Preparation of open-celled aluminum foams by counter-gravity infiltration casting

Huo, Deng-wei; Yang, Juan; Zhou, Xiangyang; Wang, Hui; Zhang, Tai-kang

doi:10.1016/s1003-6326(11)61144-8

Cited by 17 publications

(10 citation statements)

References 13 publications

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“…Counter-gravity infiltration casting was used to manufacture cylindrical syntactic foam samples (see Figure 1 ) with a diameter of 20 ± 0.25 mm and 30 ± 0.2 mm height. This technique was also employed to manufacture aluminum alloy syntactic foams [ 28 ]. The method allows producing syntactic foam samples with similar densities and a uniform distribution of filler particles [ 9 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of Heat Treatment on the Compressive Behavior of Zinc Alloy ZA27 Syntactic Foam

et al. 2019

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Zinc alloy (ZA27) syntactic foams (SF) were manufactured using expanded perlite (EP) particles and counter-gravity infiltration casting. Due to a variation of the metallic matrix content, the density of the produced foam samples varied from 1.78 to 2.03 g·cm−3. As-cast and solution heat-treated samples were tested to investigate the compressive properties of the ZA27 syntactic foam. To this end, quasi-static compression tests were conducted. In addition, microstructural analysis of the as-cast and heat-treated syntactic foams was carried out using scanning electron microscopy. The results indicate that the heat treatment alters the microstructure of the ZA27 alloy matrix from a multiphase dendrite to a spheroidized microstructure with improved ductility. Moreover, the heat treatment considerably enhances the energy absorption and plateau stress ( σ pl ) of the syntactic foam. Optical analysis of the syntactic foams under compression shows that the dominant deformation mechanism of the as-cast foams is brittle fracture. In comparison, the heat-treated samples undergo a more ductile deformation.

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Section: Methodsmentioning

confidence: 99%

Effect of Heat Treatment on the Compressive Behavior of Zinc Alloy ZA27 Syntactic Foam

et al. 2019

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“…This foam showed similar compressive stress strain curves with a plateau stress σ pl = 29 MPa. It should be noted that the sulphate particles were leached out after infiltration (replication process) and thus did not contribute to the mechanical strength of the foam [54]. Based on the similar compressive behaviour, it can be assumed that the analogous perlite particles do not have a significant contribution to the mechanical strength of the EP/A356 syntactic foam.…”

Section: Compressive Responsementioning

confidence: 96%

“…It is of interest to compare the mechanical properties of the EP/A356 syntactic foam with open cell foams made of the same matrix material and with a similar pore size. An A356 open cell foam was produced by infiltration of spherical soluble sulphate particles with a diameter of 3mm [54]. This foam showed similar compressive stress strain curves with a plateau stress σ pl = 29 MPa.…”

Section: Compressive Responsementioning

confidence: 99%

Low-density expanded perlite–aluminium syntactic foam

Taherishargh¹,

Belova²,

Murch³

et al. 2014

Materials Science and Engineering: A

104

120

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This paper addresses an innovative syntactic foam (SF) formed by counter-gravity infiltration of a packed bed of low-cost expanded perlite (EP) particles with molten A356 aluminium. The uniform distribution of EP particles in foams causes an even density throughout the height. Due to the low density (~0.18 g/cm 3) of EP, the average density of these foams is only 1.05 g/cm 3 which is considerably lower than most studied SFs. Owing to the high porosity of the filler material (~94%), the total porosity of the new foam reaches 61%. Microstructural observations reveal no sign of damage or unintended EP particle infiltration. EP shows a good wettability whilst essentially no reaction occurs at the EP-metal interface. Under compression, EP\A356 syntactic foam shows stress-strain curves consisting of elastic, plateau and densification regions. On account of its consistent plateau stress (average value 30.8 MPa), large densification strain (almost 60%), and high energy absorption efficiency (88%) EP\A356 syntactic foam is an effective energy absorber.

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“…The conventional inltration casting method mainly utilizes mechanical pressure (piston or gas), however, it is insufficient to effectively overcome the surface tension of liquid metals and the residue gas in the interstices or voids of preform is hard to be completely squeezed out, hence, it is difficult to achieve the complete ll of the preform with molten metals. [8][9][10] It is known that under super-gravity elds (created by a centrifugal apparatus), the mass transfer and migration of heterogeneous phases can be enhanced immensely. 11 Driven by these qualities, the super-gravity technology has been successfully applied in many elds so far, such as chemical industry (distillation, 12 absorption 13 and sulfonation 14 ), metallurgy (purication of metals 15 and valuable element recovery from slag melts 16 ) and material preparation.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of open-cell aluminum foams via infiltration casting in super-gravity fields and mechanical properties

et al. 2018

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Preparation of open-celled aluminum foams by counter-gravity infiltration casting

Cited by 17 publications

References 13 publications

Effect of Heat Treatment on the Compressive Behavior of Zinc Alloy ZA27 Syntactic Foam

Effect of Heat Treatment on the Compressive Behavior of Zinc Alloy ZA27 Syntactic Foam

Low-density expanded perlite–aluminium syntactic foam

Manufacturing of open-cell aluminum foams via infiltration casting in super-gravity fields and mechanical properties

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