Please use this identifier to cite or link to this item:
https://essuir.sumdu.edu.ua/handle/123456789/97010
Or use following links to share this resource in social networks:
Tweet
Recommend this item
Title | Controlled synthesis of TiB2-TiC composite: Substantiation of the homogenizing Joule thermostatting efficiency and improvement of SHS-compaction technology in a vacuum |
Authors |
Jandieri, G.
Sakhvadze, D. |
ORCID | |
Keywords |
ceramic-matrix composite Joule heating Seebeck effect microstructure homogenization |
Type | Article |
Date of Issue | 2024 |
URI | https://essuir.sumdu.edu.ua/handle/123456789/97010 |
Publisher | Sumy State University |
License | Creative Commons Attribution - NonCommercial 4.0 International |
Citation | Jandieri G., Sakhvadze D. (2024). Controlled synthesis of TiB2-TiC composite: Substantiation of the homogenizing Joule thermostatting efficiency and improvement of SHS-compaction technology in a vacuum. Journal of Engineering Sciences (Ukraine), Vol. 11(2), pp. C13–C28. https://doi.org/10.21272/jes.2024.11(2).c2 |
Abstract |
This research aims to improve and substantiate the efficiency of homogenization heat-stabilizing Joule
heating on ceramic-matrix composites of TiB2-TiC system with a 2:1 component ratio during its synthesis. For this
purpose, an improved technological approach is proposed, which is based on the known method of SHS-compacting
but differs by the possibility of controlled Joule influence on the synthesis products, which is achieved by the use of a
special electrothermal vacuum press-mold functioning according to a particular control algorithm. The task of
controlled Joule heating is a compensation of the temperature gradient formed in the synthesized workpiece, which is
solved by passing in it a direct current directed in line with the vector of propagation of the combustion wave. An
indicator of assessment of the degree of compensation of the noted temperature gradient is the Seebeck effect, excited
between the upper and lower surface of the SHS workpiece, which should be brought to zero in the process of Joule
thermostatting. It was experimentally revealed that compensation of the noted temperature gradient with heat released
predominantly by electrically conductive and Joule-heated TiC grains leads to their softening, which contributes to
more uniform compaction of the workpiece due to diffusion coalescence of these grains around prism-shaped hard TiB2
crystals. Such consolidation leads to a significant increase in the quality of structural packaging and a reduction in the
number and volume of micropores, as a result of which the performance properties of the composite improve on average
by 10–15 %. |
Appears in Collections: |
Journal of Engineering Sciences / Журнал інженерних наук |
Views
Unknown Country
1
Downloads
Files
File | Size | Format | Downloads |
---|---|---|---|
Jandieri_jes_2_2024.pdf | 1.45 MB | Adobe PDF | 0 |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.