USE OF THE FRACTAL DIMENSION FOR POROSITY MODIFICATION IN ALUMINUM FOAMS MANUFACTURED USING SPACE HOLDER PARTICLES
Por:
Reyes, Christian C., Bejar, Luis, Perez, Luis, Aguilar, Claudio, Carranza, Juan C., Carranza, Luis E., Alfonso, Ismeli
Publicada:
1 ene 2021
Resumen:
The effect of space holder particles (SHP) fractal distribution on the
porosity of aluminum foams manufactured by infiltration is studied in
the present work. Physical models were used to estimate aluminum foam
porosity, simulating SHP distribution for bimodal mixtures with
different particle sizes and relative quantities. Results of these
models were compared with mathematical models and the results obtained
for experimental aluminum foams manufactured using a 332 Al-alloy base
material and NaCl grains as SHP. Experimental foam structural
characterization was carried out using image analysis to obtain
porosity, density, wall thickness and fractal dimension, while
mechanical characterization focused on the compressive Young modulus.
Results show that it was possible to manufacture foams with different
fractal porosities and a wide variety of unit cells, reaching a maximum
of similar to 68%. It was also found that pore wall thicknesses
significantly decreased with the increase in the fine particles
fraction. Besides, all the models presented a peak with a maximum
porosity, whose values increased and shifted to low fine particles
fraction with the increase in the sizes ratio. This behavior was also
observed for the experimental foams with low particle size ratio.
Nevertheless, for higher size ratios porosity showed an irregular
behavior attributed to the mixing process.
Filiaciones:
Reyes, Christian C.:
Department Of Mechanical Engineering, Universidad Michoacana De San Nicolás De Hidalgo, Morelia, Mexico
Bejar, Luis:
Department Of Mechanical Engineering, Universidad Michoacana De San Nicolás De Hidalgo, Morelia, Mexico
Perez, Luis:
Department of Mechanical Engineering, Universidad Técnica Federico Santa María, Valparaíso, Chile
Aguilar, Claudio:
Department of Metallurgy and Materials, Universidad Técnica Federico Santa María, Valparaiso, Chile
Carranza, Juan C.:
nstituto De Investigaciones En Materiales, Unidad Morelia Universidad Nacional Autonoma De México, Morelia, Mexico
Carranza, Luis E.:
Department Of Mechanical Engineering, Universidad Michoacana De San Nicolás De Hidalgo, Morelia, Mexico
Alfonso, Ismeli:
Instituto de Investigaciones en Materiales, Unidad Morelia Universidad Nacional Autonoma de México, Morelia, Mexico
gold, All Open Access; Gold
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