Study of the phase diagram of titanium-rich alloys of the system Ti-Al
Phase diagram of titanium-rich aluminum alloys, using thermal, microstructural, dilatometric, and X-ray analyses
TITANIUM ALLOY↗
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Phase Diagram of HgTe -ZnTe Pseudobinary and Density, Heat Capacity, and Enthalphy of Mixing of Hg(sub 1-x)Zn(sub x)Te Pseudobinary Melts
In this article, the solidus temperatures of the Hg(sub 1-x) Zn(sub x)Te pseudobinary phase diagram for several compositions in the low x region were measured by differential thermal analysis and the HgTe-ZnTe pseudobinary phase diagram was constructed. The densities of two HgZnTe melts, x = 0.10 and 0.16, were determined by an in situ pycnometric technique in a transparent furnace over, respectively, 110 and 50 C ranges of temperature. The thermodynamic properties of the melts, such as the heat capacity and enthalpy of mixing, were calculated for temperatures between the liquidus and 1500 C by assuming an associated solution model for the liquid phase.
Su, Ching-Hua↗
Determination of the Fe-Ni phase diagram below 400 C
Analytical EM techniques have been used to obtain a phase diagram for the Fe-Ni system below 400 C in the composition range from 0-52 wt pct Ni. The present diagram is consistent with all the phases observed in the Fe-Ni regions of meteorites. An asymmetric spinodal decomposition results in the expected two-phase isotropic microstructure. The present experimentally-determined miscibility gap below 400 C, located between 11.7 and 51.9 wt pct Ni at 200 C, is shown to be wider than the calculated miscibility gap.
Reuter, K. B.↗
Phase diagrams and microscopic structures of (Hg,Cd)Te, (Hg,Zn)Te, and (Cd,Zn)Te alloys
A cluster theory based on the quasi-chemical approximation has been applied to study the local correlation bond-length distribution, and phase diagrams of the II-VI pseudobinary alloys Hg(1 - x)Cd(x)Te, Hg(1 - x)Zn(x)Te, and Cd(1 - x)Zn(x)Te. The cluster energy is calculated by letting it relax in some effective alloy medium and then considering the contributions from the strain and chemical energies. Two different models are presented to simulate the alloy medium. While both models show that all three alloys have nearly random distributions, the signs of the local correlation prove to be sensitive to the alloy medium chosen for the energy calculation. Good agreement is found between experiment and the bond lengths and phase diagrams in both models.
Patrick, R. S.↗
Investigation of the partial phase diagram of the Ti-Al-Cr-Fe-Si-B system /section with 3 percent of Al/
Partial phase diagram of titanium chromium iron silicon boron system
CHROMIUM ALLOY↗
Cross section of the phase diagram of the system Al-Cu-Cd-Mn with a constant manganese concentration at 500 deg C
Phase diagram cross section of aluminum copper cadmium manganese system with constant manganese concentration at 500 C
MANGANESE↗
Investigation of the partial phase diagram of the Ti-Al-Cr-Fe-Si-B system of alloys containing 6 percent of Al
Partial phase diagram of titanium aluminum chromium iron silicon boron system
CHROMIUM ALLOY↗
Ternary phase diagrams for the Ga-P-Zn and Ga-As-Zn systems with applications to diffusion problems
Ternary phase diagrams for gallium-phosphorus-zinc and gallium-arsenic-zinc systems with diffusion problem applications
ZINC↗
Phase Diagram of the Ir-Sb System on the Antimony-Rich Part
The antimony-rich iridium antimony phase diagram was investigated by means of differential thermal analysis, microprobe analysis, metallography and X-ray powder diffractions.
iridium antimony phase diagram↗
Constructing multicomponent phase diagrams by overlapping ZPF lines
A procedure is introduced which can be used to draw isothermal sections from a multicomponent phase diagram in a matter of minutes, regardless of the diagram complexity. In the proposed method, the zero phase fraction (ZPF) lines are drawn separately for all phases existing in the system; by overlapping these ZPF lines, the desired section is obtained. Two examples - with five components and eight components - are given to illustrate the method. Regarding the second example, it is noted that although the final diagram may be altered to create discontinuities in slope at intersection points, the diagram remains unchanged from a topological standpoint. Thus, the overlapping ZPF lines supply all the information needed to construct complex diagrams. Even if many more phases and components are involved, the final diagram can be drawn with equal facility.
