Materials Literature
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Ceramics exhibit macroscopic stress/strain rate relations that should lead to superplastic extension. However, premature fracture is normally encountered, due to the formation and growth of grain‐boundary cavities. Thus, cavity nucleation and growth were analyzed in an attempt to identify microstructures and/or strain…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElastic Properties of Well-Characterized Ethylene-Propylene Copolymer NetworksDale Pearson and William GraessleyCite this: Macromolecules 1980, 13, 4, 1001–1009Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published inissue 1 July 1980htt…
General formulas of the angular distribution and spin polarization of photoelectrons are derived for arbitrarily polarized incident photons including all multipole effects of the photon fields. Dynamical parameters are given in terms of reduced matrix elements suitable for a general multichannel theory in both the rel…
Graphite–halogen (Br2, ICl) residue compounds have been found to be convenient temperature calibration standards for transmission electron microscopy in the medium temperature range. Due to the order–disorder transformation associated with the intralayer intercalate ordering in these intercalation compounds, the obser…
Theoretical and experimental aspects of the Yttrium oxide, Y2O3, plasticity are studied. Stacking fault energy computations are performed on the basis of an ionic crystal model. The results clearly establish the possibility of a stacking fault having a very low energy. Consequences on the fine structure of the disloca…
Determination of corrosion rate for carbon steel in stagnant NaCl solutions was attempted by the linear polarization method, but none of the polarization data obtained by conventional procedures (potentiostatic or potentiodynamic) gave satisfactory results. It was shown that the value of calculated corrosion rate is a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction Diglycolic Acid by Nitric Acid Oxidation of Diethylene GlycolChung Y. Shen and Dennis A. RuestCite this: Ind. Eng. Chem. Process Des. Dev. 1980, 19, 3, 401–404Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published inissue 1 Ju…
Variations of the electronic work function of carburized rhenium foils containing approximately 5 at.% carbon have been observed using the contact potential difference technique. Surface work function was observed to vary between 5.25 and 4.1 eV, with the work function of pure rhenium taken as 5.0 eV. Decrease in work…
Torsion and mass loss effusion techniques are applied simultaneously to measure the saturation vapor pressures as a function of temperature. The enthalpies of sublimation are derived from the temperature dependence of vapor pressure. Overall mean values for both techniques are: TTF, ΔH0(344.91 K) = (95.3±1) kJ mol−1;…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical control of superconductivity in the hexaboridesKurt Hiebl and M. J. SienkoCite this: Inorg. Chem. 1980, 19, 7, 2179–2180Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published inissue 1 July 1980https://doi.org/10.1021/ic50209a07…
To verify the condensation of higher-order harmonics of the soft mode in incommensurate phase, group-theoretical consideration and detailed structure analysis have been made of the incommensurate phase of thiourea. The group-theoretical consideration shows that extinction rules observed by neutron diffraction imply co…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntense satellites in the N 1s x-ray photoelectron spectra of certain metalloporphyrinsS. Muralidharan and R. G. HayesCite this: J. Am. Chem. Soc. 1980, 102, 15, 5106–5107Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published inissue 1 J…
Abstract Polyphosphate and polyphosphonate esters of molecular weights > 10,000 were synthesized by base‐promoted, liquid‐vapor and liquid‐liquid interfacial polycondensations of hydroquinone (HQ) with 4‐methylthiophenyl phosphorodichloridate (MTPP) and phenylphosphonic dichloride (PPD). The barium hydroxide‐initia…
Abstract Die Zustandsdiagramme der Systeme ACl/EuCl 2 und ACl/SrCl 2 (A = Cs, Rb, K, Na, Tl) wurden mittels Differenzthermoanalyse aufgestellt. In den Systemen mit CsCl und RbCl existieren Verbindungen AMCl 3 ; die Hochtemperaturmodifikationen kristallsieren im kubischen Perowskit‐Typ, bei tieferer Temperatur treten V…
Abstract The air oxidation of poly‐ p ‐xylylene films was studied at temperatures between 125 and 200°C. The oxidation kinetics were obtained from neutron activation (NA) oxygen analyses and infrared (IR) Spectroscopy. A correlation between the NA oxygen analyses and mechanical properties indicated that the amount of…
Microalloyed steels show a greater atmospheric corrosion resistance than plain carbon steels through the formation of protective films, designated as patinas. During the development of these films, they present a continuous double layer structure. The inner phase is the only one left after long exposure periods and is…
The bypass of particles by climb necessarily results in an increase in length of a dislocation, provided its ends are anchored at network nodal points. The energy associated with this length increase is provided by the applied stress. It follows that a critical threshold stress for the climb process, and hence for rec…
Metallic cations are effective corrosion inhibitors under certain experimental conditions. They may also be virulent activators of corrosion in acids in the case of cations which in the metallic form may have high exchange densities for hydrogen evolution. Eleven mechanisms whereby metallic cations inhibit corrosion a…
Abstract All materials are subject to aging, a process of long‐term degradation, but not at the same rate or affected in the same manner. The wide variation in susceptibility (or resistance) of polymers to various degradative agents, e.g., oxidative, thermal, mechanical, chemical, biological, depend on their chemical…
In order to explain the influence of carbon on the embrittlement of 12%Cr steels, a systematic study of the effects of tempering on AISI 410 steel was carried out. Reversible temper embrittlement was detected and related to the mechanical properties and microstructural variations and to the segregation of carbon and a…