Materials Literature
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Characterization of the Inlet Combustion Air,” National Inst. of Standards and Technology,NISTIR 6370, Gaithersburg, MD, July 1999. 7“American National Standard for Expressing Uncertainty—U.S. Guide for the Expression of Uncertainty in Measurement,” National Conf. of Standards Lab., American National Standards Inst./N…
The formation of vacancy-type defects in La-doped lead zirconate titanate (PLZT) thin films (Zr/Ti=20/80) was studied as a function of lanthanum doping and after cooling in an oxygen-reduced ambient. The changes in the Doppler-broadening S parameter are consistent with the progressive introduction of Pb-vacancies upon…
The drive towards dry vacuum pumping has occurred across the spectrum of vacuum applications from semiconductor manufacture to industrial processing. This brings with it a need to systematically evaluate and quantify the degree of cleanliness characteristic of any particular pump; currently, there is no universally ac…
Thermal degradation of polyvinyl chloride (PVC) and the effect of dichlorotin dioxine (DCTD) on this process have been investigated using dehydrochlorination (DHCl) and thermogravimetric techniques. A significant decrease in the rate of degradation was observed when PVC was mixed with a small amount which was maximum…
The reactions between NO and CO adsorbed on Rh(100) were studied with temperature programmed reaction spectrometry and static secondary ion mass spectrometry and compared with similar reactions on Rh(111). Elementary steps in the overall reactions, such as dissociation of NO, and reaction between CO and O atoms were s…
Although copper damascene interconnects offer many advantages over conventional subtractive etched Al alloys, the challenges and costs associated with converting to copper have combined to extend the useful life of Al alloy etching into the deep submicron regime. As a result, metal masking and etching are facing new c…
ABSTRACT The Naval Surface Warfare Center Dahlgren Division has investigated technology for the Office of Naval Research (ONR) that has the potential to be very effective in defending Navy platforms against high‐speed, sea‐skimming anti‐ship cruise missiles (ASCMs). This technology uses a new kill mechanism, a wall of…
The ionization, stopping, and thermalization of hydrogen and boron beams, injected, respectively, in boron and hydrogen plasmas, is studied. The evolution of the charge state populations of the neutral beams is described considering the various ionization, excitation, and charge exchange channels. The interaction of t…
Abstract The effect of a Bosch injector on the mass distribution function of four viscosity improver (VI) polymers has been studied. Two of these, hydrogenated styrene—isoprene (HSI) and hydrogenated styrene—butadiene (HSB), are di‐block polymers, whereas the others are either comb‐like, polyalkyl methacrylate (PMA),…
This paper compares the rotomouldability and mechanical properties of conventional polyethylenes with metallocene polymers having a similar melt flowrate or the same density. The rotomouldability has been evaluated in terms of bubble removal, cycle times, and heat stability during the moulding process. The mechanical…
The self-assembly of a novel supramolecular cyclic polymer species of general formula [Ru 3 O(CH 3 COO) 6 (CO)(pz)] 6 has been achieved, by starting from μ-oxoruthenium cluster units in the presence of bridging pyrazine (pz) ligands.
Absolute intensities Deltai(q) of small-angle x-ray scattering (SAXS) and ultra-small-angle x-ray scattering (USAXS) were measured in a wide range of scattering vector q from 2x10(-4) to 0.5 A(-1) for transparent (VI-P) and translucent (VI-L) cellulose hydrogels prepared by coagulation and regeneration of viscose in a…
To investigate the role of body shape information on clothing size selection, a sample of 143 males were measured and sized using a computerized digital-image based measurement system. Clothing sizes were initially determined by the system using traditional criteria for the long sleeve shirt, jacket and trousers of a…
A novel series of liquid crystalline compounds, N-(2-hydroxy-4-n-alkoxy-benzaldehydeimino)-2-benzamidoethanamide (habbe) (alkyl = octyl, nonyl and decyl), derived from (N-benzoyl)glycylhydrazide, have been synthesized and characterized. Trivalent rare earth metal complexes of the type [Ln(habbe)2Cl2)Cl·2H2O] (where Ln…
We have developed a liquid crystal (LC) device that is totally controlled using light. The initial alignment is made by optically buffing the azopolymer film with two coherent argon laser beams. Surface relief gratings have been optically induced on an assembled cell filled with LC. A single linearly polarized argon l…
We apply a film thickness-independent technique to measure the index of refraction n=n+ik for amorphous thin films of molybdenum trioxide. The films were grown by thermal evaporation and then colored by light irradiation for different exposure times. Data for the reflectivity and differential reflectivity yield n and…
A novel theoretical approach is suggested for the description of phase transitions and structures observed in antiferroelectric smectic liquid crystals. Allowance is made for two possible types of ordering: short-pitch and long-pitch helical modes. The thermodynamic behavior of the material is treated as a result of t…
Structural and compositional changes of Co phthalocyanine (CoPc) films irradiated by ultraviolet (UV) light of 7.21 eV using an excimer lamp and the corresponding photo-oxidation process have been investigated. Optical absorption and X-ray photoelectron spectroscopy (XPS) measurements showed that the CoPc molecules in…
We have studied the optical transmission of one-dimensional Fibonacci-class quasiperiodic multilayers, which possess a mirror symmetry. We find that the transmission coefficient is unity for all studied sequences at the central wavelength λ = λ 0 , where λ 0 = (1/4) n A(B) d A(B) with n A(B) and d A(B) being the index…
Infrared and FT-Raman spectra have been obtained on pyridine adsorbed within two siliceous materials, silicalite and MCM-41. Both spectroscopic techniques detect the presence of weak physisorbed pyridine and stronger hydrogen-bonded pyridine. In particular, the FT-Raman spectra are well resolved and can be used to mea…