Materials Literature
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Microtexture (i.e. grain-specific) measurements have been made from grains both before and after grain growth in an austenitic stainless steel. Such measurements allow computation of grain misorientation texture in terms of the proportions of coincident site lattice (CSL) boundaries. After 2% postrecrystallization str…
A combined experimental and numerical study is reported of melting of a pure metal inside a vertical rectangular enclosure with natural convection in the liquid and conduction in the solid. The numerical model is successfully verified by conducting a series of experiments covering a wide range of hot and cold wall tem…
The depth profile of passive layers on Fe/Cr alloys has been examined with ion scattering spectroscopy (ISS). The monolayer depth resolution of the method permits determination of a detailed Fe/Cr profile which may not be obtained with other methods. Cr is accumulated in the center of the passive film. In alkaline sol…
The relationships between target material properties and the target strength term in the analytic representation of impact is examined. For ductile materials hardness is closely related to the magnitude of the strength term. It is shown that the key parameters correlating microhardness measurements in ceramics are sim…
A variety of synthetic procedures are described that convert the trinuclear complex Mn<inf>3</inf>O(O<inf>2</inf>CPh)<inf>6</inf>(py)<inf>2</inf>(H<inf>2</inf>O) (1) into the hexanuclear complexes [Mn<inf>6</inf>O<inf>2</inf>(O<inf>2</inf>CPh)<inf>10</inf>(py)<inf>2</inf>(MeCN)<inf>2</inf>].2MeCN (2) and [Mn<inf>6</in…
Spatially periodic structures in nematic liquid crystals usually appear as the initial response to a suddenly applied reorienting field. To account for the significant discrepancy between the measured periodicity and the periodicity calculated from a linear instability analysis we derived nonlinear equations of motion…
Review: The need for a fiber with the heat resistance of asbestos and the stiffness of glass led to the development of Kevlar which has a molecular orientation parallel to the fiber axis (see figure). Brian Phillips et al. trace the many faceted course of the development of Kevlar from the initial scientific discovery…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCellulose/poly(vinyl alcohol) blends: an estimation of thermodynamic polymer-polymer interaction by melting-point-depression analysisYoshiyuki Nishio, Tatsuo Haratani, Toshisada Takahashi, and R. St. John ManleyCite this: Macromolecules 1989, 22, 5, 2547–2549Publication Date…
The self‐discharge mechanism of nickel‐hydrogen batteries using metal hydride anodes has been investigated and discussed by dividing the capacity loss during the storage in open‐circuit conditions into two parts, i.e. , reversible and irreversible ones. The reversible capacity loss was attributed to the desorption of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structures of three brilliantly triboluminescent centrosymmetric lanthanide complexes: piperidinium tetrakis(benzoylacetonato)europate, hexakis(antipyrine)terbium triiodide, and hexaaquadichloroterbium chlorideArnold L. Rheingold and Wayne KingCite this: Inorg. Chem.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTetrakis(pentafluorophenyl)porpholactoneMartin Gouterman, Robert J. Hall, Gamal Eddin Khalil, Paul C. Martin, Eric G. Shankland, and Ronald L. CernyCite this: J. Am. Chem. Soc. 1989, 111, 10, 3702–3707Publication Date (Print):May 1, 1989Publication History Published online1…
A computer simulation has been carried out to illuminate atomic processes in the fluorination of a dimerized Si(100) surface. The molecular dynamics utilizes a combination of two-atom interactions to represent the overall system potential energy. Distinctly different outcomes arise from a pair of 130-ps simulations th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase diagram of aqueous solutions of (hydroxypropyl)celluloseSuzie Fortin and Gerard CharletCite this: Macromolecules 1989, 22, 5, 2286–2292Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 May 1989https://pubs.acs.org/doi…
Review: The need for a fiber with the heat resistance of asbestos and the stiffness of glass led to the development of Kevlar which has a molecular orientation parallel to the fiber axis (see figure). Brian Phillips et al. trace the many faceted course of the development of Kevlar from the initial scientific discovery…
An analysis of a fibrous assembly at large deformations has been explored as a means of predicting the compressional behavior, especially the compression hysteresis. The essential principle is to classify all the fiber contact points in the assembly as either slipping or nonslipping, so they can be dealt with separate…
Alumina compacts fabricated with different green densities and different pore size distributions were characterized and the changes of the pore characteristics during solid‐state sintering were studied. A critical ratio of pore size to mean particle size for pore shrinkage was determined. Porosity in the compact could…
The continuing demand for polymeric materials with a unique combination of properties has brought forth a sizable research effort concerning the use of trifluoromethyl substituents, particularly the 1,1,1,3,3,3-hexafluoroisopropylidene (HFIP) function derived from the incorporation of hexafluoroacetone (HFA) into the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRevisiting kaolinite dehydroxylation: a silicon-29 and aluminum-27 MAS NMR studyJ. F. Lambert, W. S. Millman, and J. J. FripiatCite this: J. Am. Chem. Soc. 1989, 111, 10, 3517–3522Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published ini…
The critical isobar and the specific heat Cv of the N-isopropylacrylamide gel along the critical isobar have been measured. Two critical exponents were obtained from which the conventionally defined exponents are derived. Kinetics of the temperature relaxation process was also studied, which showed an anomaly near the…
Abstract The Al/Si atomic ratio of allophane was obtained from analyses of soil horizons for a range of New Zealand soils and for a wide range of volcanic soils from around the world. Imogolite‐like allophane (Al/Si = 2) occurs very frequently in soil horizons with >1 or 2% allophane, suggesting that it is more sta…