Author(s): Matos, Maria José ; Dias, Susana ; Oliveira, Fernando Almeida Costa
Date: 2007
Persistent ID: http://hdl.handle.net/10400.9/945
Origin: Repositório do LNEG
Subject(s): Replication process; Cellular ceramics; Thermal properties; Cordierite; Substrates; Replication process; Replication process; Cellular ceramics; Cellular ceramics; Thermal properties; Thermal properties; Cordierite; Cordierite; Substrates; Substrates
The goal of this work was to clarify the macrostructural changes that take place upon sintering of open cell cordierite based foams. A methodology, based on optical image analysis, was developed to assess the structure of open-cell foams, which allowed evaluating the macrostructure of both cordierite based foams obtained by the replication process and their polymeric templates. The parameters used to describe the structures were the size of the cell and the window, the window shape factor, the strut thickness and the volume fraction of the material. The experimental evidence gathered opened the way to understand the physical/chemical transformations involved in the polymer burnout and the ceramic sintering processes, as well as their influence on the ceramic final structure. The observed trends provide guidance for tailoring ‘replicated’ cordierite based foams, in view of the required application.
