Materials Literature
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Iron-sulphur alloys which contained up to 3.5% sulphur were desulphurized at 1545C by gas mixtures which contained 2-100% hydrogen along with argon and/or helium as diluents. The rate of the reaction was measured by observing the rate of production of hydrogen sulphide. The results indicated that equilibrium between h…
Abstract : The memorandum discusses the thermodynamics associated with the flow processes in hypervelocity cratering. Qualitative, graphical arguments are presented to show that previously proposed thermal-impact theories, which postulate that the kinetic energy of impacting projectiles goes entirely into breaking of…
Neutron irradiation has an adverse effect on the tensile ductility of austenitic steels and a nickel-base alloy at test temperatures above about 600 C. n contrast to the fast-neutron-induced, low-temperature irradiation hardening and embrittlement of materials, the loss in ductility at elevated temperatures is a funct…
Abstract Thermal conductivity curves for the 0°C to 170°C temperature region are presented for six irradiated low density polyethylene samples (radiation doses from 0 to 3100 megarads) and one irradiated high density sample (120 megarad dose). In agreement with data in the literature for unirradiated polyethylene, the…
Abstract The interaction of glissile extended dislocations on intersecting {112} planes in the bodycentered cubic lattice is considered. It is found that, for each axis of intersection of two {112} planes except 〈111〉, stair‐rod dislocations of Burgers vectors 1/3 〈001〉, 1/3 〈002〉, and 1/6 〈113〉 can be formed. Formula…
Abstract A discussion of the relationship between theoretical principles of chemical similarity on one hand and empirically measurable similarity on the other suggests that specifically adsorbing silica gels represent an experimentally simple model for ‘bioisomorphism’, the similarity found in biological systems.
The analysis of typical e - aq scavengers such as oxygen, hydrogen peroxide, nitrous oxide, acetone, and thymine in the concentration range from 10 -8 to 10 -6 M is reported. These compounds react with e - aq with rate constants that vary from 4 x 10 9 M -1 sec. -1 for thymine to 1.9 x 10 10 M -1 sec. -1 for oxygen. H…
A new and relatively convenient procedure for obtaining kinetic parameters in the degradation of high polymers is described and the necessary experimental procedure is outlined. Results for the degradation of Teflon are compared with several previously reported methods and the agreement is found to be good. Some advan…
Abstract Für das neutrale Salz, dessen Eigenschaften mitgeteilt werden, konnte die Zusammensetzung Bi(NO 3 ) 3 · H 2 O gesichert werden. Das thermische Verhalten des Bi(NO 3 ) 3 · 5 H 2 O wurde mittels isobarem Abbau, Aufheizversuchen und Differentialthermoanalyse untersucht und die Zersetzungsprodukte mit Hilfe von c…
D. F. Evans, W. P. Griffith and L. Pratt, J. Chem. Soc., 1965, 2182 DOI: 10.1039/JR9650002182
Nous avons mesuré les potentiels d’apparition des ions : M+, MI+, M2I+, l+, HI+, LiMI+, ainsi que Li3I2+ et Na3I2+, où M représente un métal alcalin.
On the segregation of a steel or alloy ingot, the effect of stirring during the process of solidification appears to be an important factor to clarify the segregation phenomenon. In the present investigation on Al-Cu alloy, stirring was carried out by means of the method hydro-dynamically known as Taylor’s vortex flow…
Journal Article Osmium Tetroxide Fixation of Rubber Latices Get access Koichi KATO Koichi KATO Central Research Laboratories, Toyo Rayon Company, Ltd.Otsu, Shiga-ken Japan Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Electron Microscopy, Volume 14, Issue 3, 1965, Pages 219…
The thermal conductivities of sintered Al 2 O 3 and UO 2 were measured in the ranges 400° to 1700°C and 300° to 2100°C respectively. The conductivity values for Al 2 O 3 agreed with those reported previously at all temperatures investigated. The conductivity of UO, decreased with increasing temperature to a minimum of…
S. S. Tate, A. K. Grzybowski and S. P. Datta, J. Chem. Soc., 1965, 3905 DOI: 10.1039/JR9650003905
La constante diélectrique ε de Cu2O a été mesurée par une méthode optique et pour des nombres d'onde variant de 4 000 à 50 cm —1. La valeur de ε extrapolée donne : εstat = 7,5 ± 0,2. La courbe de dispersion peut-être représentée par une formule du type [FORMULE]faisant intervenir les deux fréquences actives dans l'inf…
Lechevalier, Hubert (Rutgers, The State University, New Brunswick, N.J.), and Pauline E. Holbert. Electron microscopic observation of the sporangial structure of a strain of Actinoplanes. J. Bacteriol. 89:217-222. 1965.-Actinoplanes sp. P 128 has polarly flagellated sporangiospores. The numerous flagella, formed by th…
SummaryThe effects of anodizing aluminium of commercial purity (99%) in sulphuric acid at temperatures of -5° to +15°C and current densities of 20 to 80 A/ft2 for 20 to 80 minutes have been studied, with particular reference to appearance and resistance to abrasion. It has been shown that uniform self-coloured films r…
On décrit de nouveaux sulfures de terres rares et de métaux alcalins (Li, K). Les composés TLiS₂ (T = Pr à Y) ont une structure cubique du type NaCl, les atomes T et Li étant désordonnés ; pour les terres rares de rayons plus petits (Ho, Er, Yb), les atomes T et Li s'ordonnent et il apparaît une déformation rhomboédri…
L’aspect des phénomènes de diffraction des rayons X et des électrons par les molécules gazeuses est bien connu ; on sait en effet que les enregistrements photographiques de ces phénomènes permettent d’observer un ensemble d’anneaux concentriques, dont le centre coïncide avec la trace du faisceau direct.