Gupta, H.↗
Phase diagram of the system Ti-P
Physicochemical determination of interaction between titanium and phosphorus in mixture containing up to 45 atomic percent phosphorus - phase diagram of titanium phosphorus system
PHASE DIAGRAM↗
Predicting ternary phase diagrams and quaternary excess free-energy using binary data
Ternary phase diagrams and quaternary excess free energy prediction using binary data, applied to Pb-Sn-Zn, Ag-Pd-Cu and Pb-Sn-Cd-Bi systems
Olson, N. J.↗
Thermochemistry of Cesium-oxygen Solutions and Their Gaseous Atmospheres, Estimated from a Phase Diagram
Thermochemistry of cesium-oxygen solutions and their gaseous atmospheres estimated from phase diagram
Tower, L. K.↗
Phase diagram and electrical behavior of silicon-rich iridium silicide compounds
The iridium-silicon phase diagram on the silicon-rich side was investigated by means of X-ray powder diffraction, density, differential thermal analysis, metalography, microprobe analysis, and electrical resistivity. Attempts were made to prepare eight previously reported silicon-rich iridium silicide compounds by arc melting and Bridgman-like growth. However, microprobe analysis identified only four distinct compositions: IrSi, Ir3Si4, Ir3Si5 and IrSi sub about 3. The existence of Ir4Si5 could not be confirmed in this study, even though the crystal structure has been previously reported. Differential thermal analysis (DTA) in conjunction with X-ray powder diffraction confirm polymorphism in IrSi sub about 3, determined to have orthorhombic and monoclinic unit cells in the high and low temperature forms. A eutectic composition alloy of 83 +/- 1 atomic percent silicon was observed between IrSi sub about 3 and silicon. Ir3Si4 exhibits distinct metallic behavior while Ir3Si5 is semiconducting. Both and IrSi and IrSi sub about 3 exhibit nearly temperature independent electrical resistivities on the order of 5-10 x 10 exp -6 ohms-m.
Allevato, C. E.↗
Determination of the phase diagram for carbon tetrabromide and hexachloroethane
Differential scanning calorimetry is used to determine the binary eutectic phase diagram of the CBr4/C2Cl6 system and measure the enthalpies of fusion of various compositions. The eutectic composition and temperature are found to be 8.4 + or - 0.1 weight percent C2Cl67 and 83 + or - 0.1 C, respectively. A micrograph showing the coarse lamellar structure at the interface is provided.
Kaukler, W. F.↗
The ammonia-water phase diagram and its implications for icy satellites
A Holzapfel-type diamond anvil cell is used to determine the NH3 - H2O phase diagram in the region from 0 to 33 mole percent NH3, 240 to 370 K, and 0 to 5 GPa. The following phases were identified: liquid; water ices Ih, III, V, VI, VII, and VIII; ammonia monohydrate, NH3.H2O; and ammonia dihydrate NH3.2H2O. Ammonia dihydrate becomes prominent at moderate pressures (less than 1 GPa), with planetologically significant implications, including the possibility of layering in Titan's magma ocean.
Johnson, M. L.↗
The ammonia-water phase diagram and its implications for icy satellites
A Holzapfel-type diamond anvil cell is used to determine the NH3 - H2O phase diagram in the region from 0 to 33 mole percent NH3, 240 to 370 K, and 0 to 5 GPa. The following phases were identified: liquid; water ices Ih, III, V, VI, VII, and VIII; ammonia monohydrate, NH3.H2O; and ammonia dihydrate NH3.2H2O. Ammonia dihydrate becomes prominent at moderate pressures (less than 1 GPa), with planetologically significant implications, including the possibility of layering in Titan's magma ocean.
Johnson, Mary L.↗
Phase diagram for ammonia-water mixtures at high pressures - Implications for icy satellites
The (NH3)x(H2O)1-x phase diagram for X from 0 to 0.50 has been reexamined at temperatures from 125 K to 400 K and at pressures from 6.0 GPa using diamond anvil cells, and the implications of the findings for icy satellites are addressed. Titan is likely to have a thicker NH3-H2O ocean than previously suspected, because the stability field of NH3-H2O is found to be smaller than previously supposed. The implications for methane and ammonia volcanism on Titan are briefly discussed. The experimentally observed reactivity between the liquid and iron may also have implications for planetary and satellite evolution.
Cynn, H. C.↗