scholarly journals Phase Equilibria of the Co-Ti-Ta Ternary System

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 958 ◽  
Author(s):  
Cuiping Wang ◽  
Xianjie Zhang ◽  
Lingling Li ◽  
Yunwei Pan ◽  
Yuechao Chen ◽  
...  
Keyword(s):  
Solid Solution ◽  
Ternary System ◽  
Phase Equilibria ◽  
Solid Solutions ◽  
Electron Probe ◽  
Continuous Solid Solution ◽  
X Ray Diffraction ◽  
Isothermal Sections ◽  
X Ray ◽  
Electron Probe Microanalyzer

The phase equilibria of the Co-Ti-Ta ternary system at 1000 °C, 1100 °C, and 1200 °C were experimentally investigated using an electron probe microanalyzer and X-ray diffraction. Experimental results show that: (1) No ternary compound exists in the studied isothermal sections; (2) the β(Ti) and β(Ta) phases form the continuous solid solution β(Ti,Ta) in the Ti-Ta side; (3) the solubility of Ta in the (αCo) is less than 5%; (4) the phases of Co2Ti(h) and γ-Co2Ta, Co2Ti(c) and β-Co2Ta form the continuous solid solutions Co2(Ta,Ti)(h) and Co2(Ta,Ti)(c), respectively.

Phase relationships in the Ce–Nd–B system at 773 K

2020 ◽  
Vol 111 (6) ◽  
pp. 526-532
Author(s):  
Xuehong Cui ◽  
Jinming Zhu ◽  
Ketong Luo ◽  
Jianlie Liang
Keyword(s):  
Solid Solution ◽  
Ternary System ◽  
Continuous Solid Solution ◽  
Solution Phase ◽  
Solid Solution Phase ◽  
X Ray Diffraction ◽  
Two Phase ◽  
X Ray ◽  
Three Phase ◽  
Phase Relationships

Abstract Phase relationships in the Ce-Nd-B ternary system at 773 K were investigated by means of X-ray diffraction and scanning electron microscopy with energy dispersive X-ray spectroscopy techniques. Six borides, i. e. CeB4, CeB6, NdB4, NdB6, NdB66 and Nd2B5 are confirmed in this work. No ternary compound was observed. CeB4 and NdB4 were discovered to form the continuous solid solution phase (Ce,Nd)B4, CeB6 and NdB6 also form the solid solution phase (Ce,Nd)B6. The maximum solid solubility of Ce in (Ce,Nd)2B5 phase is 46.5 at.%. The isothermal section of the Ce-Nd-B ternary system at 773 K consists of 3 three-phase regions, 7 two-phase regions and 7 single- phase regions.

Phase equilibria and crystal chemistry in the Y2O3–Al2O3–SiO2 system

1999 ◽  
Vol 14 (2) ◽  
pp. 447-455 ◽  
Author(s):  
U. Kolitsch ◽  
H. J. Seifert ◽  
T. Ludwig ◽  
F. Aldinger
Keyword(s):  
Phase Equilibria ◽  
Electron Probe ◽  
Eutectic Temperature ◽  
Ternary Eutectic ◽  
Ternary Solid Solution ◽  
Temperature Differential ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Electron Probe Microanalyzer

In order to clarify inconsistencies in the literature and to verify assumed ternary solubilities, the phase equilibria in the Y2O3–Al2O3 –SiO2 system at 1600, 1400, and 1300 °C were experimentally determined using x-ray diffraction (XRD), scanning electron microscope with attached energy-dispersive detector system (SEM-EDX), and electron probe microanalyzer (EPMA). Six quasibinary phases were observed: Y4Al2O9 (YAM), YAlO3 (YAP), Y3Al5O12 (YAG), Y2SiO5, Y2Si2O7 (C and D modifications), and ˜3Al2O3· 2SiO2 (mullite). Y4Al2O9 forms an extended ternary solid solution with the formula Y4Al2(1-x)Si2xO9+x (x = 0 2 ˜0.31). The lowest ternary eutectic temperature was determined at 1371 ± 5 °C by high-temperature differential scanning calorimetry (DSC). The results were compared with previous data available for the Y2O3–Al2O3 –SiO2 system and with data for other RE2O3–Al2O3 –SiO2 (RE = rare earth element) systems.

scholarly journals PHASE EQUILIBRIA OF THE PbBi2Te4–"PbSb2Te4" SECTION OF THE PbTe–Bi2Te3–Sb2Te3 SYSTEM AND SOME PROPERTIES OF THE SOLID SOLUTIONS

