Influence of Thermal Treatment on Phase Formation Processes in Amorphous Alloys

2018 ◽  
pp. 341-352
Author(s):  
Volodymir Lysov ◽  
Tatiana Tsaregradskaya ◽  
Oleg Turkov ◽  
Galina Saenko
Keyword(s):  
Thermal Treatment ◽  
Phase Formation ◽  
Amorphous Alloys ◽  
Formation Processes

scholarly journals The Theoretical Analysis of Phase-Formation Processes in Amorphous Alloys of Fe—Zr System

2016 ◽  
Vol 38 (9) ◽  
pp. 1233-1247 ◽  
Author(s):  
I. V. Plyushchay ◽  
◽  
T. L. Tsaregrads’ka ◽  
O. O. Kalenyk ◽  
O. I. Plyushchay ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Phase Formation ◽  
Amorphous Alloys ◽  
Formation Processes

Features of Phase Formation Processes in Amorphous Alloys of Fe–Zr System

2020 ◽  
pp. 409-423
Author(s):  
Tatiana L. Tsaregradskaya ◽  
Inna V. Plyushchay ◽  
Olexandr O. Kalenyk ◽  
Olexandr I. Plyushchay ◽  
Galina V. Saenko
Keyword(s):  
Phase Formation ◽  
Amorphous Alloys ◽  
Formation Processes

Amorphous Phase Formation During Ion Mixing of Ti/Si Bilayers at Elevated Temperature

1988 ◽  
Vol 100 ◽  
Author(s):  
K. Maex ◽  
R. F. De Keersmaecker ◽  
M. Van rossum ◽  
W. F. Van Der Weg
Keyword(s):  
Elevated Temperature ◽  
Thermal Treatment ◽  
Diffusion Couple ◽  
Amorphous Phase ◽  
Phase Formation ◽  
Multilayer Structure ◽  
Elevated Temperatures ◽  
Binary Diffusion ◽  
Amorphous Phase Formation

ABSTRACTThe amorphous phaseformation in Ti-Si bilayers upon ion mixing at elevated temperatures and in Ti-Si multilayers upon thermal treatment was studied. In the case of ion mixing with 5×1015 cm−2 Xe atoms at temperatures around 240°C a 100nm thick amorphous Ti-Si alloy is formed with a very homogeneous Ti:Si=3 :4 composition. Thermal treatment of the Ti-Si multilayer structure at similar temperatures also yields amorphous silicide layers. The results are interpreted according to the evolution in a planar binary diffusion couple, where the Si and Ti concentrations in the reacted layer are dictated by thermodynamic and kinetic arguments.

Aspects of the phase-formation processes in highly dispersed BaTiO3-based materials

1991 ◽  
Vol 30 (12) ◽  
pp. 1005-1006
Author(s):  
V. I. Lapshin ◽  
E. L. Fokina ◽  
I. A. Kozlovskaya
Keyword(s):  
Phase Formation ◽  
Formation Processes ◽  
Highly Dispersed

Structural Effects on Perovskite Phase Formation for PZT Powders Obtained by Polymeric Precursor Method

2018 ◽  
Vol 930 ◽  
pp. 101-106
Author(s):  
Margarete Soares da Silva ◽  
Lucas L. da Silva ◽  
Eliane F. de Souza ◽  
Talita Cuenca Pina Moreira Ramos ◽  
Igor Silva de Sá ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Thermal Treatment ◽  
Phase Formation ◽  
Lead Zirconate Titanate ◽  
Perovskite Phase ◽  
Synthesis Methods ◽  
Polymeric Precursor Method ◽  
Polymeric Precursor ◽  
Structural Effects ◽  
Precursor Method

