The synthesis, compressive properties, and applications of metal matrix syntactic foams

Rohatgi, Pradeep K.; Gupta, Nïkhil; Schultz, Benjamin F.; Luong, Dung D.

doi:10.1007/s11837-011-0026-1

Cited by 113 publications

(77 citation statements)

References 49 publications

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“…Although the steel mold was heated up to 773 K (500°C), using cold cenospheres hampered the molten matrix stream by crystallizing phases. Analogical porosity was also observed by Rohatgi et al [6] in the microstructure of A356/fly ash cenosphere syntactic foam. In the case of the AZ91/FAs-CH composite, both hot cenospheres and mold enabled filling of all the spaces between the cenospheres by the molten alloy matrix (Figure 6).…”

Section: Resultssupporting

confidence: 82%

“…[1][2][3] What is more, metal matrix composites based on different matrix alloys with fly ash cenospheres are materials that have recently been intensively investigated. [4][5][6] Cenospheres (also called microballoons) are thin-walled, hollow, ceramic particles of different sizes (up to 500 lm) and a very low true density equal to about 0.4 to 0.6 g/cm 3 . The cenosphere walls belong to glass ceramic materials based on aluminosilicate glass, mullite, quartz, calcite, iron oxides, and calcium silicates and sulfates.…”

Section: Introductionmentioning

confidence: 99%

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The Role of Ni-P Coating Structure on Fly Ash Cenospheres in the Formation of Magnesium Matrix Composites

Braszczyńska-Malik

Kamieniak

2017

Metall Mater Trans A

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The role of the Ni-P coating structure on fly ash cenospheres in the fabrication of magnesium matrix composites has been investigated. Two composites based on AZ91 commercial magnesium alloys with hollow aluminosilicate cenospheres were fabricated by the negative pressure infiltration technique. Two kinds of cenospheres (i.e., as Ni-P coated and after heat treatment) were used in order to determine the influence of the Ni-P coating structure on creating interfaces between the components. Microstructure analyses were carried out by light microscopy, atomic force microscopy, XRD, scanning, and transmission electron microscopy. Al 3 Ni 2 and Mg 2 Ni intermetallic phases at the component interfaces were formed in the composite with as-received Ni-P-coated cenospheres. After heat treatment of the Ni-P-coated cenospheres, NiO was created outside the external layer of the Ni-P coatings and this oxide remained stable at the component interfaces during composite fabrication. In both cases, the Ni-P coating prevented the reaction between the cenosphere walls and the magnesium matrix alloy, which contributed to obtaining intact cenospheres, unfilled by the matrix alloy.

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Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

The Role of Ni-P Coating Structure on Fly Ash Cenospheres in the Formation of Magnesium Matrix Composites

Braszczyńska-Malik

Kamieniak

2017

Metall Mater Trans A

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“…Under constrained conditions, localization was suppressed and the flow stress increased monotonically. Different matrix (Mg and Zn alloys) syntactic foams were studied by Rohatgi et al, Daoud [8,9,47,48] and Huang et al [49,50]. The hollow spheres decreased the density and the foams became stiffer and stronger, than the conventional ones.…”

Section: Introductionmentioning

confidence: 99%

Characteristic compressive properties of hybrid metal matrix syntactic foams

Májlinger

Orbulov

2014

Materials Science and Engineering: A

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Hybrid metal matrix syntactic foams (hybrid MMSFs) are particle reinforced composites in which the reinforcement is the combination of more than one grade of hollow spheres. The difference between the spheres can be in their chemical composition, dimension, physical properties etc. In this study AlSi12 matrix hybrid MMSFs with monomodal Globocer (Al2O3 and SiO2 based ceramic) and Globomet (pure Fe) reinforcements were produced by pressure infiltration. The investigation parameters were the ratio of the hollow sphere grades and the aspect ratio of the specimens. Microstructural investigations showed almost perfect infiltration and favourable interface layer, while quasi-static compression tests showed that the composition of the reinforcement and the aspect ratio of the specimens have determinative effect on the characteristic properties (compressive and flow strength, fracture strain, stiffness and absorbed energy). This nature of the MMSFs ensures the possibility to tailor their properties in order to optimise them for a given application.

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“…), therefore their behaviour under compressive loading has been widely studied. For example, Gupta et al [2][3][4][5][6][7] studied the quasi-static and high strain rate properties of various MMSF systems, such as Al-Al2O3 or more unique Al-SiC MMSFs. Rabiei et al [8][9][10] developed CMFs with high energy absorbing capacity and revealed that the high strain rate and the quasi-static strain rate tests can overlap each other.…”

Section: Introductionmentioning

confidence: 99%

Global Approach of Tribomechanical Development of Hybrid Aluminium Matrix Syntactic Foams

et al. 2016

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Hybrid syntactic foams with AlSi12 aluminum matrix were produced by pressure infiltration. The volume ratio of iron and ceramic hollow sphere reinforcement (in the same size range) was varied and hybrid syntactic foams were also produced with bimodal size ceramic reinforcement. 2Previously a very detailed analysis of the mechanical properties of the composites was made with quasi-static compression tests and their tribological properties were investigated by pin-on-disc method in dry and lubricated conditions. The present article establishes and clarifies the correlations between mechanical and tribological properties. The coefficient of friction, height loss of the specimens and specific wear showed good correlation to different mechanical parameters e.g. density, structural stiffness and yield strength.The established trends and correlations between mechanical and tribological behavior enables a better understanding for materials design and selection for further applications for mechanically loaded sliding machine parts.

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The synthesis, compressive properties, and applications of metal matrix syntactic foams

Cited by 113 publications

References 49 publications

The Role of Ni-P Coating Structure on Fly Ash Cenospheres in the Formation of Magnesium Matrix Composites

The Role of Ni-P Coating Structure on Fly Ash Cenospheres in the Formation of Magnesium Matrix Composites

Characteristic compressive properties of hybrid metal matrix syntactic foams

Global Approach of Tribomechanical Development of Hybrid Aluminium Matrix Syntactic Foams

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