scholarly journals RESEARCH CHEMICAL INTERACTIONS IN THE CuTe–As2Te3 SYSTEM

2021 ◽  
pp. 67-71
Author(s):  
I.I. Aliev ◽  
◽  
S.Sh. Ismailova ◽  
M.H. Shakhbazov ◽  
◽  
...  
Keyword(s):  
Phase Diagram ◽  
Phase Analysis ◽  
Solid Solutions ◽  
Chemical Compound ◽  
Eutectic Composition ◽  
State Diagram ◽  
Eutectic Type ◽  
System State ◽  
Chemical Interactions ◽  
X Ray

By the methods of DTA, XRD, MSA, as well as by measuring the microhardness and determining the density of the alloys, the CuTe–As2Te3 system was studied and a phase diagram was constructed. The system state diagram is of the eutectic type and it is characterized by one chemical compound of Cu3As4Te9 composition. Compounds Cu3As4Te9 melts incongruently at 3200C. Solid solutions based on As2Te3 reaches 8 mol %, and based on CuTe solid solutions are practically not installed. Cu3As4Te9 and As2Te3 form an eutectic composition of 45 mol % As2Te3 and temperature 2650C. The results of X-ray phase analysis have shown that the Сu3As4Te9 compounds is crystallized in the tetragonal syngony with lattice parameters: a = 13.86, c = 18.05 Å, Z = 9, ρpyk. = 6.96 g/cm3, ρrent. = 7.06 g/cm3

ФИЗИКО-ХИМИЧЕСКОЕ ИССЛЕДОВАНИЕ СИСТЕМЫ Bi2Te3-Ho2Тe3

2020 ◽  
Vol 3 (11(80)) ◽  
pp. 57-62
Author(s):  
F. Sadygov ◽  
N. Mamedova
Keyword(s):  
Phase Analysis ◽  
Solid Solutions ◽  
State Diagram ◽  
Physicochemical Analysis ◽  
Eutectic Type ◽  
System State ◽  
X Ray ◽  
Tetragonal System ◽  
Binary Eutectic ◽  
Ratio Of Components

The chemical interactions in the Bi2Te3-Ho2Te3 system are investigated by methods of physicochemical analysis (DTA, XRD, MSA, microhardness measurements and density determination), a state diagram is constructed. As a result, it was revealed that the system state diagram is a quasi-binary eutectic type. In the Bi2Te3Ho2Te3 system, in a 1: 1 ratio of components, one ternary compound of the HoBiTe3 composition, incongruently melting at 610°C, is formed. According to the results of X-ray phase analysis, it was found that the HoBiTe3 compound crystallizes in the tetragonal system with lattice parameters: a = 19.99; c = 13.82 Å, Z = 3, density ρpikn. = 7.30 g/cm3 ρrent. = 7.35 g/cm3.On the basis of the initial components, regions of solid solutions were found, which on the basis of Bi2Te3 reach 5 mol % Ho2Te3, and on the basis of Ho2Te3 -3 mol % Bi2Te3. Compounds Bi2Te3 and Ho2Te3 form a eutectic with a composition of 20 mol % Ho2Te3 and a temperature of 465°C.

scholarly journals PHASE DIAGRAM OF THE PB-MNSE SYSTEM

2021 ◽  
pp. 44-48
Author(s):  
T. Kurbanova
Keyword(s):  
Phase Diagram ◽  
Phase Equilibrium ◽  
Cross Section ◽  
Solid Solutions ◽  
Room Temperature ◽  
Eutectic Composition ◽  
State Diagram ◽  
Eutectic Type ◽  
Definition Of ◽  
Physical And Chemical

Methods of physical and chemical analysis (DTA, MSA, RFA, as well as the definition of microhardness and density) studied the phase equilibrium in the system Pb-MnSe and built its state diagram. It is established that the Pb-MnSe system is a quasi-binary cross-section of the triple system Mn-Pb-Se and is of the eutectic type. The components Pb and MnSe form between the degenerate eutectic composition, which corresponds to 3 mol. % MnSe and melts at 310 ° C. It was found that solid solutions on the basis of MnSe in the system at room temperature reach 3.5 mol. % Pb, and solid solutions on the basis of Pb is practically not installed.

