Materials Literature
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By means of lattice and molecular dynamics we study the theoretical strength of homogeneously strained, defect-free 2D crystals whose atoms interact via pair potentials with short- and longer-ranged interactions, respectively. We calculate the instability surface, i.e. the boundary in the 3D homogeneous strain space (…
Photoluminescence properties were improved in CaTiO 3 :Pr 3+ phosphor by substitution of Ba and Sr for Ca to a large extent of Ba (0–20%) and Sr (0–45%) fractions. Red emission intensity at 612 nm was greatly enhanced. It achieved its largest value in Ca 0.7 Sr 0.3 TiO 3 :Pr 3+ sample, higher by 192% than CaTiO 3 :Pr…
We give a general introduction into polarized imaging and report on a Jones pupil approach for a complete evaluation of the resulting optical performance. The Jones pupil assigns a Jones matrix to each point of the exit pupil, describing the impact of both the global phase and the polarization on imaging. While we alr…
Nanoparticles of BaZrO 3 have been prepared through a reverse micelle synthesis. The as-processed particles consisted of amorphous Ba−Zr−O and crystalline Zr 0.95 O 2 particles with an average diameter of approximately 7.5 nm. Conversion of the powders to crystalline BaZrO 3 nanoparticles occurred upon heat treatment…
Purpose To provide an efficient and robust constitutive equations for concrete ion application to high rate dynamics. Design/methodology/approach Develops an explicit‐implicit integration scheme for a concrete model. This robust integration scheme ensures computational efficiency. Comparison between simulations of imp…
The U.S. Department of Energy's (DOE) Office of Fossil Energy's (FE) National Energy Technology Laboratory (NETL), in partnership with private industries, is leading the development and demonstration of high‐efficiency solid oxide fuel cells (SOFCs) and fuel cell turbine hybrid power generation systems for distributed…
Microwave (MW) and high-intensity ultrasound (US) have emerged as powerful techniques for the elimination of persistent organic pollutants (POPs) that constitute a major health hazard, whether by direct exposure or through accumulation in biota. In order to achieve decontamination, POPs should be completely mineralize…
EPDM/PP blends were prepared by melt mixing using Brabender Plasticorder at 200°C and 100 rpm. The curative concentration was progressively increased from 1 to 3.5 phr EPDM in order to study the influence of dynamic vulcanization on the mechanical properties of the blend. The effectiveness of dynamic vulcanization was…
In this work, the thermal shock behavior of an Al2O3-5%tZrO2/Al2O3-30%mZrO2 multilayer ceramic is studied. On these materials, a tetragonal to monoclinic phase transformation within the Al2O3-30%mZrO2 layers takes place when cooling down from sintering. The latter induces an increase in volume and therefore compressiv…
We investigate effects of cation (K, Ca, Sr, Ba, La, Bi, Tl, Ag) substitution at Pb-site in $\mathrm{Pb}{\mathrm{Fe}}_{1∕2}{\mathrm{Nb}}_{1∕2}{\mathrm{O}}_{3}$ (PFN) on its diffuse ferroelectric phase transition (DPT) through measurements and modeling of the temperature dependence of its dielectric constant. We find t…
A liquid crystal (LC) negative lens is realized using a two-voltage-driving system. The focal length of the lens is tuned electrically. The properties of the lens are calculated and measured. The LC lens has a very wide focus range, and it preserves its optical quality over the entire range.
Abstract A spin crossover (SC) FeIII complex, [FeIII(4-NH2py)L]BPh4, was synthesized and characterized, where 4-NH2py = 4-aminopyridine, H2L = pentadentate N3O2 Schiff-base ligand of the 2:1 condensation product of 3-methoxysalicylaldehyde and bis(3-aminopropyl)methylamine, and BPh4− = tetraphenylborate. Cryomagnetic…
Segregation of alloying and impurity elements to grain boundaries in ferritic steels and alloys is known to modify the mechanical properties. This paper considers segregation of such elements, in particular phosphorus and carbon, that occur in ferritic nuclear pressure vessel steels subject to neutron irradiation and…
Cobalt (4) and iron (5) phenylthio-substituted phthalocyanines ( MPc ( SR ) 8 ) have been synthesized and characterized. Cyclic square wave voltammetry in dimethylformamide containing tetrabutylammonium perchlorate revealed five and six redox processes, respectively, for complexes 4 and 5. The complexes are easier to…
There is a growing consensus that materials become stronger in small volumes and in the presence of large strain gradients. It has not been clear whether this is due to increased resistance to the motion of dislocations, fewer dislocations, or increased difficulty of multiplying dislocations in these situations. A cla…
Super high modulus polyethylene fibers can be created by converting high molecular weight flexible PE chains into highly oriented and extended chain conformations. However, unlike polyethylene, aliphatic polyamides have very high cohesive energy and therefore cannot be easily drawn and highly oriented. This review add…
This paper reports some of our initial works in pursuit of a simple and low-cost method of fabricating all-organic electrochemical diodes, triodes, and transistors on flexible plastic or paper substrates. Conducting polymer poly(3,4-ethylenedioxythiophene) poly(styrene sulfonate) (PEDOT : PSS), utilized as an active c…
An aqueous extract of the plant material rhizome (Curcuma longa L.) powder has been used as a corrosion inhibitor in controlling corrosion of carbon steel immersed in an aqueous solution containing 60 ppm of Cl–, by the mass-loss method, in the absence and presence of Zn2+. The main constituent of this plant extract i…
Both diethylenetriaminepentaacetic acid (DTPA) and sulfadiazine (SD) were incorporated into polyaspartamides with different side chains, including poly-alpha,beta-[N-(2-hydroxyethyl)-L-aspartamide] (PHEA), poly-alpha,beta-[N- (3-hydroxypropyl)-L-aspartamide] (PHPA), poly-alpha,beta-[N-(2-aminoethy1)-L-aspartamide] (PA…
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