Showing papers on "Ternary operation published in 1974"
TL;DR: In this paper, a study of the change in hydrogen sorption properties caused by partially replacing La or Ni in LaNi5 by other metals is presented. But this study assumes that the more stable the original RNi5 compound, the weaker is the tendency to form a rNi5--hydride.
Abstract: Results are given of a study of the change in hydrogen sorption properties caused by partly replacing La or Ni in LaNi5 by other metals. Desorption isotherms at 40 deg C were measured for or Cu, and for La0.8R0.2Ni5, where represents Nd, Gd, Y, and Er, also Th and Zr. Equilibrium hydrogen pressures in the two-phase region can be explained qualitatively by assuming that the more stable the original RNi5 compound, the weaker is the tendency to form a RNi5--hydride, i.e., the higher the equilibrium pressure obtained for the hydride. This assumption which connects the stability of ternary hydrides with the heat of formation of the original compounds can also be formulated in a more quantitative way. This leads to a fair description of the experimental observations for the compounds having the CaCu5 type of structure.
428 citations
TL;DR: In this paper, a simple solution model with Ω=a−bT was used to describe the liquid phase and the solid phase was adequately described using the regular solution model.
336 citations
202 citations
TL;DR: In this article, a method is given to calculate liquidus-solidus phase diagrams involving quaternary III-V solid solutions of the type A x B 1 − x C y D 1 − y.
103 citations
103 citations
81 citations
77 citations
TL;DR: The upper critical fields of some ternary molybdenum sulphides were found to be extremely high as mentioned in this paper, with values above 500 kG for CuMo3S4, SnMo5S6, Pb0.9Mo5.1S6 and SnAl0.5Mo4S6 with Tc approximately 14 K.
Abstract: The upper critical fields of some ternary molybdenum sulphides are found to be extremely high. Extrapolations to low temperatures indicate values above 500 kG for CuMo3S4, SnMo5S6, Pb0.9Mo5.1S6 and SnAl0.5Mo5S6 samples with Tc approximately=14 K.
71 citations
TL;DR: In this paper, two different parametrisations for the prolate and oblate direct fission modes are calculated, and the ratio of the experimental ternary to binary fission yields is qualitatively explained.
67 citations
TL;DR: In this article, the published data on the thermodynamics of dilute liquid copper alloys are reviewed and selected thermodynamic values have been tabulated for binary and ternary alloys.
TL;DR: In this paper, Raman scattering and infrared reflectivity data are presented for AgGaS2, and they provide fairly complete information on the frequencies of the zone-centre lattice vibrations.
Abstract: Raman scattering and infrared reflectivity data are presented for AgGaS2, and they provide fairly complete information on the frequencies of the zone-centre lattice vibrations. Like many ternary semiconductors AgGaS2 has the chalcopyrite structure, and this is treated as a perturbation of the zincblende structure found in binaries such as GaP and ZnS. The probable form of the zine-centre modes in the ternary compounds is studied in detail, partly by considering the form of corresponding modes in the binaries, and partly by drawing a simple analogy with a tetra-atomic linear chain. This leads to the conclusion that in the high-frequency modes of the ternaries both cations are vibrating, in contradiction with previous work. Approximate atomic displacements have been derived for all the zone-centre modes.
TL;DR: In this article, the ternary system lanthanum-uranium-oxygen emf measurements on solid state galvanic cells, coulometric titrations, and X-ray diffraction techniques were used to obtain phase boundaries and thermodynamic data in the temperature range from 600 to 1000°C.
TL;DR: By the addition of phosphorus to the ternary layers of standard double-heterostructure GaAs injection lasers, significant reductions in lasing current threshold and increases in differential quantum efficiency have been obtained as discussed by the authors.
Abstract: By the addition of phosphorus to the ternary layers of standard double‐heterostructure GaAs injection lasers, significant reductions in lasing current threshold and increases in differential quantum efficiency have been obtained. Additional measurements suggest that the improvements are connected with a reduction in optical scattering loss.
01 Apr 1974-Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science
TL;DR: In this paper, the influence of temperature, silica content and CaO/FeO ratio on the structures of ternary iron-calcium silicates is discussed, and structural interpretation of melt density and expansivity has provided information on the nature of the ions present in these systems.
Abstract: The densities of melts in the systems CaO-SiO2, CaO-“FeO,” “FeO”-SiO2 and in ternary melts containing 33 and 44 mole pct SiO2 have been measured from the liquidus temperature to 1600°C. Structural interpretation of melt density and expansivity has provided information on the nature of the ions present in these systems, and, in conjunction with known thermodynamic behavior, has indicated the natures of the interactions occurring among these ions. The influence of temperature, silica content andCaO/FeO ratio on the structures of ternary iron-calcium silicates is discussed.
TL;DR: Using slowly pulsed magnetic fields up to 510 kG, it was shown that some lead-rich ternary molybdenum sulphides have critical fields above 500 kG as discussed by the authors.
