Characterization of reticulated ceramic foams with mercury intrusion porosimetry and mercury probe atomic force microscopy
| Autor: | Herbert Giesche, Ralf Ditscherlein, Jana Hubálková, Urs A. Peuker, Christos G. Aneziris, Claudia Voigt, Lisa Ditscherlein |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology 01 natural sciences law.invention chemistry.chemical_compound law 0103 physical sciences Materials Chemistry Ceramic Composite material Porosity Mercury probe Polyurethane 010302 applied physics Ceramic foam Process Chemistry and Technology Porosimetry 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials Mercury (element) chemistry visual_art Ceramics and Composites visual_art.visual_art_medium Extrusion 0210 nano-technology |
| Zdroj: | Ceramics International. 44:22963-22975 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.09.094 |
| Popis: | This study addresses the question of whether mercury intrusion porosimetry is an appropriate measurement devise for the porosity characterization of reticulated ceramic foams which features three kinds of pores: functional pores, material pores and strut cavities remaining after decomposition of the polymeric foam. Reticulated ceramic foam samples made of Al2O3 and Al2O3-C and with functional pore sizes between 10 and 60 ppi (pores per inch) were investigated. The results show that it is feasible to measure the strut cavities and the entryways of the material pores with the help of the mercury intrusion porosimeter. The results for the strut cavity diameter depends strongly on the ppi number of the polyurethane foam used for the preparation of the ceramic foam. For the reticulated Al2O3-C foam samples no extrusion of the mercury is observed. Reasons for the missing extrusion of mercury are discussed. Furthermore, atomic force microscopy (AFM) measurements on Al2O3 and Al2O3-C samples are carried out using a recent AFM method to examine interactions between a mercury droplet and rough surfaces. Factors like approach/retrace speed, reproducibility and applied force are investigated. It is seen that for Al2O3 larger attractive forces are measured than for Al2O3-C. |
| Databáze: | OpenAIRE |
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