Materials Literature
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Stress-induced perturbation of the antiferromagnetic long-range order in epitaxially grown (111) Cr2O3 thin films gives rise to pronounced piezomagnetism and a significant reduction of the antiferromagnetic ordering temperature. The temperature dependence of the piezomagnetic moment measured by superconducting quantum…
Using a surface force apparatus, we have measured the normal forces between mica surfaces across various types of nanoparticles consisting of ZnS cores coated with a monolayer of physisorbed surfactant, dispersed in organic solvents. We focused on the effects of nanoparticle size, shape, and concentration on the force…
In this paper, we investigate the impact of process variations on future interconnect solutions based on single-walled carbon nanotubes (SWCNT) bundles. Leveraging an equivalent RLC model for SWCNT bundle interconnect, we calculate the relative impact of ten potential sources of variation in SWCNT bundle interconnect…
The paper provides an overview of processes and underlying physics governing tungsten melt erosion in the fusion plasma environment. Experiments with three different bulk tungsten test-limiters were performed in TEXTOR: (i) thermally insulated solid plate fixed on a graphite roof-like limiter heated up by the plasma t…
Abstract The effect of different silica treatments on the vulcanization of silica filled Styrene Butadiene Rubber (SBR) is investigated. The concentration, the length and the functionality (coupling or non coupling) of the silane used for this treatment are the parameters studied. It is shown that the silane grafting,…
Nanoporous, high-surface area films of TiO 2 are synthesized by reactive ballistic deposition of titanium metal in an oxygen ambient. Auger electron spectroscopy (AES) is used to investigate the stoichiometric dependence of the films on growth conditions (surface temperature and partial pressure of oxygen). Scanning a…
We consider the semilinear Duhem model and develop an identification method for rate-independent and rate-dependent hysteresis. For rate-independent hysteresis, we reparameterize the system in terms of the input signal, so that the system has the form of a switching linear time-invariant system with ramp-plus-step for…
Abstract The plasticized poly(vinyl chloride) (PVC‐P) and its blend with cellulose (PVC‐P/cell) were prepared by means of extrusion. The samples were then biodegraded in forest soil as well as in soil enriched with cellulolytic microorganisms. Moreover, the samples were vaccinated with chosen species of fungi whose di…
Nanocomposites may realize a similar thermal conductivity reduction and thermoelectric efficiency enhancement observed in superlattices and thus provide a pathway to scale up the benefits of the nanoscale effects to thermoelectric materials in bulk form. If there are two species, nanocomposites can be in the form of n…
Abstract A “Chemical one step method” (COSM) is proposed to prepare electromagnetic functional composite nanofibers of polyaniline (PANI/ γ ‐Fe 2 O 3 ) having a diameter of ≈20 nm. In this approach FeCl 3 is acts as the oxidant either for polymerization of aniline or for preparation of γ ‐Fe 2 O 3 magnets. Besides, it…
It is believed that the dynamics of dislocation processes during the deformation of nanocrystalline materials can only be visualized by computational simulations. Here we demonstrate that observations of dislocation processes during the deformation of nanocrystalline Ni with grain sizes as small as 10 nm can be achiev…
Mesoporous nanocrystalline zirconia with a high surface area and pure tetragonal crystallite phase has been prepared by the surfactant-assisted route, using a Pluronic P123 block copolymer surfactant. The synthesized zirconia showed a surface area of 174 m 2 g - 1 after calcination at 700 °C for 4 h. X-ray diffraction…
It is important for many industrial processes to design new materials with improved selective permeability properties. Besides diffusion, the molecule's solubility contributes largely to the overall permeation process. This study presents a method to calculate solubility coefficients of gases such as O2, H2O (vapor),…
In this work we have developed a comprehensive dynamic model of electron beam induced deposition (EBID) of residual hydrocarbon coupling mass transport, electron transport and scattering, and species decomposition to predict the deposition of carbon nanopillars. The simulations predict the local species and electron d…
Novel conjugated azomethines consisting uniquely of thiophene units are presented. The highly conjugated compounds were synthesized by simple condensation of a stable diamino thiophene (2) with its complementary thiophene aldehydes. These interesting nitrogen-containing thiophene units exhibit variable reactivity lead…
The unsaturated polyester resin based sisal/glass hybrid composites were developed using the hand lay-up technique. Chemical resistance tests of these hybrid composites were performed in order to probe whether these composites can be used for making articles that are resistant to chemicals. The hybrid samples and the…
This paper presents a thorough investigation of the continuous extrusion foaming of amorphous poly(lactic acid) (PLA) using carbon dioxide (CO 2 ) as the blowing agent. Detailed results describing the plasticization induced by CO 2 dissolution as measured from two different methods, on-line rheometry and in-line ultra…
Abstract Ti and Mn‐doped MgAl 2 O 4 spinel have been successfully grown by the micro‐pulling‐down method and spectroscopic properties have been investigated in view of the potential use as a short‐wavelength tunable solid‐state laser. Strong blue emission is observed from Ti‐doped MgAl 2 O 4 and green emission from a…
The recent discovery of high-temperature piezoelectric ceramics based on Bi(Me′Me″)O3-PbTiO3 solutions have also permitted the development of high-temperature relaxor ferroelectrics with ternary solid solutions. One of the high-temperature compositions based on the xBiScO3-yPb(Mg1∕3Nb2∕3)O3-zPbTiO3 (xBS-yPMT-zPT) tern…
The objective of the present study was to investigate the spark plasma sintering technology when a pure coarse aluminium powder is used. In order to understand the process, different conditions of temperature, current flow through the sample, pressure and delay at which the pressure is applied were investigated to cla…