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MECHANICAL PROPERTIES OF COPPER FOAM REINFORCED WITH ALUMINA PARTICLES

  • : Claudio Aguilar1, Danny Guzman2, Paula Rojas3, Sheila Lascano1, Luis Perez1, Christopher Salvo1, Ismeli Lopez4
  • : 1Universidad Técnica Federico Santa María, 2Universidad de Atacama, 3Pontificia Universidad Católica de Valparaíso, 4Universidad Nacional Autónoma de México
  • : PDF Download
  • : 2014

Abstract

This work has been focus about the influence of Al2O3 (alumina) particles on copper foam and their mechanical properties. The foams were produced by means of space holder method. The sodium chloride (NaCl), ammonium hydrogen carbonate and potassium carbonate have been tested as space holder materials. The green compacts have been prepared by mixing the blend of copper, space holder and alumina powders by applying 200 MPa pressure. The foams are obtained with NaCl as space holder (50 and 60% v/v). The synthesis of copper foam has been achieved in two different temperatures and times, i) 790°C for 2h and ii) 850°C for 4 h. Two different sized alumina particles (1 and 0.01 µm) have been used in this work with different volume fraction of 2, 4 and 6%v/v. The results of structural characterization and mechanical properties are obtained through optical, scanning electron microscopy (SEM) and compression test analyses. The yield strength in increases from 3MPa to 6 MPa with the volume fraction of alumina particles increased. The elastic modulus values are decreases when compared with pure copper due the porosity.

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