Temperature and moisture effects on the failure mode of highly shrinkable raw catalyst supports
| Autor: | Wahbi Jomaa, Alexandre Godin, Fouzia Achchaq, Jean-Rodolphe Puiggali, Stéphanie Bontemps |
|---|---|
| Přispěvatelé: | Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB)-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Moisture Catalyst support 04 agricultural and veterinary sciences 02 engineering and technology 040401 food science Stress (mechanics) [SPI]Engineering Sciences [physics] Cracking rupture stress 0404 agricultural biotechnology 020401 chemical engineering Raw hydrogels Ultimate tensile strength Self-healing hydrogels Brazilian test 0204 chemical engineering Composite material Water content Earth-Surface Processes Shrinkage |
| Zdroj: | Procedia Structural Integrity Procedia Structural Integrity, ESIS-Elsevier, 2016, 2, pp.2283-2290. ⟨10.1016/j.prostr.2016.06.286⟩ |
| ISSN: | 2452-3216 |
| DOI: | 10.1016/j.prostr.2016.06.286 |
| Popis: | International audience; Shrinkage implies generally the development of mechanical stresses and then, the formation of cracks. In this work, four formulations of alumina based hydrogels underwent a standard experimental procedure involving drying and mechanical characterizations. The thermo-hydro-mechanical behaviour of such highly shrinkable hydrogels is analysed by determining their specific surface area, calculated from the desorption isotherms. Brazilian test allowed identifying the cracking stress of the four hydrogel formulations, and the ultimate tensile strength as a function of the water content was obtained for each of them. During the drying experiments inside a convective dryer, two formulations of hydrogels displayed a capacity for self-healing. The results showed a real improvement of the strength property due to the self-repair phenomenon when it occured, proving the importance of taking into account the roles of residual water and of applied temperature conditions in the drying process of the catalyst support production line. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|