Modelling the physical properties of glasslike carbon foams

5th International Conference New Achievements in Materials and Environmental Science

材料科学;生态环境科学

Letellier, M.^1 ; Macutkevic, J.^2 ; Bychanok, D.^3 ; Kuzhir, P.^3 ; Delgado-Sanchez, C.^1 ; Naguib, H.^4 ; Mosanenzadeh, S. Ghaffari^4 ; Fierro, V.^1 ; Celzard, A.^1

Institut Jean Lamour, UMR Université de Lorraine, CNRS no7198, ENSTIB, 27 rue Philippe Séguin, CS 60036, Épinal Cedex

88026, France^1

Department of Radiophysics, Vilnius University, Sauletekio 9, Vilnius

10022, Lithuania^2

Research Institute for Nuclear Problems BSU, 11 Bobruiskaya Str., Minsk

220030, Belarus^3

Department of Materials Science and Engineering, University of Toronto, 5 King's College Road, Toronto

ON

M5S 3G8, Canada^4

关键词: Bulk density;    Cell size;    Electromagnetic measurement;    Glass-like carbon;    Optimisations;    Porous structures;    Rigid foams;    Vitreous carbon;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/879/1/012014/pdf
DOI  :  10.1088/1742-6596/879/1/012014

来源: IOP

【 摘 要 】

In this work, model alveolar materials - carbon cellular and/or carbon reticulated foams - were produced in order to study and to model their physical properties. It was shown that very different morphologies could be obtained whereas the constituting vitreous carbon from which they were made remained exactly the same. Doing so, the physical properties of these foams were expected to depend neither on the composition nor on the carbonaceous texture but only on the porous structure, which could be tuned for the first time for having a constant pore size in a range of porosities, or a range of pore sizes at fixed porosity. The physical properties were then investigated through mechanical, acoustic, thermal and electromagnetic measurements. The results demonstrate the roles played by bulk density and cell size on all physical properties. Whereas some of the latter strongly depend on porosity and/or pore size, others are independent of pore size. It is expected that these results apply to many other kinds of rigid foams used in a broad range of different applications. The present results therefore open the route to their optimisation.