Materials Literature
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In the event of high-energy penetrator impact, people involved in battlefield scenarios are exposed to the additional hazard stemming from ultrafine metallic particles, i.e. exposure, inhalation, and respiration of aerolized metals. In order to have reliable quantitative measurement of the aerosol particles generated…
By using butyl titanate as the main material, the nano-TiO2/μm-SiC composite particles were prepared in acidic abundant aqueous solution at low temperature. The properties of the composite particles, including surface morphology, the phase composition of the coating layer, were characterized by SEM, XRD and XPS. The r…
The physical and mechanical properties of nanometer ZrO 2 -ZrO 2 fiber composite ceramics were studied by introduction of ZrO 2 fiber. ZrO 2 composite ceramics at different sintering temperature was investigated by porosity and water absorption measurements, flexual strength and thermal shock resistance analysis. Resu…
Mechanisms for fabrication of carbon nanomaterials by arc discharge in low-temperature liquid such as liquid helium has been investigated. In particular, bubble behavior at the arc discharge using open and close discharge. When electrodes were closed, small light emission appeared with bubbles. Then, the emission inte…
Author(s): Van Blarigan, Andrew Charles | Advisor(s): Dibble, Robert W | Abstract: This work investigates oxycombustion in a spark-ignited (SI), piston engine. Oxycombustion is the process in which nearly pure oxygen and fuel are burned in a diluent of exhaust gas which is recirculated from the exhaust to the intake,…
The Al2O3-Supported Ni Catalyst was prepared by chemical reduction method, and take benzaldehyde as catalytic hydrogenation model to explore the effect in catalytic hydrogenation of benzaldehyde at different time and temperatures. The results show that the best temperature is between 60°Cand 80°C, and the catalytic ti…
A new polycarboxylate superplasticizer (NPC) was synthesized by radical copolymerization of maleic anhydride (MAH), sodium methylacryl sulfonate (MAS), allyl polyethylene glycols (APEG), and β-cyclodextrins grafted maleic anhydride (MAH-β-CD) using ammonium persulfate (APS) as initiator. The effect of feeding mode and…
Heterogeneous catalysis is of outermost significance in many fields of gas conversion and processing in chemical industries. Accurate modeling of intra-particle heat and mass transport is a prerequisite for the design of many industrial processes and the interpretation of experiments. In recent literature, deviations…
We report on the electrical transport properties of buckled carbon nanotube arrays synthesized by pyrolysis. Analyzing the experimental data based on the general theory of semiconductors, the arrays are predicted to be semiconducting and the band gap can be evaluated. The band gap of different arrays is in 25-50 meV r…
A design of dual band amplifier using composite right/left handed (CRLH) transmission line structure is described. First, two single-band matching networks are designed for two frequencies, and they are synthesized into one dual band matching network. It is shown that CRLH transmission lines with arbitrary dual freque…
This work investigates energetic materials based on nanoporous silicon fuel impregnated with sodium perchlorate oxidizer. The nanoporous silicon samples were prepared by anodization of silicon in a hydrofluoric acid solution, and the influence of the electric current density on the nanoporous structure was studied. Th…
With the high-Tc cuprates in mind, properties of correlated d-wave superconducting (SC) states are studied for a Hubbard model on square lattices with a diagonal transfer (t-t’-U model), using a variational Monte Carlo method. We employ a simple wave function, which includes crucial parameters, in particular, a doublo…
We report the magnetic properties of graphene oxide (GO) and reduced graphene oxide (RGO). We observe increase in coercivity upon reduction of GO and also for both the sample we observe increase in coercivity with increase in temperature which seems unusual. However, the increase in coercivity as a function of tempera…
The present work describes the effect of hydraulic alumina (HA) as both a new inorganic binder for extrusion and a sintering additive for silicon nitride (Si3N4) ceramics. The addition of small amount of HA imparted flowability and rigidity to the Si3N4 bodies, and could reduce the amount of use of the conventional or…
SUMMARY We report on observations of a laser-induced shock in a sessile water drop and the interaction of the shock and material interfaces. A short laser pulse is focused into a water drop on a glass surface and images of the shock-interface interaction are captured using a CCD camera with very short exposure times.…
A home-made Ion Beam Sputtering (IBS) system has been developed in our laboratory. Using the IBS system single layer W and single layer C film has been deposited at 1000eV Ar ion energy and 10mA ion current. The W-film has been characterized by grazing Incidence X-ray reflectrometry (GIXR) technique and Atomic Force M…
Hydrogenated amorphous carbon (a-C:H) films were deposited on rubber surface by plasma-enhanced chemical vapor deposition (CVD), using a non-equilibrium atmospheric pressure plasma torch. The effects of oxygen, in the deposition atmosphere, on the chemical and mechanical characteristics of a-C:H films were investigate…
We have studied the electronic structure within the topmost two quintuple layers (QL) on vacuum-cleaved n- and p-type Bi2Te3(111) at 10 K by angle-resolved photoelectron spectroscopy. Tunable synchrotron radiation maximized the surface sensitivity of photoelectrons. The gapless surface-state band (SSB) in the angle-re…
Zr,Ga co-doped ZnO transparent conductive films were deposited on glass substrates by DC magnetron sputtering at room temperature.The influence of sputtering pressure on the structural,electrical,and optical properties of Zr,Ga co-doped ZnO films was investigated by X-ray diffraction,scanning electron microscopy (SEM)…
In this paper, a radial basis function neural network (RBFNN) is designed and used for such purpose. The network is used in conjunction with a self-tuning PID controller. The differential equation of Jenkine element is adopted for hysteresis modeling. The simulation results show that the proposed controller improves t…