Materials Literature
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Electromagnetic wave propagation is first analyzed in a composite material mde of chiral nano-inclusions embedded in a dielectric, with the help of Maxwell-Garnett formula for permittivity and permeability and its reciprocal for chirality. Then, this composite material appears as an homo-geneous isotropic chiral mediu…
Some silyl monomers and polymers of styrene that have several sterically hindered group were synthesized, and modification of them was studied. We showed that the glass-transition temperature (T g) and the solubility of polymers were modified. In this work, we synthesized 1,2-bis(vinylphenyl)ethane (BVPE) as a cross-l…
A new method of measuring specular X‐ray reflectivity curves with a time resolution of milliseconds to seconds is developed. A horizontally convergent X‐ray beam having a one‐to‐one correlation between its direction and energy is realized by a curved crystal or a laterally graded multilayer on an elliptic substrate. T…
Research on ammonia borane (AB, NH3BH3) has shown it to be a promising material for chemical hydrogen storage in PEM fuel cell applications. AB was selected by DOE’s Hydrogen Storage Engineering Center of Excellence (HSECoE) as the initial chemical hydride of study because of its high hydrogen storage capacity (up to…
A self-adaptive thermal switch array (TSA) based on actuation by low-melting-point alloy droplets is reported to stabilize the temperature of a heat-generating MEMS device at a predetermined range (i.e., the optimal working temperature of the device) without any control circuit or electrical power consumption. When th…
Layers of a high quality GaN and AlGaN/GaN heterostructure were grown on (111)-oriented silicon substrate by inserting several thin InN interlayers during the transition-layer growth, which turned out to be very effective in decreasing the dislocation density in the grown GaN films. The full width at half-maximum of (…
Recently there have been initial investigations towards magnetic resonance imaging (MRI) guided actuation and control of untethered devices inside the human cardiovascular system. This form of therapy has the potential to revolutionize today’s treatment of cancer and other diseases by providing an accuracy of targeted…
The nonvolatile memory thin film transistors (MTFTs) using a solution-processed zinc indium oxide (ZIO) active channel and a poly(vinylidene fluoride-trifluoroethylene) ferroelectric gate insulator was proposed and characterized. The spin-coated ZIO films showed good transmittance in the visible range. The crystalline…
Aluminum tri-hydride (AlH3) is promising as a hydrogen storage material. Hydrogenation and dehydrogenation mechanism of aluminum still remain unclear and fundamental study of the Al-H system is required to utilize AlH3 as a practical hydrogen storage material. Aluminum is hydrogenated under high pressure and high temp…
The Fourier transform method has highest frequency resolution but the lowest space resolution, which results in the fundamental spectrum at one position overlapping with higher spectrum at other positions. In order to balancing the frequency and space resolution, an adaptive multiscale windowed Fourier transform techn…
The U.S. Nuclear Regulatory Commission (USNRC) has recently approved Relief Requests for the use of high density polyethylene (HDPE) piping in safety-related applications. The ASME Boiler and Pressure Vessel Code, meanwhile, has developed Code Case N-755 that defines the design and service life requirements for PE pip…
In this study, the inelastic deformation behavior of Veriflex-E, a thermally-triggered shape memory polymer resin, was investigated. The experimental program was designed to explore the influence of strain rate on monotonic loading at various temperatures. In addition, the creep behavior of specimens at various temper…
When one side of the surface-modified ZrNi amorphous alloy membranes was hydrogen charged cathodically, the membrane with Pd plating bent rapidly with an increase in the hydrogen charging time. It was also found that the bending disappears completely when hydrogen gas was released from the specimen by heating. The rep…
Using acetylene black as an assistant reagent in the ammonia atmosphere, one dimensional (1D) hexagonal single crystalline aluminum nitride (AIN) nanowires were successfully synthesized via carbothermal reduction and nitridation method. With smooth surface and uniform diameter, the wool-like product of AIN nanowires g…
We investigate numerically the interaction between two sessile droplets with different perfectly miscible liquids. This application is motivated by recent experimental observations showing that for sufficiently small contact angles, a temporary non‐coalescence can occur after a lateral contact between drops [H. Riegle…
The mechanical properties of hypereutectic Al-Si alloys are mainly determined by size and morphology of the primary silicon phase.So,optical microscopy(OM) and X-ray diffraction(XRD) were adopted to study affection of Nd on primary silicon of hypereutectic Al-15%Si alloy in this paper.The results of OM showed that pur…
We investigate the small amplitude oscillatory shear permeation flow (SAOSPF) of cholesteric liquid crystal polymers (CLCPs) using a mesoscopic model obtained from the Doi kinetic theory for flows of CLCPs. We model the system by Stokes hydrodynamic equations coupled with orientational dynamics and study the frequency…
In order to satisfy performance and long life requirements for hot forging die, Ni60-SiC cermet coating was prepared on the high speed steel W6M05Cr4V2by plasma cladding technology. Metallurgical bonding coating with enough bonding strength was obtained after optimizing the cladding parameters. The clad coating compos…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation D. Rouchon, L. Becerra, O. Renault, K. Kaja, D. Mariolle, N. Chevalier; Raman Spectra and Imaging…
Recent research results indicated that eddy current conductivity measurements might be exploited for nondestructive evaluation of subsurface residual stresses in surface‐treated nickel‐base superalloy components. This paper presents new results that indicate that in some popular nickel‐base superalloys the relationshi…