ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The structure and morphological aspects of highly porous (higher than 90%) cordierite(Mg2Al4Si5O18) foams, prepared by a direct foaming method, have been evaluated by ScanningElectron Microscopy analysis. The resulting ceramic foams consisted of a three-dimensional arrayof struts forming a well-defined open-cell structure. This type of structure seems very attractive forcatalyst support purposes. Attempts have been made in order to control the pore structure since itdirectly affects the physical properties, namely the mechanical strength. In this respect, the use of adip coating method to improve the strength of the resulting foams was found to be effective inreducing defects (e.g. pores, flaws) in the struts. Based on image analysis, estimated mean cell sizeswere about 550 µm whereas strut thicknesses varied in the range of 60-70 µm. The compressivestrength of the developed foams increased by one order of magnitude (0.1 to 1 MPa) by increasingthe relative density from 0.06 to 0.18
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.587-588.123.pdf
Permalink