The effects of hypervelocity impact on honeycomb structures
Hypervelocity impact effect on structural honeycomb spacecraft wall configurations, stressing design and wall thickness parameters
Materials Literature
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X-ray and electron spin resonance studies of di(tetramethylammonium)bis(maleonitriledithialato) Cu II
X-ray and electron spin resonance studies are reported of the paramagnetic material [(CH 3 ) 4 N] 2 Cu[S 2 C 2 (CN) 2 ] 2 in single-crystal form, and also of this compound diluted in its diamagnetic nickel analogue. This mixed crystal is triclinic, and the copper ion has axial magnetic symmetry, with the Hamiltonian p…
Ductile behavior of single crystal mats of an ethylene–propylene copolymer
Abstract It is reported that mats formed by the sedimentation of single crystals of methyl‐ and ethyl‐branched polyethylene exhibit strength and ductility comparable with that of melt‐crystallized films. In fact, in the case of methyl‐branched polymers, extensions of up to 50× were obtained on cold drawing. Observatio…
Zur Kenntnis des „Cu5As2”
Abstract Die bei 709°C durch peritektische Reaktion gebildete Hochtemperaturphase hat die Zusammensetzung Cu 9,5 As 4 , sie kristallisiert kubisch mit einer Formeleinheit im Elementarkörper. Bei langsamem Abkühlen zerfällt die Hochtemperaturphase peritektoid zwischen 360 und 340°C in β‐Cu 3 As und As. Durch Abschrecke…
Phase relationships and thermodynamic interactions in isotactic polypropylene–diluent systems
Abstract Phase relationships of isotactic polypropylene in various organic diluents were investigated. The diluents used were aliphatic alcohols, alkyl phenols, aryl phenols, diphenyl derivatives, alkyl aryl ethers, esters, and others. Among the diluents examined, n ‐butyl alcohol, p‐tert ‐butyl phenol, p‐tert ‐amyl p…
Study of the Solubility Limits of the Compound TiCo Using High-Temperature X-Ray Diffractometry
An experimental study of the TiCo/TiCo+Ti2Co and TiCo/TiCo+TiCo2 phase boundaries has been carried out using high-temperature x-ray diffractometry. The results, together with the result of an approximate mp determination, have been used to delineate the TiCo phase field. By combining this information with the results…
Correlation of physical and polymer chain properties
Abstract An idealized polymer model is used to examine the magnitude of the catastrophic tensile breaking energy and stress in terms of primary and secondary bonding forces. Computed strengths for primary and secondary bonding are respectively 8000 and 500 times larger than observed values of a common thermoplastic. F…
Some Physical Properties of Electrical Discharges on Contaminated-Surfaces
The various discharge phenomena caused by contamination of insulator surfaces were investigated by means of slow and fast oscillographic recordings of the discharge current. It was found that the surface discharges have distinct stages of development. The visual manifestations were recorded simultaneously with the cur…
Electron impact and thermal fragmentation of biphenylene
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron impact and thermal fragmentation of biphenyleneLester Friedman and Donald F. LindowCite this: J. Am. Chem. Soc. 1968, 90, 9, 2324–2328Publication Date (Print):April 1, 1968Publication History Published online1 May 2002Published inissue 1 April 1968https://pubs.acs.o…
The variance and other measures of line broadening in powder diffractometry. I. Practical considerations
In any attempt to interpret broadened X-ray diffraction peaks in terms of imperfections in polycrystalline specimens, particular attention should be paid to experimental technique and the method of collecting data. The experimental conditions should be arranged to give maximum intensity in as short a time as possible,…
Prediction of the Quality of Blended Yarns from That of the Individual Components
An expression is derived for the strength of the blended yarn spun at optimum twist, in terms of the strengths of yarns spun from the two components at optimum twist. Good agreement between the predicted and observed values is found over a range of cottons and counts. The strength deficiency of the blended yarn is par…
Experiments in Modern Physics
"Experiments in Modern Physics." Nuclear Science and Engineering, 32(1), pp. 153–154
Neue Alkalichlorocadmate(II) in den Systemen CsCl/CdCl2 und RbCl/CdCl2
Abstract Die Systeme CsCl/CdCl 2 und RbCl/CdCl 2 wurden mit den Methoden der Differentialthermoanalyse neu untersucht. Zusätzlich zu den schon bekannten Doppelchloriden wurden die Verbindungen Cs 3 CdCl 5 , βCs 2 CdCl 4 , Cs 3 Cd 2 Cl 7 , CsCd 5 Cl 11 , Rb 4 Cd 3 Cl 10 und RbCd 5 Cl 11 gefunden. Cs 3 CdCl 5 und βCs…
Natural frequencies of clamped cylindrical shells.