2020 ◽  
pp. 53-59
Author(s):  
A.I. Aghazade ◽  
Keyword(s):  
Solid Solution ◽  
Phase Equilibrium ◽  
Phase Equilibria ◽  
Solid Solutions ◽  
Solid Phase ◽  
Equilibrium Diagram ◽  
Experimental Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solid Phase Equilibrium

PbTe–Bi2Te3–Sb2Te3 system has been studied by DTA and X-ray diffraction methods along the PbBi2Te4 – "PbSb2Te4" section. It was found that the compound of the composition PbSb2Te4, specified in the literature does not exist. On the basis of the latter a wide (more than 50 mol%) area of solid solution (γ) was detected. By using obtained experimental results, a fragment of the solid-phase equilibrium diagram of the PbTe–Bi2Te3–Sb2Te3 system was constructed and boundaries of the heterogeneous areas α+γ, α+β, α+β+γ (α- and β- are solid solutions based on PbTe and Sb2Te3, respectively) have been determined

scholarly journals Experimental Investigation of Phase Equilibria in the Co-Re-Ta Ternary System

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 911 ◽  
Author(s):  
Xingjun Liu ◽  
Dan Wu ◽  
Jinbin Zhang ◽  
Mujin Yang ◽  
Jiahua Zhu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
High Temperature ◽  
Ternary System ◽  
Electron Probe ◽  
X Ray Diffraction ◽  
Phase 3 ◽  
Isothermal Sections ◽  
X Ray ◽  
High Temperature Alloys ◽  
Thermodynamic Databases

In this study, the isothermal sections of the Co-Re-Ta ternary system at 1100, 1200, and 1300 °C have been experimentally investigated by means of electron probe microanalysis and X-ray diffraction. The results indicated the following: (1) The solid solubilities of the λ3, (εCo, Re), χ-Re7Ta3, and bcc-(Ta) phases were large and changed very little from 1100 to 1300 °C; (2) more interestingly, the λ2 phase, with a very limited solubility of Re, was surrounded by the λ3 phase; (3) the solubility of Re for the μ-Co6Ta7 phase increased slowly from 1100 to 1300 °C. These experimental results will be useful for Co-based high-temperature alloys, especially as a supplement for thermodynamic databases.

scholarly journals Synthesis of Ce1−xPdxO2−δ Solid Solution in Molten Nitrate

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 640
Author(s):  
Hideaki Sasaki ◽  
Keisuke Sakamoto ◽  
Masami Mori ◽  
Tatsuaki Sakamoto
Keyword(s):  
Electron Microscopy ◽  
Solid Solution ◽  
Solid Solutions ◽  
Photoelectron Spectroscopy ◽  
Synthesis Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Co Precipitation ◽  
Ionic States

CeO2-based solid solutions in which Pd partially substitutes for Ce attract considerable attention, owing to their high catalytic performances. In this study, the solid solution (Ce1−xPdxO2−δ) with a high Pd content (x ~ 0.2) was synthesized through co-precipitation under oxidative conditions using molten nitrate, and its structure and thermal decomposition were examined. The characteristics of the solid solution, such as the change in a lattice constant, inhibition of sintering, and ionic states, were examined using X-ray diffraction (XRD), scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM−EDS), transmission electron microscopy (TEM)−EDS, and X-ray photoelectron spectroscopy (XPS). The synthesis method proposed in this study appears suitable for the easy preparation of CeO2 solid solutions with a high Pd content.

scholarly journals SOLUBILITY OF GERMANIUM DISELENIDE IN THE Cu3AsSe4

2021 ◽  
Vol 0 (4) ◽  
pp. 67-70
Author(s):  
Z.T. Hasanova ◽  
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Phase Equilibria ◽  
Solid Solutions ◽  
X Ray Diffraction ◽  
X Ray

Differential thermal analysis and powder X-ray diffraction methods were used for phase equilibria studying in the Cu3AsSe4-GeSe2 system. It was established that wide (up to 30 mol.%) solid solutions based on Cu3AsSe4 are formed. GeSe2-rich alloys consist of various heterogeneous mixtures, including phases outside the T–x plane of this section

Solid solutions in the system Ag2S–Ag2Se

1992 ◽  
Vol 7 (8) ◽  
pp. 2219-2224 ◽  
Author(s):  
N.E. Pingitore ◽  
B.F. Ponce ◽  
M.P. Eastman ◽  
F. Moreno ◽  
C. Podpora
Keyword(s):  
Solid Solution ◽  
Solid Solutions ◽  
Type Structure ◽  
Solid Solution Series ◽  
X Ray Diffraction ◽  
Compositional Gradient ◽  
X Ray ◽  
Optical Electron ◽  
Discrete Phase ◽  
Diffraction Peaks

