An Innovative Method to Produce Metal Foam Using Cold Gas Dynamic Spray Process Assisted by Fluidized Bed Mixing of Precursors

Abstract:

Metallic foams are known for their interesting physical and mechanical properties such as high stiffness, very low specific weight, high compression strength, unusual acoustic and thermal properties and good energy absorption characteristics. These materials are currently manufactured by means of several different processes. The limit of these conventional technologies is the impossibility to produce foams with complex geometry.This paper deals with the study of an innovative method to produce complex shaped precursors for aluminum foams through cold gas dynamic spray deposition process (CGDS). Aluminum alloy (Al-Si) fine powders were previously mixed with the blowing agent (titanium-hydride, TiH2). The mixing process was carried out by means of sound-assisted fluidized bed apparatus that allows to obtain an homogeneous mixture of the two elements. The mixed particles were then sprayed by means of the CGDS process on a stainless steel sheet that simulates the real component to be reinforced with the foam. Subsequently the obtained precursor was heated up in a furnace The produced metal foam was characterized using optical and electron microscopy in order to study the cell morphology and distribution.The obtained results showed the effectiveness of this method to produce aluminum foams with complex shape.

• Periodical: Key Engineering Materials (Volumes 651-653)
• Pages: 913-918
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.651-653.913
• Online since: July 2015
• Authors: Felice Rubino*, Paola Ammendola, Antonello Astarita, Federica Raganati, Antonino Squillace, Antonio Viscusi, Riccardo Chirone, Luigi Carrino
• Keywords: Aluminium, Cold Spray Deposition, Metal Foam, Precursor Fabrication

References

[1] J. Banhart, Manufacture, Characterization and Applications of Cellular Metals and Metal Foams, Progress in Materials Science, 46 6 (2001) 559-632.

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

[2] P. Carlone, G.S. Palazzo, Characterization of TIG and FSW weldings in cast ZE41A magnesium alloy, J Mater Process Tech 215 (2015), 87-94.

DOI: 10.1016/j.jmatprotec.2014.07.026

[3] P. Carlone, G.S. Palazzo, Influence of process parameters on microstructure and mechanical properties in AA2024-T3 friction stir welding. Metallography Microstruct Anal 2 (2013), 213–222.

DOI: 10.1007/s13632-013-0078-4

[4] L.P. Lefebvre, J. Banhart, Porous Metals and Metallic Foams: Current Status and Recent Developments, Advanced Engineering Materials 9 10 (2008).

DOI: 10.1002/adem.200800241

[5] J. Banhart, Manufacturing Routes for Metallic Foams, JOM 0012 (2000) 22-27.

DOI: 10.1007/s11837-000-0062-8

[6] J. Banhart, German Patent, 100 15 (2000).

[7] J. Banhart, J. Baumeister, Deformation Characteristic of Metal Foam, J Mater Sci. 33 (1998) 1431-40.

[8] B. Matijasevic, J. Banhart, S. Fiechter, O. Görke, N. Wanderka, Modification of Titanium Hydride for improved aluminum foam manufacture, Acta Mater., 54 1887-(1900).

DOI: 10.1016/j.actamat.2005.12.012

[9] B. Matijasevic, J. Banhart, Improvement of aluminum foam technology by tailoring of blowing agent, Scr. Mater., 54 (2006) 503-8.

DOI: 10.1016/j.scriptamat.2005.10.045

[10] A. Papyrin, Cold Spray Technology, Adv. Mater. Process. 159 (2001) 49-51.

[11] J. Karthikeyan, Cold Spray Technology, Adv. Mater. Process. 163 (2005) 33-35.

[12] E. Irissou, J. G. Legoux, A. N. Ryabinin, B. Jodoin and C. Moreau, Review on Cold Spray Process and Technology: Part I—Intellectual Property, Journal of Thermal Spray Technology, Volume 17(4) December 2008, 495-516.

DOI: 10.1007/s11666-008-9203-3

[13] D. Wei, R. Dave, R. Pfeffer, Mixing and characterization of nanosized powders: an assessment of different techniques, Journal of Nanoparticle Research 4 (2002) 21–41.

[14] P. Ammendola, R. Chirone, F. Raganati, Fluidization of binary mixtures of nanoparticles under the effect of acoustic fields, Advanced Powder Technology 22(2) (2011) 174–183.

DOI: 10.1016/j.apt.2010.10.002

[15] P. Ammendola, R. Chirone, F. Raganati, Effect of mixture composition, nanoparticle density and sound intensity on mixing quality of nanopowders, Chemical Engineering and Processing: Process Intensification 50(8) (2011) 885–891.

DOI: 10.1016/j.cep.2011.05.001

[16] K.J. Hodder, J.A. Nychka, A.G. McDonald, Comparison of 10 μm and 20 nm Al-Al2O3 Metal Matrix Composite Coatings Fabricated by Low-Pressure Cold Gas Dynamic Spraying, Journal of Thermal Spray Technology 23(5) (2014) 839-848.

DOI: 10.1007/s11666-014-0094-1

[17] J. Lázaro, E. Solórzano, J. A. de Saja, M. A. Rodríguez-Pérez, Early anisotropic expansion of aluminum foam precursors, J Mater Sci 48 (2013) 5036–5046.

DOI: 10.1007/s10853-013-7291-z

[18] J. Lázaro, E. Laguna-Gutiérrez, E. Solórzano, M. A. Rodríguez-Pérez, Effect of Microstructural Anisotropy of PM Precursors on the Characteristic Expansion of Aluminum Foams, Metallurgical and Materials Transactions B volume 44B (2013) 984-991.

DOI: 10.1007/s11663-013-9852-6

[19] F. Garcia-Moreno, E. Solórzano, J. Banhart, Kinects of coalescence in liquid aluminum foams, Soft Matter 7 (2011) 9216-9223.

DOI: 10.1039/c1sm05831b

[20] J. Banhart, I. Duarte, A Study of Aluminum Foam Formation-Kinects and Microstructure, Acta Mater. 48 (2000) 2349-2362.

DOI: 10.1016/s1359-6454(00)00020-3