E = modulus of elasticity p = mass density v = Poisson's ratio a = mean radius of shell L = length of shell h = thickness of shell x, 4> = axial and circumferential coordinates of shell t = time co = circular frequency m = number of circumferential waves around shell u, v, w = displacements of a point on the middle su…
Surface of a carbon with sorbed oxygen on pyrolysis
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface of a carbon with sorbed oxygen on pyrolysisMarcellus T. Coltharp and Norman HackermanCite this: J. Phys. Chem. 1968, 72, 4, 1171–1177Publication Date (Print):April 1, 1968Publication History Published online1 May 2002Published inissue 1 April 1968https://pubs.acs.org…
A M$ouml$ssbauer and X-ray diffraction study on the cation distribution in FeAl2O4
The Mössbauer spectrum of FeAl 2 O 4 consists of three absorption peaks at 0, 1.46 and 2.56 mm s -1 relative to a 57 Co/Cu source. The spectrum can be resolved into two quadrupole-split spectra. The outer pair of lines corresponds to a quadrupole splitting of 2.76±0.10 mm s -1 and an isomer shift of 1.52±0.10 mm s -1…
Über einige quaternäre Chalkogenide mit Spinellstruktur
Abstract Die Verbindungen CuAlSnS 4 , CuInSnS 4 , CuCrSnS 4 , AgInSnS 4 , AgCrSnS 4 , CuCrTiS 4 , CuCrZrS 4 , CuCrHfS 4 , CuCrSnSe 4 , CuCrTiSe 4 , CuCrZrSe 4 , CuCrHfSe 4 und AgCrSnSe 4 wurden durch Synthese aus den Elementen bei Temperaturen zwischen 500 und 1000°C dargestellt. Sie kristallisieren im Spinelltyp, wob…
Diffusion in Commercially Manufactured Pelleted Catalysts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiffusion in Commercially Manufactured Pelleted CatalystsC. N. Satterfield and P. J. CadleCite this: Ind. Eng. Chem. Proc. Des. Dev. 1968, 7, 2, 256–260Publication Date (Print):April 1, 1968Publication History Published online1 May 2002Published inissue 1 April 1968https://p…
Neutron and X-Ray Diffraction Study of Ca3Al2(O4D4)3, a Garnetoid
Deuterated hydrogrossular, Ca3Al2(O4D4)3, has been prepared in order to investigate, by neutron and x-ray diffraction, the isomorphic substitution of (O4H4)4− for (SiO4)4 −. A polycrystalline specimen yielded the cubic-cell edge, 12.5755 ± 0.0009 Å (28°C) and oxygen parameters x = 0.0303(3); y = 0.0547(4); z = 0.6430(…
Ordered Arrangement of Oxygen in the Interstitial Solid Solution of Zirconium-Oxygen System
The crystal structure of interstitial solid solution of zirconium-oxygen system was investigated by means of X-ray, electron and neutron diffraction on specimens in the composition range between 11 and 27 at% O. The specimens were prepared by melting appropriate mixtures of zirconium metal and zirconium dioxide in an…