Aluminum–ceramic cenospheres syntactic foams produced by powder metallurgy route

Vogiatzis, C. A.; Tsouknidas, Alexander; Kountouras, D. T.; Σκολιανός, Σ.

doi:10.1016/j.matdes.2015.06.154

Cited by 91 publications

(70 citation statements)

References 39 publications

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“…Since the original aim of the production of MMSFs was to provide low-weight structural materials with high energy absorbing capacity, the matrix materials of MMSFs are often come from the lightweight alloys such as aluminium (most often, [1][2][3][4][5][6][7][8][9][10][11][12]) and magnesium [13][14][15][16]. However, efforts have been invested into the production of different MMSFs with iron- [17][18][19], titanium- [20][21][22] or zinc [23][24][25][26][27][28] alloys.…”

Section: Introductionmentioning

confidence: 99%

Compressive characteristics of bimodal aluminium matrix syntactic foams

Orbulov

Kemény

Filep

et al. 2019

Composites Part A: Applied Science and Manufacturing

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High performance metal matrix syntactic foams (MMSFs) have been produced by liquid state infiltration of AlSi12 alloy into two loosely packed sets of different nominal diameter (150 μm and 1500 μm) oxide hollow spheres (CHSs) and their mixed packs. The structure of the MMSFs has been studied by X-ray computer tomography and microscopy. The mechanical properties were mapped by compressive tests. The structural investigations showed proper infiltration. In the case of pure small and large CHS filler, the compressive tests revealed high strength levels all over the deformation of the materials up to 50% compressive strain, with the dominance (higher strength values) of the smaller CHSs filled MMSFs. In the case of bimodal CHS filling, the compressive features of the MMSFs have been mixed with two local peaks corresponding to the failure of the smaller and larger CHS filled MMSFs. Rule of mixtures is applicable to estimate the compressive strength.

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Section: Introductionmentioning

confidence: 99%

Compressive characteristics of bimodal aluminium matrix syntactic foams

Orbulov

Kemény

Filep

et al. 2019

Composites Part A: Applied Science and Manufacturing

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“…It is clearly observed that the foams fabricated by both the HP and SPS exhibit slightly lower elastic coefficients than the theoretical ones. One possible reason for this low moduli is the presence of fractured GHS fragments in the ASFs, which can cause insufficient bonding between the Al particles and reduce the modulus of elasticity [12]. Figure 10 shows indentation depths of the Al matrix and the GHS shell of the ASF with 30 vol.% GHS.…”

Section: Resultsmentioning

confidence: 99%

“…They also pointed out that a significant amount of GHS can easily be broken or filled with matrix during the infiltration process. To overcome these problems, some recent studies have devoted to fabricate ASFs though powder metallurgy route [9][10][11][12]. As an example, Vogiatzis et al [12] investigated to macro and micro structural characteristics, compressive strength and deformation mechanisms of syntactic foams produced by powder metallurgy route at hot pressing (HP) sintering.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Hollow Glass Sphere Containing Aluminum Syntactic Foam by Spark Plasma Sintering and Hot Pressing

Son

Lee

Jung

et al. 2019

Metals

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The effect of sintering process on the microstructure and the mechanical properties of aluminum syntactic foam were investigated in this study. Two different sintering processes of spark plasma sintering and hot pressing were used. Glass hollow spheres with a size of 50–80 μm was used to fabricate the foams having various volume fractions of the spheres in the range of 10–30%. Microstructural analysis revealed that the glass hollow spheres were uniformly distributed in the aluminum matrix, both in the spark plasma sintered and hot pressed ones. As the volume fraction of the spheres increased from 10 to 30%, the density, micro-hardness and compressive strength of the foams were decreased. In comparison to the foams fabricated by hot pressing method, the spark plasma sintered foams had slightly lower density and mechanical strength. In nanoindentation study, it was found that the aluminum matrix in the foam prepared by the spark plasma sintering process had lower strength than foam prepared by the hot pressing process. This is likely because of shorter sintering time used in the spark plasma sintering process than the hot pressing.

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“…Although Al is capable in reducing the weight of automotive components mechanical properties of aluminum such as hardness, strength and impact properties should be improved. Several studies have been performed to meet these challenges in terms of the processing route, design and material modification (Krishna & Xavior 2014;Latif, Sajuri & Syarif 2014;Sun, Lyu, Jiang & Zhao 2014;Vogiatzis, Tsouknidas, Kountouras & Skolianos 2015).…”

Section: Introductionmentioning

confidence: 99%