Materials Literature
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The magnetization of single crystals of Eu, Sm, Nd, Pr, and Pr-Nd alloys has been measured in fields up to 37 T (370 kG). The results give new information on the magnetic properties of these metals. Of particular interest is a first-order transition from a nonmagnetic to a metamagnetic phase in double-hexagonal close-…
A method is described for the direct measurement of the shear-alignment angle in a nematic liquid crystal. Results of such measurements are reported for the nematic phases of three compounds: PAA ($p$, ${p}^{\ensuremath{'}}$-azoxydianisole), MBBA ($p$-methoxybenzylidene-${p}^{\ensuremath{'}}\ensuremath{-}n$-butylanili…
An x-ray photoemission study of evaporated Al films has been performed in ultrahigh vacuum. The striking similarity of the valence-band spectrum with computed density of states allows a straightforward interpretation of the results. Core level spectra reveal structures which can be attributed to either inelastically s…
Abstract The behaviour of the ½a<111> screw dislocation core in the presence of an external shear stress on {110} planes has been studied for a variety of effective interionic potentials, each representing a stable b. c. c. lattice. The distortion and motion of the core are described using the concept of…
Phonon pulse propagation has been studied in fused silica at frequencies between 0.4 and 2.0 GHz for temperatures as low as 0.1 K. An increase in attenuation, observed as the incident acoustic intensity is decreased, is attributed to resonant scattering by two-level "tunneling states" intrinsic to glasses.
Reactivity and compatibility studies were carried out on some vanadium base alloys with ceramic fuel materials. The vanadium base alloys studied were V-20%Ti, V-15%Ti-7.5%Cr and V-5%Cr. The fuel materials with which these alloys were put in contact were UC, UN, (U, Ce)N and (U,Ce)(C,N). Experiments were carried out at…
Abstract Cotton sateen fabric was found to react with the 1 : 2 adduct of phosphorus trichloride and N,N‐dimethylformamide (DMF) in DMF or DMF—chloroform solutions at room temperature. During this reaction, the fabric acquired flame resistance. The introduction of as little as 1.2% phospohorus and 0.4% nitrogen, achie…
Silicone rubber rods covered by a polyester fiber mesh were implanted adjacent to either a femoral or carotid artery in 13 dogs. The rods were pulled out eight to ten weeks later and a segment of the carotid or femoral artery was excised and replaced by the newly formed tissue tube. Angiographic studies confirmed the…
Paramagnetic susceptibilities, χ i ( i = a , b , c ) of single crystals of rare-earth orthoferrites RFeO 3 (R=Nd, Sm, Gd, Dy, Er, Yb and Y) were measured along the a , b and c axes at room temperature and 77 K. The main parts of the effective magnetic moments µ eff, i 's were found to originate from rare-earth ions. A…
The copper-rich portion of the copper–manganese–tin system was investigated by X-ray diffraction, electron microprobe, and magnetometric techniques. A model for the ordering taking place in the β phase was established. Two low-temperature phases for the alloy composition Cu2MnSn were identified, and the existence of t…
Adsorption uf particulate solids and synthetic soil on cellulose and synthetic fabrics has been studied by a dynamic method involving high speed rotation of the solid and the substrate in a closed chamber. The results confirm that adhesion, and not mechanical entrapment, is the dominant soiling mechanism. Adsorption o…
A review of application circuits for two-terminal amorphous semiconductor switching devices encompassing both the threshold and memory switches is presented, including brief discussions of device electrical and structural characteristics. The most useful electrical properties of these devices are seen to be the thresh…
The general expression for the potential transmittance of a layer, first derived by Berning and Turner [1], is simplified by the use of approximations applicable to weakly absorbing layers, and then used to describe the optical performance of mirrors and narrow-band filters consisting of such layers. In particular, si…
The performance of threshold- and memory-switching devices is discussed. The threshold devices were prepared by vacuum deposition from the Ge-As-Te-Si system and exhibited threshold voltages over a wide range from less than 2.0 V to greater than 50 V. Lifetimes of the order of 106-108switching operations before failur…
Electron spin resonances in the hexagonal layer type compound NiCl 2 in the ordered state have been studied in detail by using microwaves of 10∼70 GHz regions. Considering the resonance data together with other facts, a possible model for the spin arrangement in NiCl 2 in which spins lie in the c -planes by making adj…
<div class="htmlview paragraph">The sleeve cold-working process for fastener holes is a process that uses a tapered mandrel in conjunction with a disposable, prelubricated split sleeve to compressively prestress a significant zone around a fastener hole. This compressive prestressing offsets the stress concentra…
Abstract Die Strukturen der Blei(II)‐chalkogenid‐halogenide Pb 4 SeBr 6 (Raumgruppe Imm2, a = 4,361, b = 15,780, c = 9,720 Å), Pb 5 S 2 J 6 (C2/m, a = 14,338, b = 4,437, c = 14,552 Å, β = 98,04°) und Pb 7 S 2 Br 10 (P6 3 /m, a = 12,273, c = 4,319 Å) wurden durch Einkristall‐Röntgenuntersuchungen aufgeklärt. Koordinati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRelation between surface tension and dielectric constantCurtis F. HolmesCite this: J. Am. Chem. Soc. 1973, 95, 4, 1014–1016Publication Date (Print):February 1, 1973Publication History Published online1 May 2002Published inissue 1 February 1973https://pubs.acs.org/doi/10.1021…
The optical constants n and k of Inconel alloy films are presented for film thicknesses between 200 and 900 Å for the visible and near infrared spectrum. Values of n and k were determined from ellipsometric measurements and, separately, from reflection and transmission measurements at normal and oblique incidence. Res…
Methods and instrumentation are desnibed for determining the frictional properties of continuous filament textile yarns over a wide speed range and for the measurement of antistatic properties. The effect of guide and fiber surface roughness and speed on friction are presented. A discussion of the stick-slip phenomeno…