Materials Literature
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The internal friction of hydrogen-doped dilute Pd100-xREx alloys (RE = Gd, Ce) (x = 1 ...9) shows three maxima in the temperature range between 10 K and 300 K. These maxima are interpreted as Zener peak of hydrogen in the β-phase (Ha = 0.11 eV), Snoek-Köster peak (Ha = 0.18 eV) and reorientation peak of diatomic H-RE…
An intergranular Ba[sbnd]Ni[sbnd]Mn oxide precipitate is identified in Ba-doped Ni manganites. The structure of this oxide, as determined by X-ray and electron diffraction, is isomorphous with monoclinic hollandite. The observed domain microstructure (accomodation twins) suggests that a high-temperature ferroelastic p…
Article Solidification of the Nd-Rich Intergranular Phase During HDDR Processing of Nd-Fe-B Type Alloys was published on December 1, 1996 in the journal International Journal of Materials Research (volume 87, issue 12).
The duplex stainless steels present better corrosion behavior than the conventional stainless steels. This is due to their chemical composition (Cr, Ni, Mo, N) and a balanced microstructure (50% ferrite). It might be an increase on the volumetric fraction of ferrite, depending on the cooling rate after welding. In the…
Natural rubber latex was depolymerized by a phenylhydrazine-ferrous chloride system. The influence of phenylhydrazine, ferrous chloride, and ferric chloride at initial pH values of 7 and 10 on degree of depolymerization was investigated. The conversion from ferrous ion to ferric ion and vice versa, the consumption of…
The study the present paper deals with has been developed in the framework of the Safety and Environmental Assessment of Fusion Power Long Term Programme (SEAL), continuing the past SEAFP study, promoted by the Commission of the European Union.The aim of the present work is to analyse the corrosion induced by cooling…
Magnetomechanical hysteresis process was tested using normal mode of load. Tensile and compression load with constant stress rate of 10 MPa s-1 was applied to the rod-like sample of the St3 low carbon Polish steel (cross section 40 mm2). The intensity of the mechanical Barkhausen noise (MBN) was measured during the fi…
The high cycle corrosion fatigue resistance of powder metallurgically (PM) fabricated and hot isostatically pressed (hipped) duplex stainless steels (DSSs) was investigated and compared with that of a conventional forged DSS. Tests were performed in rotating bending fatigue in a chloride and sulphate containing aqueou…
SUMMARY Delaminations in composite beams under cyclic bending are considered taking into account buckling of delaminations and damage accumulation in the interlayer. Local interlaminar tensile and shear stresses near the tips of delaminations are estimated in the framework of the theory of multilayered structures. Two…
Abstract The room temperature transmission and reflection behaviour of misfit layer compounds (MLCs) (MS) n TS 2 (TNb, Ta; MPb, Sm, Tb) were investigated in the spectral range between 1000 and 20000 cm −1 for incident light normal to the layered structure (k ⊥ (001)). A characteristic near infrared transmission wind…
Tritiated waste and glovebox cleanup systems contain significant levels of trititated methane impurities which require reducing and processing to recover the tritium. A viable approach to the recovery of tritium is the conversion of tritiated methane into elemental tritium and carbon by thermal cracking on a heated me…
Plane analytical geometry has been used to derive formulas of peak shifts due to specimen geometry and beam divergence of X-ray diffractometers in a Seemann–Bohlin configuration. When the attenuated diffraction below the specimen surface is not considered, peak shifts depend on Bragg angle (θ), incident beam divergenc…
The behavior of a thin film of nematic liquid crystal with unequal Frank constants is discussed. Distinct Frank constants are found to imply unequal core energies for +\textonehalf{} and -\textonehalf{} disclinations. Even so, a topological constraint is shown to ensure that the bulk densities of the two types of disc…
Low absorption coefficients for the light polarizations along the crystallographic a, b, and c* axes of (-)2-α-(methylbenzylamino)-5-nitropyridine single crystals were measured at the wavelengths 1064 nm and 532 nm. They were found to be in the range from 0.02 cm-1 to 0.06 cm-1, i.e., of the same order of magnitude as…
Abstract Crystal structure and polymorphism induced by uniaxial drawing of a poly(aryl ether ketone) [PEDEKmK] prepared from 1,3‐bis(4‐fluorobenzoyl)benzene and biphenyl‐4,4′‐diol have been investigated by means of transmission electron microscopy (TEM), electron diffraction (ED), wide‐angle X‐ray diffraction (WAXD),…
Abstract Poly( p ‐phenylene sulfide) (PPS) oligomers were synthesized from sodium sulfide (SS) and p‐dichlorobenzene ( p ‐DCB) in hexamethylphosphoramide (HMPA) under atmospheric pressure. The effects of reaction time, temperature, and monomer ratio on end groups and molecular weight of PPS oligomers were investigated…
Lanthanide luminescence was used to examine the effects of posttranslational adenylylation on the metal binding sites of Escherichia coli glutamine synthetase (GS). These studies revealed the presence of two lanthanide ion binding sites of GS of either adenylylation extrema. Individual emission decay lifetimes were ob…
Electrochemical cyclic potentiodynamic polarization experiments were performed on several candidate waste package container materials to evaluate their susceptibility to pitting corrosion at 90 degrees C in aqueous environments relevant to the potential underground high-level nuclear waste repository. Results indicate…
Stress corrosion cracking (SCC) of single-crystal type 321 (UNS S32100) stainless steel (SS) was investigated in 42% boiling magnesium chloride (MgCl2) solution. Tests were performed under Mode II loading to study the SCC mechanism. Maximum normal stress and maximum shear stress were located at different positions on…
The genes (mdh) encoding malate dehydrogenase (MDH) from the mesophile Chlorobium vibrioforme and the moderate thermophile C. tepidum were cloned and sequenced, and the complete amino acid sequences were deduced. When the region upstream of mdh was analyzed, a sequence with high homology to an operon encoding ribosoma…