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Materials 2016, 9(4), 254; doi:10.3390/ma9040254

Fabrication and Compressive Properties of Low to Medium Porosity Closed-Cell Porous Aluminum Using PMMA Space Holder Technique

1
Centre of Advanced Manufacturing and Materials Processing (AMMP), Faculty of Engineering, University Malaya, Kuala Lumpur 50603, Malaysia
2
Department of Mechanical Engineering, Faculty of Engineering, Kuala Lumpur 50603, Malaysia
3
Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
4
Manufacturing and Materials Department (MME), Kulliyah of Engineering, International Islamic University Malaysia, P.O. Box 10, Kuala Lumpur 50728, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Rafael Luque
Received: 11 February 2016 / Revised: 11 March 2016 / Accepted: 14 March 2016 / Published: 30 March 2016
(This article belongs to the Section Porous Materials)
View Full-Text   |   Download PDF [2949 KB, uploaded 30 March 2016]   |  

Abstract

In recent years, closed-cell porous Aluminum (Al) has drawn increasing attention, particularly in the applications requiring reduced weight and energy absorption capability such as in the automotive and aerospace industries. In the present work, porous Al with closed-cell structure was successfully fabricated by powder metallurgy technique using PMMA as a space holder. The effects of the amount of PMMA powder on the porosity, density, microstructure and compressive behaviors of the porous specimens were systematically evaluated. The results showed that closed-cell porous Al having different porosities (12%–32%) and densities (1.6478 g/cm3, 1.5125 g/cm3 and 1.305 g/cm3) could be produced by varying the amount of PMMA (20–30 wt %). Meanwhile, the compressive behavior results demonstrated that the plateau stress decreased and the energy absorption capacity increased with increasing amount of PMMA. However, the maximum energy absorption capacity was achieved in the closed-cell porous Al with the addition of 25 wt % PMMA. Therefore, fabrication of closed-cell porous Al using 25 wt % PMMA is considered as the optimal condition in the present study since the resultant closed-cell porous Al possessed good combinations of porosity, density and plateau stress, as well as energy absorption capacity. View Full-Text
Keywords: porous Al; PMMA; space holder technique; closed pores; compressive behavior porous Al; PMMA; space holder technique; closed pores; compressive behavior
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jamal, N.A.; Tan, A.W.; Yusof, F.; Katsuyoshi, K.; Hisashi, I.; Singh, S.; Anuar, H. Fabrication and Compressive Properties of Low to Medium Porosity Closed-Cell Porous Aluminum Using PMMA Space Holder Technique. Materials 2016, 9, 254.

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