2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 8: Composite & Ceramic, Quasi-crystals and Nanomaterials
| Editors: | Kongoli F, Pech-Canul M, Kalemtas A, Werheit H |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 300 pages |
| ISBN: | 978-1-987820-31-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Thermodynamic Analysis of the Ti-B-O-C System and Preparation of the Mixture of Titanium Boride and Titanium Carbide Powders
Ketevan Ukleba1; Zurab Tsikaridze2; Jondo Bagdavadze2; Domenti Gabunia2;1, Tbilisi, Georgia; 2FERDINAND TAVADZE INSTITUTE OF METALLURGY AND MATERIALS SCIENCE, Tbilisi, Georgia;
Type of Paper: Regular
Id Paper: 307
Topic: 18
Abstract:
At the contemporary stage of the development of industry, there are widely used nanostructural composite materials. In particular, the materials containing metal carbides and metal borides should be noted. That is why the technologies for fabricating these materials by chemical methods, e.g. by the reduction processes require provision of large-scale theoretical and experimental studies.
Recent years have been marked by an intense development of studies of chemical and phase equilibria in multicomponent and multiphase systems by using the methods of computer simulation. This approach applied to the processes of fabricating composite and nanostructural materials is of great interest.
It should be noted that the method of Full Thermodynamic Analysis (FTA) used in the present work gives an opportunity to consider not only the equilibrium conditions occurring in the system processes, but also the mechanisms of interaction of components in complex systems and to regulate the composition of final product as well.
The aim of the present work was to provide thermodynamic analysis of the titanium carbide and titanium boride process of formation and on the basis of this analysis to carry out experiments for fabricating nanostructural composite materials.
The innovation of the work was the study of physical and chemical basics of high-temperature processes for producing carbides and borides of the specified systems, the study being a precondition to minimizing the number of experiments.
PTA of carbothermal reduction of the oxides of TiO2 and B2O3 of different composition was performed at high temperatures in vacuum resulting in the formation of titanium carbides and borides:
TiO2 - x mass %; B2O3 - y mass %; C - [100-(x+y) mass %]
There were not found any data on PTA of the considered system in the available literature. Therefore PTA performance on the specified system was of a great interest. Estimations were carried out on the COMPUTER applying the ASTRA 4 program in the range of temperatures 500-2000 K with the step of 500 in vacuum. The obtained results were presented in the form of charts (temperature dependent components).
The results of estimations were used in the provided experiments and pilot samples of composite materials were prepared.
Keywords:
Aluminum; Carbon; Ceramic; Composites; Materials; Nanocomposites; Nanotechnology; Processing; Technology;References:
[1] Vatolin, N. A., Moiseev, G. K., Trusov, B. G., Thermodynamic modeling in high-temperature inorganic systems. M. Metallurgia, 1994, 352 pp.[2] Gvelesiani, G.G., Bagdavadze, D.I., Calculation methods of definition of thermodynamic functions of inorganic substances and their application in the full thermodynamic analysis of metallurgical processes. Edition “Universal”, 2006,127 p.
[3] Voronin, G. F., Estimations of phase and chemical equilibrium in complex systems // in book: Physical chemistry. Contemporary Problems, M. 1984, p.112-143