Materials Literature
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The Large Burn Laboratory, located at the FM Global Research Campus, is the first facility in which calorimetry techniques have been become a standard means of evaluating both sprinklered and non-sprinklered fire tests. The geometry and dimensions of the new facility result in signal distortions which are not typicall…
Woven polypropylene fabrics were impregnated with hydroxy-anthraquinone (HAQ) derivatives compounds by supercritical carbon dioxide where the HAQ worked as a dyestuff. The HAQ-impregnated fabrics were tested to adsorb metal ions dissolved in water forming the “dye-metal chelate” under specific conditions of pH for one…
The geometric and electronic local structure of LaMnO3 across the cooperative Jahn–Teller (JT) transition at TJT = 750 K has been studied by means of X-ray Absorption Near Edge Structure (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) at the Mn K-edge. XANES spectra, as a function of temperature, do not s…
Magnetostrictive bulk Fe–17 at%Ga alloy was fabricated by combining laminates of rapid-solidified ribbons (80 μm in thickness) using the spark plasma sintering/joining (SPSJ). The SPSJ is characterized by a short time, low temperature heating and sintering process. The laminated sample made by the SPSJ maintained a un…
This study examined a sample-preparation procedure in the glow-discharge mass analysis of yttria-stabilized zirconia (YSZ). We investigated a procedure for mixing it with high-purity gallium to guarantee the electrical conductivity. Several chips of single-crystal specimens were placed in the center of a homemade PTFE…
Derivatives of N‐phenyl pyrrole with a para‐donor substituent on the acceptor benzene ring are compared. It is shown that by a suitable increase of the donor strength of the pyrrolo group, CT fluorescence can be achieved even for donor‐donor substituted benzenes. On the other hand, introducing fluoro substituents into…
Structural changes of pyromellitimido-oxydianiline (PMDA-ODA) polyimide (PI) films by UV irradiation were studied by means of XAFS and XPS. UV irradiation in air was found to cause oxidative cleavage of the imide ring of the PMDA part, whereas that in vacuum changed the conjugated structure involving nitrogen but did…
The author studies the convective Cahn–Hilliard equation. Some results on the existence of classical solutions and asymptotic behavior of solutions are established. The instability of the traveling waves is also discussed.
We report the synthesis and successful testing of solution phase, near‐infrared sensors, using single walled carbon nanotubes that modulate their emission in response to the adsorption of specific biomolecules. Non‐covalent functionalization using electron withdrawing molecules are shown to provide sites for transferr…
A stacked‐foil method was used to study the cross section of the Ti(p,X)44Ti, Ni(p,X)56Ni and Zr(p,X)88Zr reactions with energies up to 30 MeV. Natural targets of Ti, Ni and Zr were irradiated with a 30 MeV proton beam and the products were measured by residual activity using a germanium hyper‐pure detector with energ…
Internal friction Q–1 and Young‘s modulus E were measured as functions of temperature for undoped Pb(Zr0.65Ti0.35)O3 ceramics obtained by the sol-gel technique. Experiments were performed with a RAK-3 resonant mechanical spectrometer. The E(T) curves show two anomalies associated with two peaks, PR and PF, in the Q–1(…
Materials scientists are facing unprecedented challenges in many areas, such as energy conversion and storage, microelectronics, telecommunication, display technologies, catalysis, and structural materials. Experimental methods generate increasing amounts of data. New computational methods, highperformance computer ha…
Temperature modulated alternating differential scanning calorimetric studies show that Se rich Ge0.15Se0.85−xAgx (0 x 0.20) glasses are microscopically phase separated, containing Ag2Se phases embedded in a Ge0.15Se0.85 backbone. With increasing silver concentration, Ag2Se phase percolates in the Ge–Se matrix, with a…
Chemical vapor deposition was used to synthesize CdS nanowires via the vaporliquid-solid growth mechanism. After Ti/Au contacts were patterned to the nanowires using electron beam lithography, photoresponse studies were conducted. A significant response was observed when the wires were exposed to visible light; this o…
The surface of superfine boron powder was coated with lithium fluoride prepared by reacting LiOH with HF by the neutral precipitation method. The effect of the concentration of LiOH solution on the coating effectiveness of superfine boron particles was studied. Transmission Electron Microscope, rotary viscometer and X…
The desorption spectrum of NO adsorbed on the surface of TiO2 powder was determined by temperature programmed desorption. The molecular orbital theory was u tilized to investigate the crystal cluster model of NO adsorbed on TiO2 and th e change of band gap in the adsorption process. The results indicate that there exi…
Previous results have shown that the plasma-chemical hybrid process was effective for simultaneous removal of NOx, SOx and diesel particulate. In the present study, two types of plasma supplies, the direct oxidation method and the indirect plasma oxidation (air radical injection) method, were evaluated with regard to…
Transparent polycrystalline ceramics of with a composition of were successfully fabricated from nanosized powders obtained by a combustion method. The resulting ceramics sintered in atmosphere at 1850°C for 6 h have a near-pore-free structure and are composed of uniform grains with an average size . The obtained ceram…
Negative tone patterns were created by polymer-contamination writing in a transmission electron microscope. Typical line edge roughness of the polymer lines was found to be below 1nm. The patterns were transferred to bismuth films using an anisotropic ion etch, resulting in final bismuth line edge roughness less than…
Cast duplex stainless steels of CF8M and CF8 are used in major components because of their superior characteristics, such as corrosion resistance, weldability, and so on. However, these stainless steels are known to have tendency of thermal aging embrittlement after long term service. Therefore, the mechanical propert…