Materials Literature
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Abstract Several MnMoNi pressure vessel steels with varying Ni, Cu, and Mo contents have been investigated in the irradiated and unirradiated condition. Examination using analytical transmission electron microscopy was performed in order to understand more fully the nature of both the inter- and intra-granular precipi…
Abstract Properties of water adsorbed in mesoporous MCM‐41 material with pore diameter of 3.7 nm have been investigated in wide frequency (20 Hz–1 MHz) and temperature (200 K– 400 K) ranges using the dielectric spectroscopy method. The obtained results showed that the dielectric response of such a two‐phase system in…
This study investigates the performance of up-converting rare-earth phosphors doped with different trivalent erbium (Er/sup 3+/) concentrations: 2%, 20%, 50%, 100%, and with the addition of 20% ytterbium (Yb). The dominant up-conversion (UC) mechanisms within these phosphors are discussed and examined using photolumin…
Abstract Polypropylene (PP)/montmorillonite (MMT) nanocomposites were prepared by the esterification of propylene‐ g ‐maleic anhydride (MAPP) with MMT modified with α,ω‐hydroxyamines. The structural characterization confirmed the formation of ester linkages and the interaction between the silicate layers. In particula…
Abstract A survey of neutron- and thermally-induced phosphorus inter-granular segregation behavior in C-Mn welds, LWR plates, LWR HAZ materials, and VVER steels is described in this paper. The materials were irradiated up to doses of 0.13 dpa (fast neutron energy > 1 MeV), with dose rates ranging from 1.75 × 10…
Abstract The use of PVC in biomedical applications is often questioned, owing to the possible adverse effects that this material may have on human health. Blood is transported in dialysis devices through flexible plastic tubes that are usually made of PVC. The most common plasticizer, even for such biomedical applicat…
We investigated correlation of orbital and magnetic anisotropies in strained ferromagnetic ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_{3}$ films epitaxially grown on different substrates, using the magnetic circular dichroism at Mn ${L}_{2,3}$ absorption edges. The obtained in-plane and out-of-plane orbital…
The growth of cubic boron nitride (cBN) films on bare silicon and amorphous tetrahedral carbon (ta-C) layers prepared on silicon substrates was studied. The cBN films were prepared by radio frequency magnetron sputter deposition at approximately 870 degrees C. The original ta-C interlayers were graphitized and restruc…
Abstract This paper presents results of radiation-induced nanoscale microstructural changes measured by Small-Angle Neutron Scattering (SANS) on ASTM-type reactor pressure vessel (RPV) steels. Five different base metals and one weld metal were investigated. The irradiation was performed in a VVER-type power reactor to…
Abstract TEM investigations have been performed on irradiated samples after deformation covering various testing conditions for different recrystallized Zr alloys. It is shown that for transverse tensile tests and internal pressure tests performed at 350°C, only basal channels are observed for strain levels up to unif…
Abstract Coarse‐grained Cu99.99 was prestrained by ε pre in multiple compression in three orthogonal directions at room temperature. While the flow stress σ saturates at ε pre ≈ 2, the strain rate sensitivity of σ at 318 K increases by a factor of ≈ 2.7 from ε pre = 2 to 7. This increase is attributed to decrease of g…
Abstract Mechanical properties of high-purity polycrystalline cubic SiC was characterized after neutron irradiation. Bar samples were irradiated in target position capsules in the High Flux Isotope Reactor (HFIR, Oak Ridge, Tennessee) to nominal fluence levels up to 7.7 dpa at temperatures of 300, 500, and 800°C. A de…
Abstract Propagation of an axial crack has been characterized by means of the Pin-Loading Tension (PLT) test. The same experimental arrangement is used for the Delayed Hydrogen Cracking (DHC) and for the J-integral measurements. The DHC tests are performed under variable temperature and/or load conditions simulating a…
Abstract Sulfonated poly(ethylene terephthalate) (SPET)/montmorillonite nanocomposites were prepared by in situ intercalative polymerization. The microstructure, morphology, and properties of the nanocomposites were studied with wide‐angle X‐ray diffraction, transmission electron microscopy, atomic force microscopy, d…
Abstract An experimental irradiation, named “Alexandre,” has been carried out in the Osiris experimental reactor to perform a generic study on the mechanical behavior after irradiation at 325°C of different kinds of steels suitable for use as irradiated components in a nuclear reactor [1]. The irradiated steels were a…
Hydrothermally synthesized caesium gallium(III) hydrogen arsenate(V), CsGa(H1.5AsO4)2(H2AsO4), (I), and isotypic caesium chromium(III) hydrogen arsenate(V), CsCr(H1.5AsO4)2(H2AsO4), (II), represent a new structure type and stoichiometry among MI-MIII hydrogen arsenates. The crystal structure, determined from single-cr…
Abstract Ti-35Nb-7Zr-5Ta rods containing 0.06, 0.46, and 0.68 wt.% oxygen were produced by vacuum arc melting and forging. These were solution treated (ST) and aged in the temperature range of 427–593°C for 8 h followed by air cooling. Increasing oxygen content increased the ST yield strength (YS) from 530 to 1081 MPa…
Abstract Howmedica developed the Titanium-12Molybdenum-6Zirconium-2Iron beta titanium alloy (also known as TMZF® beta titanium alloy) in the late 1980s. Two patents were issued for this high strength, low modulus, ductile, biocompatible, titanium base alloy [1,2]. The mechanical properties for wrought machining and fo…
We have developed a new design of optical spectrometer based on the use of a chirped holographic grating inscribed on a flat substrate. This type of grating has a surface modulation with a spatially varying period. The ability of the chirped grating to focus a beam is exploited to reduce significantly the physical dim…
Abstract The performance of two types of Duplex claddings irradiated to very high burnup in a German high duty pressurized water reactor (PWR) has been studied. Four fuel rods with Duplex cladding were moved from two discharged assemblies to a low-burnt assembly for further irradiation. These rods were finally unloade…