X-Ray Diffraction Intensity of Oxife Soild Soultions: Application to Qualitative and Quantitative Phase Analysis

1982 ◽  
Vol 26 ◽  
pp. 119-128 ◽  
Author(s):  
Ronald C. Gehringer ◽  
Gregory J. McCarthy ◽  
R.G. Garvey ◽  
Deane K. Smith
Keyword(s):  
Phase Analysis ◽  
Solid Solutions ◽  
Inorganic Materials ◽  
Quantitative Phase Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cell Parameters ◽  
Qualitative And Quantitative ◽  
Quantitative Analyses ◽  
End Members

Solid solutions are pervasive in minerals and in industrial inorganic materials. The analyst is often called upon to provide qualitative and quantitative X-ray phase analysis for specimens containing solid solutions when all that is available are Powder Diffraction File (PDF) data or commercial standards for the end members. In an earlier paper (1) we presented several examples of substantial errors in accuracy of quantitative analysis that can arise when the crystallinity and composition of the analyte standard do not match those of the analyte in the sample of interest. We recommended that to obtain more accurate quantitative analyses, one should determine the analyte composition (e.g., from XRF on grains seen in a SEM or from comparison of cell parameters with those of the end members) and synthesize an analyte standard with this composition and with a crystallinity approximating that of the analyte (e.g., as determined from peak breadth or α1/ α2 splitting).

Phase diagram of the Nd2Fe14B–Sm2Fe14B pseudo-binary system

2016 ◽  
Vol 49 (1) ◽  
pp. 64-68 ◽  
Author(s):  
Ch. F. Xu ◽  
K. H. Chen ◽  
Z. F. Gu ◽  
L. Y. Cheng ◽  
D. D. Ma ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Phase Diagram ◽  
Binary System ◽  
Solid Solutions ◽  
Structure Parameters ◽  
Rietveld Refinements ◽  
X Ray ◽  
Full Profile ◽  
Cell Volumes ◽  
Scanning Electron

The phase relations in the (1−x)Nd2Fe14B–xSm2Fe14B system over the whole concentration range have been studied by means of X-ray powder diffraction (XRD), differential thermal analysis (DTA) and scanning electron microscopy with energy-dispersive X-ray spectroscopy. Crystal structure parameters for all studied compositions of (Nd1−xSmx)2Fe14B have been determined by full-profile Rietveld refinements. These results revealed that all intermediate alloys of (Nd1−xSmx)2Fe14B are similar to the end member of the investigated system, Nd2Fe14B, with a tetragonal structure (space groupP42/mnm). The formation of continuous solid solutions has been found in this system. The normalized lattice parameters and unit-cell volumes of (Nd1−xSmx)2Fe14B solid solutions decrease linearly with increasing Sm content. The DTA measurements show that the melting temperature of (Nd1−xSmx)2Fe14B increases linearly with increasing Sm content and no metastable phases were detected. Based on the DTA data and XRD results, a tentative phase diagram for the pseudo-binary system Nd2Fe14B–Sm2Fe14B has been constructed.

scholarly journals PHASE DIAGRAM OF THE TlTe–Tl9TmTe6 SYSTEM

2021 ◽  
pp. 18-22
Author(s):  
I.F. Mehdiyeva ◽  
Keyword(s):  
Phase Diagram ◽  
Phase Equilibria ◽  
Solid Solutions ◽  
X Ray Diffraction ◽  
X Ray

Phase equilibria in the TlTe–Tl9TmTe6 system were experimentally studied by methods of differential thermal and powder X-ray diffraction analyses. The system was found to be non-quasibinary due to the incongruent nature of both initial components melting, but it is stable below solidus and is characterized by formation limited solid solutions (2 mol%) based on Tl9TmTe6 are revealed in the system

scholarly journals Experimental Study of the Al-Mg-Sr Phase Diagram at 400°C

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
D. Kevorkov ◽  
M. Medraj ◽  
M. Aljarrah ◽  
Jian Li ◽  
E. Essadiqi ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Experimental Study ◽  
Isothermal Section ◽  
Phase Equilibria ◽  
Phase Analysis ◽  
Solid Solutions ◽  
Intermetallic Phases ◽  
Experimental Literature ◽  
Substitutional Solid Solutions ◽  
Xrd Techniques

The Al-Mg-Sr system is experimentally studied at 400°C using EPMA and XRD techniques. It was determined that the intermetallic phases in the Al-Mg-Sr system have a tendency to form extended substitutional solid solutions. Two ternary phases were found in this system. Solubility limits of binary and ternary phases were determined and the phase equilibria among phases were established. The isothermal section of the Al-Mg-Sr system at 400°C has been constructed using results of the phase analysis and experimental literature data.