Optical, electron microprobe, and x-ray diffraction analysis of 88 samples of various compositions between Ag2S and Ag2Se synthesized at high temperature in sealed quartz tubing indicates the presence of two solid-solution series in this system at ambient (room) conditions. One series extends from Ag2S to approximately Ag2S0.4Se0.7 and has the Ag2S-III-type structure (monoclinic). The second series ranges from Ag2S0.3Se0.7 to Ag2Se and is characterized by the Ag2Se-II-type structure (orthorhombic). Members of both series, in appropriate proportions, characterize the apparent compositional gap between the two solid solutions. Gradual shifts in the locations of the x-ray diffraction peaks along the compositional gradient of each solid solution revealed an expansion of the d-spacing as the larger Se ion was substituted for S in the Ag2S-III-type structure and a contraction as S was substituted for Se in the Ag2Se-II-type structure. The reported discrete phase, Ag4SSe (aguilarite, orthorhombic), appears to be simply a member of the monoclinic Ag2S-III-type solid solution.

Phase equilibria and solidification behavior in the PbF2−AlF3 system

1991 ◽  
Vol 6 (10) ◽  
pp. 2188-2192 ◽  
Author(s):  
Linda V. Moulton ◽  
Robert S. Feigelson
Keyword(s):  
Solid Solution ◽  
Phase Equilibria ◽  
Directional Solidification ◽  
Microprobe Analysis ◽  
Binary Phase Diagram ◽  
Peritectoid Reaction ◽  
Solidification Behavior ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Relationship

The relationship between phase equilibria in the PbF2−AlF3 system and the solidification behavior of several ternary lead aluminum fluoride compounds was explored. A partial binary phase diagram for the PbF2−AlF3 system was determined from differential thermal analysis, annealing and directional solidification studies. The compounds AlF3, Pb3Al2F12, Pb9Al2F24, and a PbF2 solid solution were identified by x-ray diffraction, energy dispersive and microprobe analysis. The previously reported phases PbAlF5 and PbAl2F8 were not observed. Directional solidification studies showed that it is possible to grow crystals of AlF3, Pb3Al2F12, and the PbF2 solid solution from nonstoichiometric PbF2−AlF3 melts. The compound Pb9Al2F24 was found to decompose on heating by a peritectoid reaction (forming two other solids) and thus could not be solidified directly from a PbF2−AlF3 melt.

Phase equilibria in the BaTiO3–La2TiO5–TiO2 system

1998 ◽  
Vol 13 (5) ◽  
pp. 1327-1334 ◽  
Author(s):  
Srečo Škapin ◽  
Drago Kolar ◽  
Danilo Suvorov ◽  
Zoran Samardžija
Keyword(s):  
Solid Solution ◽  
Electron Probe ◽  
Ternary Solid Solution ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Binary Solid Solution ◽  
Subsolidus Phase ◽  
X Ray ◽  
Tie Lines ◽  
Scanning Electron

Subsolidus phase relations in the BaTiO3–La2TiO5–TiO2 part of the ternary BaO–La2O3–TiO2 system at 1300 °C in air were determined. The phases were characterized by x-ray diffraction, scanning electron microscopy, and electron probe wavelength dispersive spectroscopic microanalysis. A combination of techniques was employed because of insensitivity in detecting secondary phases by x-ray diffraction. The location and extent of Ba6−xLa8+2x/3Ti18O54 ternary solid solution 0.2(1) ⩽ x ⩽ 2.3(1) and Ba1−yLayTi1−y/4 (VTi)y/4O3 binary solid solution 0 ⩽ y ⩽ 0.3 at 1300 °C was established. Tie lines between various barium polytitanates with a sequence of Ba6−xLa8+2x/3Ti18O54 solid solution regions were determined.

Phase Equilibria in the BaO-SiO2-Al2O3 Ternary System at 1500 °C

2016 ◽  
Vol 697 ◽  
pp. 565-571 ◽  
Author(s):  
Rui Zhang ◽  
Pekka Taskinen
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ternary System ◽  
Phase Equilibria ◽  
Ternary Compound ◽  
Energy Dispersive Analysis ◽  
Liquidus Composition ◽  
Isothermal Sections ◽  
X Ray ◽  
Scanning Electron

Phase equilibria of the BaO-SiO2-Al2O3 ternary system was experimentally investigated using a quenching technique and analyzed by Scanning Electron Microscopy (SEM) equipped with Energy Dispersive Analysis (EDS) and X-ray Powder Diffraction (XRD). A ternary compound was confirmed in the present work. The liquidus composition in equilibrium with the ternary compound at 1500 °C were quantified. The isothermal sections of the BaO-SiO2-Al2O3 ternary system at 1400 °C, 1500 °C, 1600 °C, and 1700 °C were calculated. Based on the data acquired, the isothermal section at 1500 °C was constructed.

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