Abstract: Using slowly pulsed magnetic fields up to 510 kG it is shown that some lead-rich ternary molybdenum sulphides have critical fields above 500 kG, whereas the Sn-rich compounds have critical fields of the order of 300-400 kG.
TL;DR: In this article, a general ordering principle for derivative structures of ionic polyhedra is proposed, which requires that the smallest building blocks of the structure (centred tetrahedra, octahedra or cubes) have as far as possible a composition identical with the overall composition of the compound.
Abstract: The atom arrangement in ternary and quaternary ionic long-range-ordered derivative structures of ZnS, NaCI, CsCI and others is governed by a principle which is known as Pauling's electrostatic valence rule. This valence rule is actually part of a more general ordering principle for derivative structures, which is not restricted to ionic compounds and requires that the smallest building blocks of the structure (centred tetrahedra, octahedra or cubes) have as far as possible a composition identical with the overall composition of the compound. Depending on the type of polyhedron, this rule can be fulfilled only for a limited number of overall compositions. In this case it is possible to produce an analytical formulation of the general ordering principle giving relations amongst the Warren short-range-order parameters. Use of these relations in a structure-factor formula of the binary base structure permits the derivation of the general location (lines, planes or a general surface) of superstructure reflexions or diffuse intensity in reciprocal space for the cases of long-range order or short-range order respectively. With this method it is possible not only to explain the experimentally determined diffuse intensity shapes due to short-range order in NaCl-related structures, but also to predict the diffuse intensity shape for ZnS and CsCl-related structures and others for which no experimental data are yet available.
TL;DR: In this article, the superconducting transition temperature has been investigated as a function of composition and degree of long-range order in a number of binary and ternary A 15-type phases on Cr and Mo.
TL;DR: The existence of a ternary Cu · AMP · amine complex opens a number of new aspects regarding the reactivity of metal ions in the biochemistry of nucleic acids.
Abstract: The formation of a ternary complex using cupric ions, basic amines of biological significance, and nucleotides was examined employing high-resolution nuclear magnetic resonance (NMR) with 13C and 31P and circular dichroism. The reaction of Cu2+ with each ligand was studied separately and as the ternary complex. From 13C-NMR data the assignment of the respective carbon atoms adjacent to a copper-binding atom was clearly shown. It is intriguing to note that even in such a ternary complex the N-7 of the purine ring, as well as the phosphate residue (measured by 13P-NMR spectroscopy) provide the preferred binding sites for the cupric ion. Marked interactions of the chelated cupric ion with the ribose moiety in the ternary complex were deduced from circular dichroic measurements. No such reactivity was seen when dAMP was employed. The existence of a ternary Cu · AMP · amine complex opens a number of new aspects regarding the reactivity of metal ions in the biochemistry of nucleic acids.
01 Nov 1974-Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science
TL;DR: In this paper, the Pb-Sn-Cd ternary eutectic system was used as a suitable model system to completely map the phase morphology as a function of G/R and compositions.
Abstract: The growing interest in composite structures for new material applications makes it necessary to determine just how generally we can apply existing solidification theory to controlled three-phase ternary solidification. The Pb-Sn-Cd ternary eutectic system was used as a suitable model system to completely map the phase morphology as a function of G/R and compositions. By carefully controlling the freezing rate and the thermal gradient in the liquid ahead of the solid-liquid interface (in the range 400 to 500 C/cm) the following areas of interest were investigated: 1) the effect of growth velocity and composition on coupled structures, 2) ternary impurities and their effect on the minimum G/R for coupled growth in a binary system, 3) the effect of growth velocity and composition on the nonplanar interface structures, and 4) the adaptability of present theories (the constitutional supercooling criterion and Cline’s binary analysis) in predicting the region of coupled growth in a three-component eutectic system growing at steady-state. It was found that much of the one and two-phase directional solidification theory and terminology can be directly extended to a ternary eutectic system. This suggests a further extension to n-phase, m-component systems (m ≥ n) with at least a qualitative understanding of the solidification process.
TL;DR: The effect of substituting cobalt with nickel in the ternary alloys is to produce a room-temperature, martensitic structure at approximately the 14% Ni composition as discussed by the authors.
Abstract: As an essential preliminary to the study of the mechanical behaviour and physical properties of some ternary intermediate phases represented by the general formula, Zr 50 Co 50 − x Ni x (where x represents the atomic percent, and varies from 0 to 50), the structure and constitution of these alloys have been investigated. Metallographic examination of the binary ZrCo phase indicates that it melts congruently and there is also evidence of a Widmanstatten-type precipitate and a eutectoid decomposition in the ZrCo phase after certain mechanical and heat treatments. The effect of substituting cobalt with nickel in the ternary alloys is to produce a room-temperature, martensitic structure at approximately the 14% Ni ★ composition. At certain temperatures, appreciable ductility is observed in the range 6–14% Ni and the marked temperature dependence of the mechanical properties is thought to be related to the transformation characteristics of the ternary alloys. The electrical resistivity measurements in the temperature range 77–300 K indicate a possible low-temperature phase transition at the 10 and 12% Ni compositions.
