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Fabrication and characterization of aluminum nitride sponges using a mixture of two porous formation methods

Published online by Cambridge University Press:  04 November 2019

Rodrigo Alan Martínez Molina ,
José Egberto Bedolla Becerril ,
Ena Athenea Aguilar Reyes ,
Raul Alejando Pulido Aguilar  and
Carlos Arreola Fernandez
Rodrigo Alan Martínez Molina*
Affiliation:
Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigación en Metalurgia y Materiales, Mexico.
José Egberto Bedolla Becerril
Affiliation:
Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigación en Metalurgia y Materiales, Mexico.
Ena Athenea Aguilar Reyes
Affiliation:
Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigación en Metalurgia y Materiales, Mexico.
Raul Alejando Pulido Aguilar
Affiliation:
Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigación en Metalurgia y Materiales, Mexico.
Carlos Arreola Fernandez
Affiliation:
Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigación en Metalurgia y Materiales, Mexico.
*
*(Email: [email protected])
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Abstract

A method for the fabrication of interconnected ceramic sponges was used in the present work, designed by using a combination of two different, aqueous gel casting and sacrificial template, using aluminum nitride powder (99.97%) with a mean size of 2.4 micrometers. Two types of sponges were made by using two different monomers, acrylamide and methacrylamide, the resultants sponges have 60% of porosity after being sintered and pyrolyzed at temperature of 1673 K using an inert atmosphere of argon for 1 h. The hydrolysis evolution of this ceramic powder during the gelcasting process was studied by measuring the pH during the stirring time, the microstructure changes during the time of exposure were observed in a SEM. XRD were made to study the present phases after the gel was eliminated by thermal treatment at 873 K using an oxidizing atmosphere, observing a formation of up to 4 %wt. of cubic alumina phase which was made after the hydrolysis products. Infrared spectroscopy was used to study the changes in the ceramic powder.

Keywords

ceramicfoampowder processing
Type
Articles
Information
MRS Advances , Volume 4 , Issue 54: International Materials Research Congress XXVIII , 2019 , pp. 2977 - 2987
Copyright
Copyright © Materials Research Society 2019 

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