Handbook of Cellular Metals

Degischer, H. P.; Kriszt, B.

doi:10.1002/3527600558

Cited by 305 publications

(13 citation statements)

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“…The density was determined by measuring all the sizes and masses of samples that would be used to assess the compression behaviour, and resulting data were used to assess the mean density of each size. The average of all mean densities was 2.9045 ± 0.2021 g/cm 3 .…”

Section: Compression Testsmentioning

confidence: 95%

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Effects of the size and matrix microstructure on compression of borosilicate spheres - Zn22Al2Cu composites with foam behaviour.

Aragón-Lezama

2018

Rev. Mex. Fís.

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Borosilicate spheres - Zn22Al2Cu composites with a 2.9 g/cm3 density were prepared to assess whether changes in size affect the compression behaviour and whether this effect depends on the alloy matrix microstructure. The composite material was manufactured first by alloy melting, then by sphere submersion into the liquid alloy and finally by air-cooling the resulting mixture to room temperature. The matrix microstructures used separately were as-cast microstructure and fine microstructure. They were characterised by optical and scanning electron microscopies as well as by an energy dispersive X-ray spectroscopy (EDS) compositional analysis of polished and etched samples. The compression was tested in three samples of each size at a 1 mm/min crosshead speed. The compression curves of composites with fine microstructure in matrix are similar in shape to those of ideal metallic foams, whereas curves of the composites having as-cast microstructure in matrix have a shape like compression curves of Zn and Al2O3 foams. The as-cast microstructure is more susceptible to changes in size than is the fine microstructure. Thus, the foam compression behaviour of borosilicate spheres - Zn22Al2Cu composites changes with the increase in size, and this change depends on the matrix microstructure.

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Section: Compression Testsmentioning

confidence: 95%

“…This alloy also presents a pearlite eutectoid microstructure consisting of alternating α and β phases with a lamellar shape when slowly cooled inside an oven from a temperature higher than 275 • C to room temperature [3].…”

Section: Introductionmentioning

confidence: 99%

Effects of the size and matrix microstructure on compression of borosilicate spheres - Zn22Al2Cu composites with foam behaviour.

Aragón-Lezama

2018

Rev. Mex. Fís.

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“…As seen in the graph, the lowest density and the maximum expansion rate were reached after foaming for 3.5 min. In the same period of exposure the densities of samples deformed by 70%, 50%, 30% and 10% were calculated to be 0.40, 0.52, 0.75 and 1.99 g/cm 3 respectively. But the densities of samples increased after that time up to 5 minutes.…”

Section: Density Porosity and Structure Of Poresmentioning

confidence: 99%

“…The result is a high reproducibility of the expansion level in contrast to foam expansion in moulds. The manufactured parts have a relatively small volume (volume <1 cm 3 ). These parts are combined with a simple bonding technique ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…Combination of these properties provides that these structures to be widely used in structural and functional applications. Al-based foams have a great potential to be utilized in the fields of automobile, aerospace, shipment, railway and civil construction [1][2][3][4] . Metallic foams have been produced using different manufacturing methods because of intensive research in this field and the developments in today's technology.…”

Section: Introductionmentioning

confidence: 99%

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The effect of production parameters on the foaming behavior of spherical-shaped aluminum foam

Uzun

Türker

2014

Mat. Res.

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The effect of production parameters on the foaming behavior of spherical-shaped aluminum foam was studied. Elemental powders of Alumix 231 and 1% TiH 2 were mixed, compacted at 600 MPa pressure by using a uniaxial action press to produce blanks with 50×30×10 mm in dimensions. These blanks were pre-heated at 550 °C in a furnace for 180 min and then deformed by 10, 30, 50 and 70% by using an eccentric press. They were cut into square shape and foamed at temperatures between 650 °C and 710 °C. It was experimentally found that, the volume expansion rate of foam increases but the maximum foaming duration decreases with increasing the deformation rate and foaming temperature. In these studies 70% deformation and 3.5 minutes foaming duration were found to be the best for the production of spherical foams. This was determined by obtaining the maximum expansion, lower density and homogeneously distributed pores with spherical foams. It was also found that 10% deformation rate was not enough for foaming.

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