Structure and properties of AlSiC foam

Prakash, Om; Sang, H.; Embury, J.D.

doi:10.1016/0921-5093(94)09708-9

Cited by 129 publications

(43 citation statements)

References 7 publications

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“…Early work on the indentation of foams has suggested that it is controlled to a large extent by its compressive strength [1,2]. Preliminary work on the indentation of foams was presented by Andrews et al [3], Onck et al [4], Gibson and Ashby [5], Tulliani et al [6], Stupak and Donovan [7] and Prakash et al [8]. The average indentation pressure was reported as a function of indenter geometry and contact area, with limited experimental data.…”

Section: Introductionmentioning

confidence: 99%

Indentation resistance of an aluminium foam

2000

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Section: Introductionmentioning

confidence: 99%

Indentation resistance of an aluminium foam

2000

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“…[10][11][12][13] There have been considerable researches about the effect of the cell macrostructures on the mechanical properties of the foams. However, the studies on the correlation between microstructure and compressive properties of metallic foams are scarce.…”

Section: -10)mentioning

confidence: 99%

Fabrication, Microstructure and Compression Properties of AZ31 Mg Foams

Zhao¹,

Li²,

Jeong³

et al. 2011

Korean. J. Mater. Res.

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Melt foaming method is one of cost-effective methods to make metal foam and it has been successfully applied to fabricate Mg foams. In this research, AZ31 Mg alloy ingot was used as a metal matrix, using AlCa granular as thickening agent and CaCO 3 powder as foaming agent, AZ31 Mg alloy foams were fabricated by melt-foaming method at different foaming temperatures. The porosity was above 41.2%~73.3%, pore size was between 0.38~1.52 mm, and homogenous pore structures were obtained. Microstructure and mechanical properties of the AZ31 Mg alloy foams were investigated by optical microscopy, SEM and UTM. The results showed that pore structure and pore distribution were much better than those fabricated at lower temperatures. The compression behavior of the AZ31 Mg alloy foam behaved as typical porous materials. As the foaming temperature increased from 660

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“…In addition, in comparison with polymer foams, they have excellent recycling efficiency, high specific stiffness, good thermal conductivity and high melting point. Many previous researches have been carried out on development and establishment of manufacturing processes in order to produce the porous metals with consistent properties, [8][9][10][11][12][13] and also on investigation of their various characteristics for high degree of freedom in engineering design. [14][15][16][17][18] These efforts have generated a more diversified range of useful and cost-effective manufacturing technologies, with enhancing a fundamental understanding of the porous metals.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Porous Metals Using Friction Phenomena

2009

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The surface region of the aluminum foams (trade name ALPORAS) was modified through the friction stir processing (FSP) which was performed by using friction phenomena with a high-speed rotating tool. The tool was rotated at speeds ranging from 820 to 2400 rpm, and plunged from the top surface of the aluminum foam, and then traversed at speeds ranging from 50 to 300 mm/min. The surface-modified zone (SMZ) had considerably smoother surface in comparison to the unprocessed zone (UZ). Especially for 1390 rpm and 150 mm/min, the smoothest surface was obtained, which was attributed to the smaller amount of pores in the SMZ. In addition, a very dense layer was formed near the surface of the SMZ through the localized collapse and densification of the cell structure near the surface region, which was attributed to the friction phenomena with the high-speed rotating tool. The mechanical properties of the aluminum foams were significantly improved through the FSP. Especially for 1390 rpm and 150 mm/min, the SMZ exhibited the highest average maximum indentation strength and energy absorption ability, which were equivalent to about 2.2 times the values of the UZ. The tool rotation speed and the tool traverse speed were very important parameters not only in controlling the surface morphology, but also in improving the mechanical properties of the aluminum foams. The FSP was a very effective technology for the remarkable improvement in the mechanical properties through the cell structure control of the surface region of the aluminum foams, without any dense skin materials.

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Structure and properties of AlSiC foam

Cited by 129 publications

References 7 publications

Indentation resistance of an aluminium foam

Indentation resistance of an aluminium foam

Fabrication, Microstructure and Compression Properties of AZ31 Mg Foams

Surface Modification of Porous Metals Using Friction Phenomena

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