The PZT system (PbTixZr1−xO3, 0≤x≤1.0): High temperature X-ray diffraction studies. Complete x-T phase diagram of real solid solutions (Part 3)

2013 ◽  
Vol 39 (3) ◽  
pp. 2889-2901 ◽  
Author(s):  
I.N. Andryushina ◽  
L.A. Reznichenko ◽  
L.A. Shilkina ◽  
K.P. Andryushin ◽  
S.I. Dudkina
Keyword(s):  
Phase Diagram ◽  
High Temperature ◽  
Solid Solutions ◽  
X Ray Diffraction ◽  
X Ray ◽  
T Phase ◽  
Real Solid

Supersaturation Behavior of Al Solid Solutions and its Effect on Tensile Property in Al-7Si-xMg Alloys during Solution Heat Treatment (x: 0.4 and 0.8 Mass%)

2016 ◽  
Vol 877 ◽  
pp. 73-77
Author(s):  
Seong Ho Ha ◽  
Su Yeon Lee ◽  
Young Ok Yoon ◽  
Shae K. Kim
Keyword(s):  
Heat Treatment ◽  
Phase Diagram ◽  
Tensile Property ◽  
Solid Solutions ◽  
Electron Probe ◽  
Solution Heat Treatment ◽  
Ternary Phase ◽  
Ternary Phase Diagram ◽  
X Ray ◽  
Electron Probe Micro Analyzer

Supersaturation behavior of Al solid solutions and its effect on tensile property in Al-7Si-0.4Mg and Al-7Si-0.8Mg alloys during solution heat treatment were investigated in this study. As a result of Mg solubility measurement for Al solid solitions after solution heat treatment for 6 hrs by electron probe micro analyzer (EPMA)-wavelength-dispersive X-ray spectroscopy (WDS), Al-7Si-0.8Mg alloy had the higher Mg solubility, about 0.55 mass%, corresponding to that of Al-Si-Mg ternary phase diagram. From the tensile test, Al-7Si-0.8Mg alloy showed the improved strength and similar elongation to that of Al-7Si-0.4Mg alloy.

scholarly journals The structure of alloys of boron-rich corner of Fe–В–C phase diagram

2020 ◽  
Vol 28 (1) ◽  
pp. 39-42
Author(s):  
O. V. Sukhova
Keyword(s):  
Phase Diagram ◽  
Solid Solutions ◽  
Phase Decomposition ◽  
High Concentration ◽  
X Ray ◽  
Low Concentration ◽  
Eutectic Transformation

The structure and microdurometric characteristics of the Fe–В–С alloys in the range of high concentration of boron (>16.0 wt. % B) and low concentration of carbon (≥ 0.1 wt. % С) were investigated in this work. The methods of quantitative metallographic, X-ray, differential thermal, fluorescent spectral and microdurometric analyses were applied. Carbon was established to dissolve completely in phase constituents of the investigated alloys, forming solid solutions based on iron borides FeB, FeB2, FeB~4 or FeB~19. It was suggested the existence of one eutectic transformation between borides FeB2 and FeB~4 as well as two peritectic transformations between borides FeB and FeB2 or FeB~4 and FeB~19 correspondingly in the studied concentration range. The formation of boride FeB~4 was explained by its stabilization in the presence of carbon in the alloys. After annealing in vacuum at 900 °C for 10 hours with following quenching, the structure became  coarser, but no traces of phase decomposition were revealed in the most alloys. Microhardness of the phases observed in the structure of the investigated alloys increased in the following sequence: FeB→FeB2→FeB~4→FeB~19.

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