TL;DR: In this paper, the problem of lattice matching In1−xGaxP on a GaAs1−yPy substrate is eased if the ternary is rendered a quaternary by the incorporation of a small amount of As in the LPE layer.
Abstract: Laser operation (77°K) of LPE In1−x Gax P1−zAsz/ GaAs1−yPy (x ∼0.70, y ∼0.40, z ∼0.01) heterojunctions is demonstrated at λ<6300 A. The junctions are prepared by the LPE growth of laser‐quality p‐type In1−x Gax P1−zAsz layers on n‐type VPE GaAs1−yPy substrates. It is found that the problem of lattice matching In1−xGaxP on a GaAs1−yPy substrate is eased if the ternary is rendered a quaternary by the incorporation of a small amount of As in the LPE layer. During growth of the resulting p‐type quaternary layer, Zn diffuses into the n‐type ternary substrate, yielding a thin compensated active region. Laser operation of these devices is obtained at significantly shorter wavelengths and lower thresholds than for comparable homojunctions.
TL;DR: In this paper, the ternary system Ni−Cr−B was established at 1000°C by X-ray diffraction and metallographic examinations and the melting temperatures of binary Ni−B-alloys were established.
Abstract: The ternary system Ni−Cr−B was established at 1000°C by X-ray diffraction and metallographic examinations. Binary chromium resp. nickel borides and two ternary borides Cr3NiB6 and Cr2Ni3B6 were confirmed. Differential thermoanalysis of binary Ni−B-alloys showed the possibility of a metastable solidification according the partial system Ni−Ni2B up to 19 at % B. The melting temperatures of ternary alloys were established.
TL;DR: In this article, a ternary gas mixture in the transition region of diffusion was experimentally investigated in an isobaric open system of fine glass capillaries in parallel, and the flux data for HeNeAr were obtained over a 673/1 pressure range from 0·450 to 303·2 mm Hg abs.
Journal Article•
01 Jan 1974-Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy
TL;DR: In this paper, the model of regular associated solution is applied to the calculation of the T-x ternary liquid-solid phase diagram of Pb-Sn-Se, and a good agreement is obtained with experimental data.
TL;DR: Extensive ternary ion-exchange rate data for cases where particle-diffusion is important are presented in this article, using a single-particle radioactive-tracer technique.
Abstract: Extensive ternary ion-exchange rate data for cases where particle-diffusion is important are presented. Experimental rate data, using a single-particle radioactive-tracer technique, were obtained for the following systems in Dowex 50W-X8 resin: Mn-Cs-Na, Ba-Mn-Na, and Sr-Mn-Cs. Nernst-Planck equations have been used to describe the ternary ion-exchange kinetics. The Nernst-Planck model, when used for the correlation of binary and various types of ternary exchange data obtained under unfavorable equilibrium conditions, usually cannot afford to disregard liquid-film resistance. The model incorporating the film effects correlated satisfactorily most of the experimental data, and even in cases where the correlation was not good, it interpreted adequately the trend of the results.
01 Apr 1974-Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science
TL;DR: Mathematical solutions and experimental results are presented which describe solute redistribution during cellular or dendritic solidification at highG/R (thermal gradient divided by growth rate) of binary and ternary alloys.
Abstract: Mathematical solutions and experimental results are presented which describe solute redistribution during cellular or dendritic solidification at highG/R (thermal gradient divided by growth rate) of binary and ternary alloys. The solutions assume negligible constitutional supercooling in the vicinity of the growing cells or dendrites and negligible effects of curvature and interface kinetics. Data are in the form of measurements of tip temperature and composition, and, for the ternary system, temperature at which two-phase cells or dendrites start to form. In all cases agreement between experiment and theory is good.
TL;DR: In this article, the phonon spectra of ZnGeP2 and CdGeP 2 were determined by Raman scattering on single crystals at room and liquid nitrogen temperature, and the close coincidence of the zone center phonon energies with the corresponding τ, X, and W modes of its GaP analogue, bears out the expected similarity of lattice vibrations in ternary chalcopyrite compounds and binary zincblende materials.
Abstract: The phonon spectra of ZnGeP2 and CdGeP2, determined by Raman scattering on single crystals at room and liquid nitrogen temperature, are presented. The close coincidence of the zone center phonon energies of ZnGeP2 with the corresponding τ, X, and W modes of its isoelectronic analogue, GaP, bears out the expected similarity of lattice vibrations in ternary chalcopyrite compounds and binary zincblende materials. Differences between ZnGeP, and CdGeP2 can be attributed to mass and force constant differences when Zn is substituted by the heavier Cd atom.