Materials Literature
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The effect of gravity on the contact angle was calculated using a precise drop shape model. The drop shape, whose surface curvatures change under the influence of gravity, was calculated following Laplace's equation. The total free energy of the three interfacial free energies and the potential energy of the drop were…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMoving-Bed Reactor Model for the Direct Reduction of Hematite. Parametric StudyEnrique D. Negri, Orlando M. Alfano, and Mario G. ChiovettaCite this: Ind. Eng. Chem. Res. 1995, 34, 12, 4266–4276Publication Date (Print):December 1, 1995Publication History Published online1 May…
Abstract Polypropylene (PP) composites containing 0.30 vol% of talc filler, in addtion to blends modified with an ethylene‐propylene copolymer (EPR) elastomer were prepared and their fracture resistance was determined by the standard Ixod impact test and by a fracture mechanics technique. Effects of composition, type…
Leather tanning industry as a significant polluting source is exposed to stringent effluent limitations. On the other hand, leather processing has a very complex structure in terms of both production and waste streams. A systematic subcategorization approach is required to assess the pollution characteristics and cont…
Abstract Proteins (catalase, albumin, pepsin and lysozyme with different molecular weights and isoelectric points) were differently adsorbed at pH 7.0 on the clay fraction of three raw Na-saturated smectites (Crook and Uri montmorillonites and one hectorite). The adsorption isotherms of proteins on clay minerals showe…
Abstract The degree of crystallinity in polymers is commonly known to significantly affect their mechanical properties. To that extent, it also affects the mechanical properties—such as compression, buckling, and creep—of thermoplastic composites that are matrix dominant. For this reason, it is important that the degr…
We report the kinetics of crystallization as observed in simulations of a charged colloidal suspension under shear. We find that the imposed shear flow inhibits crystal nucleation. Crystallization was only observed for shear rates at or below \ensuremath{\gamma}\ifmmode \dot{}\else \.{}\fi{}${\mathrm{\ensuremath{\tau}…
Abstract. The displacive transformation classification proposed at ICOMAT 79 [I] is reviewed in light of recent progress in mechanistic understanding. Issues considered include distinctions between shuffle transformation vs. self-accommodating shear, dilatation vs. shear-dominant transformation, and nucleated vs. cont…
Cu-Al-Mn shape memory alloys with enhanced ductility have been developed by decreasing the degree of order in the β parent phase. Cu-Al-Mn alloys with Al contents lower than 18% exhibit good ductility with elongations of about 15% and excellent cold-workability arising from a lower degree of order in the Heusler (L21)…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTSynthesis and Photoluminescence of Weblike Agglomeration of Silica NanoparticlesM. S. El-Shall, S. Li, T. Turkki, D. Graiver, U. C. Pernisz, and M. I. BaratonCite this: J. Phys. Chem. 1995, 99, 51, 17805–17809Publication Date (Print):December 1, 1995Publication History Published…
The space charge behavior such as charge distribution and electrical conduction of maleic anhydride grafted LDPE (LDPE-g- MAH) was investigated. Heterocharge was found in LDPE and it decreased with increasing MAH graft ratio in LDPEg- MAH. Conduction currents also decreased with increasing MAH graft ratio. The relatio…
The consistencies among the reported univariant hydrogen pressures in the three two‐phase regions of the Zr‐H system, aZr/δZrH 2‐x αZr/βZr, and βRZr/δZrH 2–x , are evaluated with the thermodynamic constraint derived by Speiser. 16 Hydrogen dissolution in αZr is evaluated by checking the consistencies among the Sievert…
This paper deals with the possibilities of noise suppression in partial discharge (PD) measurements under on-site conditions. After the presentation of previous work, a new concept of designing a digital FIR filter with a fixed order to suppress narrow-band disturbances will be presented. The method will be compared t…
Ternary alloys of NiTiHf, having higher transformation temperatures than binary NiTi shape memory alloys, have been produced and analyzed. Beginning with a base composition of Ni49Ti51’, Hf was substituted for Ti up to 30 atomic percent. Differential scanning calorimetry was used to determine the transformation temper…
Abstract The anionic ring‐opening polymerization of L‐lactide was initiated by dipotassium‐poly‐isobutylene‐alcoholate telechelic polymer to yield poly( L ‐lactide)‐ block ‐polyisobutylene‐ block ‐poly( L ‐lactide) triblock copolymer, a partially biodegradable thermoplastic elastomer. The pure triblock copolymer was o…
The intrinsic 1.9-eV photoluminescence band (the R band) in neutron-irradiated synthetic silica glass has been studied using site-selective photoluminescence excitation in the 2.0 eV absorption band and transient spectral hole-burning techniques. The measurements of the low-energy wing of the zero-phonon line intensit…
The effects of atomic-scale voids on the strength and mechanical behavior of aluminum at zero temperature are investigated using the total-energy pseudopotential method. A series of calculations are performed in which the defective system is extended by a small increment and then is relaxed to its ground state configu…
Structure factors for synthetic yttrium orthoferrite, YFeO 3 , measured with MoKα (λ = 0.71073 A) X-radiation and using a smaller crystal with focused λ = 0.75 A synchrotron radiation are broadly consistent. Approximate symmetry in concordant difference densities indicates that cations deform the electron density more…
This study was conducted to determine water sorption isotherms of cellulose‐based films made from methyl cellulose (MC) and hydroxypropyl cellulose (HPC), and to evaluate the effect of plasticizer concentration and temperature on water vapor permeability coefficient in those films. the equilibrium moisture contents of…
A new technique for producing hollow shell laser fusion fuel capsules has been developed that starts with a depolymerizable mandrel. In this technique we use poly(α-methylstyrene) (PAMS) beads or shells as mandrels which are overcoated with plasma polymer. The PAMS mandrel is thermally depolymerized to gas phase monom…