| Autor: |
Ballan, Michele, Corradetti, Stefano, Centofante, Lisa, Monetti, Alberto, Manzolaro, Mattia, Meneghetti, Giovanni |
| Předmět: |
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| Zdroj: |
Advanced Materials Science & Technology; 2023, Vol. 5 Issue 1, p1-9, 9p |
| Abstrakt: |
Graphite is often employed for several high temperature research and industrial applications, thanks to its refractoriness and its physical properties such as high thermal conductivity, low thermal expansion and excellent thermal shock resistance. However, its mechanical properties at high temperatures are often unknown and are strongly influenced by its microstructure and composition. This work is focused on a comparative analysis of the compressive strength up to 2000°C of three different commercial graphite grades provided by TOYO TANSO. Two grades of the same kind but different density, IG-43 and IG-45, and a grade with finer grains, TTK-4, were considered. Such materials were selected as their nominal physical and chemical properties are suitable for withstanding the extreme working conditions typical of nuclear applications characterized by high temperature, high vacuum and radiation damage. For the performance of the compressive tests, a custom-built vacuum experimental equipment was used, capable of resistively heating conductive samples at a temperature level up to 2000°C. Specimens with an hourglass shape were manufactured and tested in triplicate at room-temperature, 1000°C and 2000°C for each type of graphite. The dependence of the compressive strength on the graphite grade density and microstructure was highlighted, resulting in higher resistance for denser grades, in accordance with data reported by the supplier. Results collected for the room-temperature tests were consistent with the material datasheets, whereas at 2000°C, an increase of approximately 30%-40% of the compressive strength was displayed compared to its room-temperature value. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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