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Synthesis and Properties of Pulsed Electric Current Sintered AlN/Cu Composites

Published online by Cambridge University Press:  02 January 2019

Carlos A. León-Patiño Open the ORCID record for Carlos A. León-Patiño [Opens in a new window] ,
Deisy Ramirez-Vinasco ,
Ena A. Aguilar-Reyes  and
Makoto Nanko
Carlos A. León-Patiño*
Affiliation:
Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo. Edificio U, Ciudad Universitaria, C.P.58130, Morelia, Mexico.
Deisy Ramirez-Vinasco
Affiliation:
Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo. Edificio U, Ciudad Universitaria, C.P.58130, Morelia, Mexico.
Ena A. Aguilar-Reyes
Affiliation:
Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo. Edificio U, Ciudad Universitaria, C.P.58130, Morelia, Mexico.
Makoto Nanko
Affiliation:
Department of Mechanical Engineering, Nagaoka University of Technology, Nagaoka, Niigata940-2188, Japan.
*
*(Email: caleon@umich.mx)
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Abstract

This research shows the development of alternative Cu-based materials for applications where enhanced thermal properties are desired. Cu/AlN composites were fabricated from mixtures of pure Cu and copper plated AlN-Cu composite powders. The ceramic phase was added in amounts of 10, 20 and 30 vol.% and the mixtures sintered by pulsed electric current sintering process (PECS). The results showed that the AlN particles are homogeneously distributed in the copper matrix and that the true contacts between hard particles are reduced because of the deposited copper on their surfaces, improving the connectivity of the matrix phase and bonding at the metal-ceramic interface. The relative density of the Cu/AlN composites was major than 97% in all cases. Thermal conductivity of the composites was high and decreased with the ceramic content from 359 to 194 W/mK, for 10 and 30% AlN, respectively. The coefficient of thermal expansion followed a lineal behavior with temperature and is also reduced with the ceramic content.

Keywords

compositepowder metallurgythermal conductivityCunitride
Type
Articles
Information
MRS Advances , Volume 3 , Issue 62: International Materials Research Congress XXVII , 2018 , pp. 3611 - 3619
Copyright
Copyright © Materials Research Society 2018 

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