a plasma‐facing component in magnetic fusion energy reactors. Consideration is given to beryllium’s outgassing, erosion, and hydrogen retention characteristics. Its responses to normal and off‐normal…