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Showing 1 to 14 of 14 for “"Metallic Foams"”.
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Porous metals and metallic foams
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Mechanical behavior of closed-cell and hollow-sphere metallic foams
… on the mechanical behavior of hollow-sphere foams. The analysis indicates that at relative densities of 10%, hollow-sphere foams have theoretical moduli and strengths that are three times those of existing metallic foams, and this increases to a factor of ten at relative densities below 5%. …
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Comprehensive Characterization of Nickel-Based Metallic Foams and Their Applications as Electrocatalyst Materials
… explores the applicability of nickel-based metallic foams as active electrodes and as electrocatalyst support materials. A comprehensive characterization of Ni and multi-component Ni-based foams is presented and includes the analysis of their structural, chemical, and electrochemical …
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Effect of properties of metallic foams on stiffness and strength of sandwich beams
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.
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High temperature mechanical properties of cast as well as powder metallurgical manufactured metallic foams
… mechanical properties of different types of metallic foams. The foams which have been used in this work were manufactured by two different processing methods. Al-foams (trade-name Alporas) were processed by a melt metallurgical route whereas Distaloy as well as Astaloy foams which are based …
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Molecular dynamics simulation of mechanical behavior of nanoporous copper foams
Metallic foams have a variety of unique mechanical properties that make them prime candidates for many different applications. Recent developments in manufacturing have allowed for the creation of nanoporous foams but still relatively little is known about foam behavior on the nano-scale. To …
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Aluminium foam production using calcium carbonate as a foaming agent
… of the art with regards to the production of metallic foams is reviewed, with melt-based processes identified as the most promising for cost-effective large-scale production. The potential for metal carbonates as an alternative to currently-used titanium hydride foaming agents is explored, …
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Catalysts for H2 production
… having high thermal conductivity (SiC and metallic foams). As regards the catalytic partial oxidation, the effect of the metal (Ni and/or Rh), the role of the metal/matrix ratio and the matrix formulation of innovative catalysts obtained from hydrotalcite type precursors and from …
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Syngas production using a catalytic engine
… the use and effects of a catalyst deposited on metallic foams placed in a one-cylinder compression-ignition engine, operating either in partial oxidation mode in combination with dry reforming. The metallic foam is attached to the bowl in the piston to carry out the chemical reaction. We …
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Structural Design Inspired by the Multiscale Mechanics of the Lightweight and Energy Absorbent Cuttlebone
… capability under compression comparable to many metallic foams (~4.4 kJ/kg). Here we computationally investigate how such a remarkable mechanical efficiency is enabled by the multiscale structure of cuttlebone. Using the common cuttlefish, Sepia Officinalis, as a model system, we first conducted …
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Optimal Blast-Resistant Sandwich Structures with Transversely Isotropic, Elasto-plastic Polymeric Foams as Cores
… of the order of 4000 /s are observed. Unlike metallic foams polymeric foams exhibit transversely isotropic response when tested in a laboratory setting. More specifically, they exhibit different hardening along the foam thickness than that in a direction transverse to the thickness. …
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Multi-Fidelity Analysis and Optimization of Lightweight Structures Subject to Significant Fluid-Structure Interaction Effects
… weight. Specifically, this thesis focuses on metallic foams, which feature an extended plastic plateau during which their cellular structure collapses due to wall buckling or yielding, followed by a nonlinear densification stage where the material rapidly gains strength. To capture this …
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Investigation of heat transfer in metal-foam tubes
Nowadays metallic foams attract increasing attention in making compact heat exchangers due to its advanced thermal properties. In this project, the performance of forced convection and flow boiling heat transfer in metal-foam tubes has been investigated experimentally and theoretically. Compared to …