Intergranular Stress Corrosion Cracking of Unsensitized Stainless Steels in BWR Environments
This chapter contains sections titled: Introduction Experimental Procedure Results Discussion
Materials Literature
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Microtribology and Direct Force Measurement of WS2 Nested Fullerene-Like Nanostructures
Inorganic fullerene-like nested nanostructures (IFs) such as the WS2 IFs shown in the Figure deposited on an a-SiOx-coated TEM grid are confirmed to confer tribological advantages when added to a lubricant fluid (tetradecane) between two shearing mica surfaces. It is shown that the lower friction is associated with fr…
A Remarkable Elevation of Freezing Temperature of CCl4 in Graphitic Micropores
The freezing behavior of CCl 4 confined in graphitic micropores of activated carbon fibers (ACFs) was examined by use of differential scanning calorimetry over the temperature range of 180 to 320 K. For ACF of average pore width, w = 1.1 nm, we observed a clear peak showing that the freezing temperature is 299 K. The…
Thermally Reversible Photochromic Systems. Photochromism of a Dipyrrolylperfluorocyclopentene
Abstract A diarylethene having 2-cyanopyrrole rings turned blue upon UV irradiation in ethyl acetate. The colored form was unstable and returned to the colorless open-ring form with a half-life time of 37 s at room temperature. The activation energy of the thermal fading was obtained to be 32.5 kJ / mol, which is less…
Local atomic arrangements in polytetrahedral materials
The paper presents a topological classification of the first-coordination-shell shapes for atoms in solids. The classification includes the coordination shells with up to 13 atoms in a shell. Application of the scheme to the classification of disclination junction configurations and interstitial hole shapes is discuss…
ICRF boronization - A new technique towards high efficiency wall coating for superconducting tokamak reactors
ICRF boronization - A new technique towards high efficiency wall coating for superconducting tokamak reactors, Jiangang Li, Yan Ping Zhao, Xue Mao Gu, Chen Fu Li, Bao Nian Wan, Xiao Dong Zhang, Jia Rong Luo, Xian Zhu Gong, Ji Kang Xie, Yuan Xi Wan, Ping Jian Qin, Xiao Ming Wang, Yue Dong Meng, Shen Fa Li, Xiang Gao, Y…
Synthesis of new aromatic polyimides with various side chains containing a biphenyl mesogen unit and their abilities to control liquid-crystal alignments on the rubbed surface
New poly(m-phenylene 4,4′-oxydiphthalimide)s containing various side chains, such as 6-(4-biphenylmethoxy)hexyloxy group and 6-(phenylphenoxy)hexyloxy isomers, were synthesized, giving thin films of a high quality. All the polyimides apparently were almost amorphous, but exhibited short-range ordering in some extent,…
THE USE OF SISAL FIBRE AS REINFORCEMENT IN CEMENT BASED COMPOSITES
ABSTRACT The inclusion of fibre reinforcement in concrete, mortar and cement paste can enhance many of the engineering properties of the basic materials, such as fracture toughness, flexural strength and resistance to fatigue, impact, thermal shock and spalling. In recent years, a great deal of interest has been creat…
Syntheses and characterizations of thermally reworkable epoxy resins. Part I
To meet the need for reworkable epoxy resins, a series of cycloaliphatic diepoxides containing thermally cleavable carbamate linkages were synthesized and characterized. These materials were shown to undergo curing reactions with cyclic anhydride in a similar fashion as a commercial cycloaliphatic epoxide, except that…
The crystal chemistry of the eudialyte group
Mineralogi
Vibrational analysis of the dioctahedral mica; 2M 1 muscovite
Raman spectra and lattice dynamics calculations are presented for the dioctahedral mica, muscovite. Calculated fundamental mode frequencies for the Raman-active and A g and B g species were fit to observed fundamentals assigned to features in the two polarized Raman spectra collected, so that unambiguous vibrational a…
A decagonal quasicrystal with a Griffith crack
The crack theory in conventional linear elasticity fracture mechanics is extended to quasicrystal linear elasticity fracture mechanics. A decagonal quasicrystal containing a Griffith crack penetrating through the solid along the period direction is considered. By means of a general solution, the analytical expressions…
Raman characterization of germanium nanocrystals in amorphous silicon oxide films synthesized by rapid thermal annealing
Raman characterization of germanium (Ge) nanocrystals embedded in amorphous silicon oxide (a-SiO2) films synthesized by rapid thermal annealing (RTA) has been carried out. The samples were prepared by cosputtering Ge and SiO2 targets using a rf magnetron sputtering machine. Ge nanocrystals can only be obtained from sa…
The Water Activities of MgCl2, Mg(NO3)2, MgSO4, and Their Mixtures
The water activities of aqueous MgCl 2, Mg(NO3)2, and MgSO solutions and their mixtures - MgCl 2-Mg(NO3)2 (mole ratio 3:1, 1:1, 1:3), MgCl 2-MgSO4 (1:1), Mg(NO3)2-MgSO4 (1:1), and MgCl 2-Mg(NO3)2-MgSO4 (1:1:1 and 1:1:5) - were measured at room temperature from dilute solution to high supersaturation using an electrody…
Oxygen adsorption on Ag(111): X-ray photoelectron spectroscopy (XPS), angular dependent x-ray photoelectron spectroscopy (ADXPS) and temperature-programmed desorption (TPD) studies
The O2 adsorption on Ag(111) single crystal in the range of 300–500 K has been studied by XPS, ADXPS, and TPD. At room temperature, the O1s line observed at 530.0 eV goes down to 528.2 eV when the sample is heated to 420 K. The comparison of XPS and TPD data indicates that both lines can be assigned to chemisorbed ato…
Voltammetry Studies of Single‐Crystal and Polycrystalline Diamond Electrodes
Boron‐doped polycrystalline and near‐single‐crystal quality diamond electrodes were studied by voltammetry. A redox couple with vs. standard hydrogen electrode was detected on the polycrystalline electrodes but was absent on the single‐crystal electrodes. The results strongly suggest that the couple is associated with…
Surface characterization and adsorption abilities of cellulose fibers
Abstract The adsorption abilites of cotton cellulose fibers are very often modified by alkaline treatments in form of alkaline purification or mercerization using high concentration of NaOH. We tried to determine the correlation between morphological modifications and the adsorption abilities of cotton fibers using se…
Effect of cyclic moisture absorption desorption on the mechanical properties of silanized jute‐epoxy composites
Abstract The goal of this paper is to discuss the influence of water absorption‐desorption cycles on the mechanical properties of natural fiber reinforced plastics. Therefore, epoxy resins with jute wovens as reinforcement with untreated and silane treated fibers were investigated. Silane treatment of fibers led to in…
Structural development in the early stages of annealing of sol–gel prepared lead zirconate titanate thin films
Lead zirconate titanate (PZT) thin films on platinized silicon were fabricated and their structural development upon annealing was characterized by x-ray diffraction and transmission electron microscopy (TEM). The amount of a transient intermetallic phase Pt3Pb was found initially to increase with annealing time and t…
Silicon nitride coating on titanium to enable titanium-ceramic bonding
Failures that occur in titanium-ceramic restorations are of concern to clinicians. The formation of poorly adhering oxide on titanium at dental porcelain sintering temperatures causes adherence problems between titanium and porcelain, which is the main limiting factor in the fabrication of titanium-ceramic restoration…