Research on Obtaining Open-Cell Foam by Molten Metal Infiltration

Abstract:

Abstract Porous metallic materials are the subject of numerous recent studies due to their ability to combine good mechanical and physical properties with low weight. Metal foams are an innovative and challenging class of materials. Due to their unusual physical, mechanical, thermal, and acoustic properties, they have been granted much attention by materials researchers in the last few years and are finding several structural and functional applications in different engineering fields. This foam was produced by a process, which consists mainly in infiltrating molten metal bed of silica gel particles. Later to use hydrofluoric acid (HF) as solvent. In this paper is presented obtaining of metal foam with open-cell. Microstructural analyses on foamed specimens showed uniform microstructure of ligaments and a very regular and well reproducible open-cell morphology. Compositional analyses on foamed specimens showed uniform microstructure of ligaments and the absence of SiO₂ interaction with the metal reproducible open-cell morphology. The use of SiO₂ beads as space holder results in cellular metals with a very homogeneous arrangement of almost spherical cavities. Additionally, because of the high chemical stability of SiO₂, reactions between space holder and molten metal tend to be minimal or inexistent. This methodology is based on cheap commercial consumables and a simple technology, focusing on intermediate-density low-cost foams with interesting cost/benefits ratio. Keywords infiltrating molten metal, silica gel particles, microstructure of ligaments, microstructural analyses, open-cell morphology

• Periodical: Advanced Materials Research (Volume 1036)
• Pages: 46-51
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1036.46
• Online since: October 2014
• Authors: Catalina Nuțescu Duduman, Oana Bălţătescu, Ioan Carcea, Nicanor Cimpoeşu, Mihai Axinte, Cristian Adoroaei
• Keywords: Infiltrating Molten Metal, Microstructural Analyses, Microstructure of Ligaments, Open-Cell Morphology, Silica Gel Particles

References

[1] M.F. Ashby, A. Evans, N.A. Fleck, L. Gibson, J.W. Hutchinson, and H. Wadley, Metal Foams: A Design Guide, Butterworth-Heinemann, Boston, (2000).

DOI: 10.1016/b978-075067219-1/50001-5

[2] J. Banhart, Manufacture Characterization and Application of Cellular Metals and Metal Foams, Prog. Mater. Sci., 46(6), (2001), p.559–632.

DOI: 10.1016/s0079-6425(00)00002-5

[3] H.N.G. Wadley, Cellular Metals Manufacturing, Adv. Eng. Mater., 4(12), (2002) p.726–733.

[4] J.F. Despois, A. Marmottant, L. Salvo, and A. Mortensen, Spherical Pore Replicated Microcellular Aluminium: Processing and Influence on Properties, Mater. Sci. Eng. A, 462(1–2), (2007), p.68–75.

DOI: 10.1016/j.msea.2007.02.002

[5] E.M. Castrodeza and C. Mapelli, Italian Industrial Patent Process MO 2008 A 166.

[6] E. M. Castrodeza, Carlo Mapelli Processing of brass open-cell foam by silica-gel beads replication Journal of Materials Processing Technology 209, (2009), p.4958–4962.

DOI: 10.1016/j.jmatprotec.2008.12.009

[7] C. Mapelli, D. Mombelli, A. Gruttadauria, S. Barella, E.M. Castrodeza, Performance of stainless steel foams produced by infiltration casting techniques Journal of Materials Processing Technology 213 (2013), p.1846– 1854.

DOI: 10.1016/j.jmatprotec.2013.05.010

[8] www. copper. org(10/11/2013).

[9] E.M. Castrodeza, C. Mapelli, M. Vedani, S. Arnaboldi, P. Bassani, and A TuissiProcessing of Shape Memory CuZnAl Open-cell Foam by Molten Metal Infiltration Journal of Materials Engineering and Performance Volume 18(5–6), (2009), pp.484-489.

DOI: 10.1007/s11665-009-9398-6

[10] S.A. Lermontov and A.N. Malkova, A New Method for Dissolution of Silica Gel in a Penta fluoro propionyl Fluoride tertiary Amine System, Russian Chem. Bull., 56(3), (2007), p.435–437.

DOI: 10.1007/s11172-007-0069-1

[11] G. Spierings, Wet Chemical Etching of Silicate Glasses in Hydrofluoric Acid Based Solutions, J. Mater. Sci., 28(23), (1993), p.6261–6273.

DOI: 10.1007/bf01352182