Characterization and physical properties of aluminium foam–polydimethylsiloxane nanocomposite hybrid structures

Abstract

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Hybrid Structures Made of Polyurethane/Graphene Nanocomposite Foams Embedded within Aluminum Open-Cell Foam

“…The effect of filling the voids of Al-OC foams with bulky polymers has been reported [10][11][12]54], showing enhanced mechanical properties due to the pore filling which improves the compressive strength and energy absorption capacity of the hybrid foams. However, the use of bulky polymers to fill the voids of the Al-OC foams can be disadvantageous when lightweight structures are required.…”

“…However, it should be noted that the weight of these structures is much lighter, and a good compromise between weight and strength can be achieved. Contrary to the hybrid structures composed by the Al-OC impregnated with dense polymers, epoxy [12] and polydimethylsiloxane [11], whose compressive mechanical behavior is governed by the dense materials, in this case it is the metal skeleton (Al-OC) that controls the compressive response under loading, as reported in a similar study describing the Al-OC filled with bacterial cellulose nanocomposite foam [15]. However, it should be noted that the weight of these structures is much lighter, and a good compromise between weight and strength can be achieved.…”

“…However, they present a low compressive strength, when compared, for example, with closed pore cell foams. To overcome this drawback, Al-OC foams can be combined with other materials, such as silicone [10,11], epoxy [10,12], or polyurethane [13]. Although the mechanical performance of the composite foams is compensated, their final weight is increased, which is not desirable for certain applications requiring lightweight structures.…”

The Effects of Post Heat Treatment on the Microstructural and Mechanical Properties of an Additive-Manufactured Porous Titanium Alloy

“…Compared to fully dense materials, porous metallic materials have many excellent properties [1], such as low density, large specific surface area, good energy absorption, and excellent permeability; therefore, they are widely used in the aerospace [2], automobile [3], architecture, medical [4][5][6][7], environmental protection [8], and acoustics [9] industries. Moreover, porous structures are ubiquitous and have been found in bones, bamboo, wood, and coral.…”

Combined Fuzzy and Genetic Algorithm for the Optimisation of Hybrid Composite-Polymer Joints Obtained by Two-Step Laser Joining Process

“…The main reason of this revolution must be sought in the request of more and more reduced environmental impact, with low fuel consumption, CO 2 emissions and at the same time, improved performances for commercial, industrial and military applications [1,2]. In particular, the transport industry is paying great attention to high-performance lightweight hybrid structures for their capability 2 of 15 in offering different opportunities that are not achievable if the materials are used individually [3,4], e.g., obtaining components characterized by high strength and toughness, with the presence of transparent areas for inspection or aesthetical reasons.…”