Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Dielectric loss measurements are reported for polystyrene, crosslinked polystyrene, polyacrylamide, branched polyacrylamide, and poly(methyl methacrylate) at 1 and 10 kHz f over the temperature range −85 to +100°C. Crosslinking and branching have a pronounced effect on the dielectric relaxation spectra of pol…
Etude de neuf Cepheides de faible amplitude et de courte periode (<8 jours) afin de determiner leurs parametres physiques et proprietes pulsationnelles
It is experimentally known that an antiferromagnetic compound CrSb ( T N ≧700 K) with a NiAs type crystal structure exhibits unusual magnetic properties, that is, sharp decrease of magnetic moment, steep increase of magnetic specific heat and of magnetic susceptibility just below T N with increasing temperature. These…
Redetermination, par diffraction X sur monocristal, de la structure cristalline de BiSBr en utilisant des methodes plus modernes que celles effectuees par Donges (1950). Groupe d'espace Pnam avec a=8,1666, b=9,8532, c=4,0492 A, Z=4. Description de l'arrangement structural des atomes dans la maille. Formation d'un syst…
Copper, a noble metal that occurs naturally in its elemental form, is almost totally impervious to corrosion from soils found worldwide. But it would be misleading to infer that copper will not corrode. This article identifies a host of possible situations in which copper pipe or tubing may be subject to external corr…
The tensile properties of solution-treated Incoloy alloy 800H, Hastelloy-X, Nimonic-86, and Inconel-617 have been determined in the temperature range 20 to 1000°C. The strength parameters at temperatures above 700°C showed a strong dependence on the strain rate; at low strain rates the deformation was dominated by cre…
Abstract The structural phase transition (PT) of elpasolite‐type crystal Cs 2 NaBiCl 6 is investigated by neutron scattering. At first the acoustic phonon dispersion is measured at room temperature for the highsymmetric directions Δ, ∑, and Λ of the Brillouin zone. The transverse rotary mode is studied for phonon wave…
This paper presents a mechanistically consistent model of impact damage based on elastic failures due to tensile and shear overloading. An elastic axisymmetric finite element model is used to determine the dynamic stresses generated by a single particle impact. Local failures in a finite element are assumed to occur w…
A corrosion program is being carried out to establish the long-term corrosion behavior of candidate alloys for the prototype nuclear process (PNP) reactor primary circuit. Results are presented for corrosion tests performed in impure helium over the temperature range of 700 to 900 °C for times up to 10000 h.In the hel…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics and kinetics of carbon dioxide chemisorption on calcium oxideDario Beruto, Rodolfo Botter, and Alan W. SearcyCite this: J. Phys. Chem. 1984, 88, 18, 4052–4055Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue…
Metallized film capacitors consist of alternating layers of polypropylene or other polymeric film dielectric and vapor deposited aluminum conductor. During operation above 250 V ac (RMS), circular islands of oxide develop in the aluminum conducting layers and reduce the capacitance. Increasing the aluminum layer thick…
Abstract X‐ray‐induced Auger electron spectroscopy (XAES) was used to examine the surface chemical states of hydrogen implanted metals. The chemical shifts of the M 4,5 N 2,3 V Auger peaks from their metallic states were 1.0 eV, 3.3 eV and 2.2 eV, respectively, for ion‐implanted Y, Zr and Nb. The separation energies w…
We report results obtained with our recently automated low-temperature, adiabatic calorimeter. A brief description of the changes in the instrument are provided. The heat capacities of natural osumilite (Kee3Naa.seCao.ozBaoelMgl s6Fee.3sTis.s1Ala.62 Siro rzOro) were measured from 340 to 1000 K by differential scanning…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTColor centers and clustering in liquid alkali metal-alkali halide solutions approaching the nonmetal-metal transition: an optical studyW. Freyland, K. Garbade, H. Heyer, and E. PfeifferCite this: J. Phys. Chem. 1984, 88, 17, 3745–3749Publication Date (Print):August 1, 1984Pu…
A method for measuring the solubility limit of refractory oxides in glass is presented, and the solubilities of Al 2 O 3 , ZrO 2 , SnO 2 , and Cr 2 O 3 in soda‐lime glass are given as a function of temperature. The order of solubility in soda‐lime glass is Al 2 O 3 ZrO 2 SnO 2 Cr 2 O 3 at 1300° to 16Q0°C. The solubili…
With respect to their phase transitions, Cs2CdBr4 and Cs2HgBr4 are the first known representatives of a new group having the flK2SO4-type structure. Upon coolmg they show the following phase sequence. Phase I: Pnma, Z -4. Cs, Cd /Hg and two Br are in special positions on the mirror plane. Second-order phase transition…
Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
Abstract The hexamolybdo-platinate(IV) anion, [PtMo6O24]8− has been found to have two geometrical isomers, one having the Anderson structure and the other having the same framework with the heptamolybdate ion reported by Lindqvist.
Creep and stress rupture properties are determined for the candidate materials to be used in high-temperature gas-cooled reactor (HTGR) components. The materials and test methods are briefly described based on experimental results of test durations of ∼20 000 h. The medium creep strengths of the alloys lnconel-617, Ha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluences on carbon monoxide and dioxygen binding to iron(II) porphyrinsKenneth S. Suslick, Mary M. Fox, and Thomas R. ReinertCite this: J. Am. Chem. Soc. 1984, 106, 16, 4522–4525Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published…