Composites from melts

Composites from Melts A New Class of SHG-Active Materials... 

System in which the solid phases consist of the pure components and the components are completely miscible in the liquid phase. We may now conveniently consider the general case of a system in which the two components A and B are completely miscible in the liquid state and the solid phases consist of the pure components. The equilibrium diagram is shown in Fig. 1,12, 1. Here the points A and B are the melting points of the pure components A and B respectively. If the freezing points of a series of liquid mixtures, varying in composition from pure A to pure B, are determined, the two curves represented by AC and BC will be obtained. The curve AC expresses the compositions of solutions which are in equilibrium, at different temperatures, with the solid component A, and, likewise, the curve BC denotes the compositions... 

T. K. Rakhmamllin, F. A. Agzamov, V. V. Ivanov, N. Kh. Karimov, M. A. Tankibaev, and N. V. Trenkenshu. Clinker-less binder composition—contains mixture of slag from melting of oxidised nickel ores and tails from enrichment of phosphorite ores. Patent SU 1777617-A, 1992. 

Turner S, McDermott F, Hawkesworth C, Kepezhinskas P (1998) A U-series study of lavas from Kamchatka and the Alentians constraints on somce composition and melting processes. Contrib Mineral Petrol 133 217-234... 

Bulk Ag-Al alloys, containing up to 12 a/o Al, were electrodeposited from melt containing benzene as a co-solvent. Examination by x-ray diffraction (XRD) indicated that the low-Al deposits were single-phase fee Ag solid solutions whereas those approaching 12 a/o were two-phase, fee Ag and hep i>-Ag2Al. The composition at which ti-Ag2Al first nucleates was not determined. The maximum solubility of aluminum in fee silver is about 20.4 a/o at 450 °C [20] and is reduced to about 7 a/o at room temperature. One would expect the lattice parameter of the fee phase to decrease only slightly when aluminum alloys substitutionally with silver because the... 

Moffat [80] reported the electrodeposition of Ni-Al alloy from solutions of Ni(II) in the 66.7 m/o AlCl3-NaCl melt at 150 °C. The results obtained in this melt system are very similar to those found in the AlCh-EtMcImCI melt. For example, Ni deposits at the mass-transport-limited rate during the co-deposition of Al, and the co-deposition of Al commences several hundred millivolts positive of the thermodynamic potential for the A1(III)/A1 couple. A significant difference between the voltammetric-derived compositions from the AlCl3-NaCl melt and AlCl3-EtMeImCl melt is that alloy composition is independent of Ni(II) concentration at the elevated temperature. Similar to what has been observed for room-temperature Cu-Al, the rate of the aluminum partial reaction is first order in the Ni(II) concentration. Moffat s... 

Figure 17 shows a portion of the composition-phase distribution obtained from Ca-Au-Ga samples that were either slowly cooled from melts or annealed at 500° C for 3 weeks and quenched. Both ACs have considerable phase widths in Au/Ga proportions relative to previous studies, as reflected in the variations of lattice parameters [14.6732(7)-14.790( 1) A for the 1/1 AC and 23.8829(9)-23.9816(9) A for the 2/1... 

It should be emphasized that the deviations from the logarithmic correlation obey the normal distribution statistics, allowing one to apply convenient statistical procedures to analytical measurement results. As will be shown below, the logarithmic linear correlation rule was observed for all types of geo-chemical samples, i. e., snow, air, water, and soil. The correlation analysis of the elemental composition of melted-snow fractions showed with confidence level 95% that no significant discrepancy exists between the element composition within the correlation curves (see Table 1) and the corresponding variances are thus homogeneous for any two randomly chosen samples (i. e., points of the territory). 

Since we know the source composition, partition coefficients and phase abundances in molten sources, we can calculate the synthetic melt and mineral concentrations using equation (9.2.2). The five 4x3 matrices Ak can be built the first column of Table 9.4 is made of the melt concentrations ( lavas ). Mineral concentrations in the next two columns are computed from melt concentrations using the appropriate mineral liquid partition coefficients. High precision is needed to ensure accurate inversion. 

Determination of compositions of melts segregated from peridotite using aggregates of diamond. Earth Planet. Sci. Letters, 114, 477-89. 

Figure 6.18. In-As phase diagram (at constrained pressure). Notice, (similarly to other III/V phase diagrams) the formation of the congruently melting 1 1 compound which gives two eutectics. The eutectic with In is practically coincident with In. As a consequence, for all the compositions from 0 up to 50 at.% As the primary crystallization of InAs may he obtained.

Fig. 3.46 (a) The temperature of melting and decomposition peaks of NaBH for all composites from Figs. 3.44 and 3.45 as a function of the MgH content. Numbers in parenthesis show the number of multiple data points for this specific composition. Data for the (NaBH + Xwt%Mg) mixtures where Xwt% is an equivalent amount of Mg corresponding to the Mg decomposed from Xwt%MgHj are also included, (b) Analysis of the yield of MgB based on the Vajo et al. [196-198] model adopted for the (NaBH + MgH ) system... 

The shape of moving boundary of crystals was different if the composition of melt mixture was changed. When pure benzene was compressed, the shape of moving boundcu y of crystal was roundish. The fringe shape made 1 90.0 mole percent benzene was slightly sharp, and the crystals formed from the melt 80.0 and 70.0 mole percent benzene had sharper moving boundary. But the details of these difference are not clear and future studies are expected. 

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