Many synthesis methods are available to obtain a set of specific characteristics for lead zirconate titanate (PZT) piezoelectric ceramic powders. In this work, we have successfully prepared PZT powder samples through the Polymeric Precursor Method with x = 0.6, according the general formula Pb (ZrxTi1-x)O3. The powders were thermally treated from 380 to 550 oC and characterized by Raman spectroscopy and X-ray diffraction (DRX) in order to evaluate the effects of thermal treatment on the phase formation and the crystallization processes. The results obtained by Raman spectroscopy were compared to refined crystal data obtained by Rietveld method, leading to coherent conclusions about the structural effects occurring along the temperature of calcination. It was possible to characterize the tetragonal perovskite phase as predominant phase occurs only after 500 oC, but its crystallinity is already determined by synthesis method. Thus, no ordering process is verified for perovskite as a function of the temperature increasing during thermal treatment, in spite of the continuous pyrochlore-to-perovskite phase transition. The pyrochlore secondary phase starts to vanish before its proper crystallization process, changing the tetragonality of previously formed perovskite phase.

scholarly journals Optimizing phase formation of BiFeO3 and Mn-doped BiFeO3 nanoceramics via thermal treatment using citrate precursor method

2020 ◽  
Vol 2 (12) ◽  
Author(s):  
Waseem Ahmad Wani ◽  
Souvik Kundu ◽  
Kannan Ramaswamy ◽  
B. Harihara Venkataraman
Keyword(s):  
Thermal Treatment ◽  
Phase Formation ◽  
Precursor Method ◽  
Mn Doped ◽  
Citrate Precursor ◽  
Citrate Precursor Method

scholarly journals Kinetic Investigations of Phaseformation Processes in the BaO-Al2O3-Fe2O3 System

2010 ◽  
Vol 4 (2) ◽  
pp. 91-93
Author(s):  
Nikolay Iloukha ◽  
◽  
Zoya Barsova ◽  
Irina Cwhanovskaya ◽  
Valentina Timofeeva ◽  
...  
Keyword(s):  
Activation Energy ◽  
Phase Formation ◽  
Rate Constant ◽  
Reaction Temperature ◽  
Reaction Rate ◽  
Degree Of Conversion ◽  
Formation Processes ◽  
Kinetic Investigations

The kinetic investigations of phase formation processes in the mixture which contains BaO, Al2O3, Fe2O3 were carried out. The degree of conversion and the activation energy were calculated, the dependence of the reaction rate and the rate constant on reaction temperature was determined.

scholarly journals Study of Phase Formation Processes in Li2ZrO3 Ceramics Obtained by Mechanochemical Synthesis

Crystals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 21
Author(s):  
Maxim V. Zdorovets ◽  
Artem L. Kozlovskiy ◽  
Baurzhan Abyshev ◽  
Talgat A. Yensepbayev ◽  
Rizahan U. Uzbekgaliyev ◽  
...  
Keyword(s):  
Phase Formation ◽  
Structural Changes ◽  
Annealing Temperature ◽  
Solid Phase ◽  
Image Data ◽  
Formation Processes ◽  
Ceramic Structure ◽  
Current Voltage ◽  
Average Grain Size ◽  
Temperature Dependences

The article is dedicated to the study of the phase formation processes in Li2ZrO3 ceramics obtained by the method of solid phase synthesis. Interest in these types of ceramics is due to their great potential for use as blanket materials in thermonuclear reactors, as well as being one of the candidates for tritium breeder materials. Analysis of the morphological features of the synthesized ceramics depending on the annealing temperature showed that the average grain size is 90–110 nm; meanwhile the degree of homogeneity is more than 90% according to electronic image data processing results. The temperature dependences of changes in the structural and conducting characteristics, as well as the phase transformation dynamics, have been established. It has been determined that a change in the phase composition by displacing the impurity LiO and ZrO2 phases results in the compaction of ceramics, as well as a decrease in their porosity. These structural changes are due to the displacement of LiO and ZrO2 impurity phases from the ceramic structure and their transformation into the Li2ZrO3 phase. During research, the following phase transformations that directly depend on the annealing temperature were established: LiO/ZrO2/Li2ZrO3 → LiO/Li2ZrO3 → Li2ZrO3. During analysis of the obtained current-voltage characteristics, depending on the annealing temperature, it was discovered that the formation of the Li2ZrO3 ordered phase in the structure results in a rise in resistance by three orders of magnitude, which indicates the dielectric nature of the ceramics.

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