Materials Literature
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Abstract A brief summary of crystal growth models – the surface diffusion model of Burton, Cabrera and Frank and computer simulation models – is given and these models are confronted with measured ( R , σ) curves. It was found that the most ( R , σ) curves measured so far can be fitted by BCF curves with 10 −2 ≲ σ 1 ≲…
Crystal structure and lattice defects of the Ni-36.8 at% Al martensite have been investigated mainly by transmission electron microscopy. A structure of the martensite determined in the present work has a normal Ll0 type (CuAu I type) structure which is different from a modified Ll0 type (not CuAu I type) structure su…
Blocks of the kidney and other organs of the guinea pig fixed with glutaraldehyde and treated with tannic acid and osmium tetroxide could, without any coating, be observed in the scanning electron microscope. Undesirable charging effect was inconspicuous when accelerating voltage 5-25kV was used. A scanning image of t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidation of iron(II) porphyrins by alkyl halidesRuth S. Wade and C. E. CastroCite this: J. Am. Chem. Soc. 1973, 95, 1, 226–230Publication Date (Print):January 1, 1973Publication History Published online1 May 2002Published inissue 1 January 1973https://pubs.acs.org/doi/10.10…
Nonstabilized 300 series stainless steels stressed over yield are susceptible to intergranular stress corrosion cracking (SCC) when exposed in the heavily sensitized condition to 288 C (550 F), high purity water containing dissolved oxygen. The effects of stress, oxygen levels, and significant metallurgical parameters…
D A Shirley Amsterdam: North Holland 1972 pp xii + 906 price $28·25 The book is a rapidly printed collection of the papers presented at an international conference held at Asilomar in California in September 1971. The rapid appearance is welcome although to this end the production is by a varitype process with unjusti…
Abstract It is shown how the stress field due to any prescribed continuous distribution of dislocations can be determined. The finite element method is employed giving wide freedom with regard to boundary geometry and material properties. The presentation is limited to situations which conform to either the standard p…
A detailed study has been made of the void and dislocation microstructure of Types 304 and 316 stainless steel irradiated with 4-MeV 58N+ at a displacement rate of 5 × 10-3 dpa/s-1. The range of dosages investigated were 20 to 350 dpa at 525 C (977 F) and 20 to 250 dpa at 600 C (1112 F) for Type 304 stainless steel an…
An indirect method has been developed for the stepwise titration of barium and strontium with EDTA, based on precipitation of the elements as sulphate from a homogeneous solution. Barium, strontium and other multivalent cations are complexed by titration with EDTA at pH 10·0 by using a mixed indicator comprising Erioc…
Experimental details of the 4T⇌2E‘equilibrium’ for the complex [CoII(tpa)2](ClO4)2(tpa = tri-2-pyridylamine) are given together with temperature-dependence studies of the magnetic behaviour of the hexafluorophosphate salt and of the corresponding 4-, 5-, and 6-methyl-substituted tri-2-pyridylamine complexes of cobalt(…
A survey is given on the structural family of beta brass related structural types. The members of this family are given by a vacancy forming process, by different possibilities of strains and by shifts. The multitude of structural types may be rationalized by a model which considers two spatial correlations of electro…
Low energy ions were injected into single crystal Cu, sintered UO2 and glass and the probabilities of entrapment measured, as a function of ion energy from 50 eV to 3 keV, by heating the targets after irradiation and recording the ratio of quantity of gas released to incident ion fluence. Values of entrapment probabil…
Anodic and cathodic polarization behavior of Ti‐6Al‐4V alloy were determined by potentiostatic and galvanostatic techniques in deaerated 1, 5, and 10 N sulfuric acid solutions. In the active region, metallurgical processing, which included cold rolling and thermal treatment, had no effect on the corrosion behavior. It…
The complexes M2MnCl5(M = NMe4, NMe3H, Cs), M2MnCl5,H2O (M = NH4, K, Rb), and [Nme2H2]2 MnCl5,EtOH have been prepared and their properties compared with those of [NEt4]2MnCl5 and M′MnCl5(M′= phenH2, bipyH2); [NMeH3]2MnCl5 was difficult to isolate in a pure state. The complexes were characterized by magnetic measuremen…
Results of x-ray diffraction experiments investigating equilibrium structures of uranium-base substitutional alloys and routes of transitions between equilibrium structures are critically reviewed. Data on equilibrium alpha, beta, and gamma alloys are presented together with a resume of work on the crystal structures…
Crystals of the title 1:1 molecular complex are monoclinic, a= 7·32, b= 14·55, c= 10·88 Å, γ= 90·4°, space group P21/b, Z= 2. The structure has been determined from diffractometer data by direct methods and refined by least squares to R 0·064 for 1644 independent reflections. The dimensions of the component molecules…
The galvanostatic operation of flooded porous electrodes employing metal/metal salt couples is analyzed. A model is developed for a single, circular pore configuration which accounts for the effects of differing equivalent volumes of the solid reactants. The model also includes effects of variation in solution propert…
Abstract Thermodynamic interaction parameters have been calculated from gas–liquid chromatographic measurements for linear and branched polyethylene interacting with selected hydrocarbons. The values of the interaction parameter χ are substantial in spite of chemical similarities between the polymer and low molecular…
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THE RESULTS ARE REPORTED OF A SERIES OF UNIAXIAL COMPRESSION CREEP TESTS OF AN ASPHALT MIXTURE UNDER CONSTANT LOADINGS, MULTIPLE-STEP LOADINGS, AND REPEATED LOADINGS OF AS MANY AS 100 CYCLES. IT HAS BEEN SHOWN THAT THE NONLINEAR VISCOELASTIC BEHAVIOR OF THE ASPHALT CONCRETE CAN BE REPRESENTED BY A NONLINEAR GENERALIZE…