Materials Literature
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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…
The existence range of the one-dimensional long-period ordered alloy Cu 3 Pt (L1 2- s ) on the equilibrium diagram has been determined by X-ray diffraction, single crystal specimens having been prepared and quenched at various temperatures. As the result it has become clear that there occurs a two-step transition L1 2…
<div class="htmlview paragraph">The dent resistance of cold-rolled low-carbon steel sheets is shown to be proportional to the product of the yield strength and the square of the thickness. However, the yield-strength value used in this relation must be the yield strength appropriate to the strain rate of the par…
Knoop hardness is examined as a function of indenter orientation on the (0001), {10 0} and {11 0} surfaces of TiB 2 , ZrB 2 and HfB 2 . The hardness of the two kinds of prismatic planes and the hardness anisotropy of each plane are higher than those of the basal plane in TiB 2 . The hardness of the basal plane tends t…
The effect of varying electron concentration on the magnetic ordering in the ternary intermetallic compounds DyCo3−xNix, DyFe3−xNix, HoCo3−xNix, HoFe3−xNix, with 0&lt;x&lt;3, has been investigated by saturation magnetization studies. The results show a filling of the Co and Fe bands and also a polarization of…