Next Article in Journal
Synthesis and Characterization of NanocrystallineMg-7.4%Al Powders Produced by Mechanical Alloying
Previous Article in Journal
Large Compressive Plasticity in a La-Based Glass-Crystal Composite
Previous Article in Special Issue
Characterization of Steel Foams for Structural Components
Article Menu

Export Article

Open AccessArticle
Metals 2013, 3(1), 49-57;

Permeability of Aluminium Foams Produced by Replication Casting

Department of Foundry Engineering, Ural Federal University, Ekaterinburg 620002, Russia
Composite Materials Ltd., Ekaterinburg 620000, Russia
Author to whom correspondence should be addressed.
Received: 18 September 2012 / Revised: 6 December 2012 / Accepted: 20 December 2012 / Published: 28 December 2012
PDF [783 KB, uploaded 28 December 2012]


The replication casting process is used for manufacturing open-pore aluminum foams with advanced performances, such as stability and repeatability of foam structure with porosity over 60%. A simple foam structure model based on the interaction between sodium chloride solid particles poorly wetted by melted aluminum, which leads to the formation of air pockets (or “air collars”), is proposed for the permeability of porous material. The equation for the minimum pore radius of replicated aluminum foam is derived. According to the proposed model, the main assumption of the permeability model consists in a concentration of flow resistance in a circular aperture of radius rmin. The permeability of aluminum open-pore foams is measured using transformer oil as the fluid, changing the fractions of initial sodium chloride. Measured values of minimum pore size are close to theoretically predicted ones regardless of the particle shape. The expression for the permeability of replicated aluminum foam derived on the basis of the “bottleneck” model of porous media agrees well with the experimental data. The obtained data can be applied for commercial filter cells and pneumatic silencers. View Full-Text
Keywords: aluminum foam; porous casting; replication process; permeability of aluminum open-pore foams aluminum foam; porous casting; replication process; permeability of aluminum open-pore foams

Figure 1

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Furman, E.L.; Finkelstein, A.B.; Cherny, M.L. Permeability of Aluminium Foams Produced by Replication Casting. Metals 2013, 3, 49-57.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top