Joule Heating and mechanical properties of epoxy/graphene based aerogel composite

2021 ◽  
pp. 109199
Author(s):  
Pei Yang ◽  
Subrata Ghosh ◽  
Tian Xia ◽  
Jiacheng Wang ◽  
Mark A. Bissett ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Joule Heating ◽  
Aerogel Composite

Clay Aerogel Composite Materials

2010 ◽  
Vol 63 ◽  
pp. 147-151 ◽  
Author(s):  
David A. Schiraldi ◽  
Matthew D. Gawryla ◽  
Saeed Alhassan
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Environmentally Friendly ◽  
Porous Ceramics ◽  
Low Density ◽  
Polymer Foams ◽  
Freeze Dried ◽  
Aerogel Composite ◽  
Environmentally Friendly Process

A simple, inexpensive, and environmentally-friendly process for converting mixtures of clays and polymers has been developed. Polymer and clay are combined in water, and the mixtures are freeze dried to produce materials which have bulk densities typically in the range of 0.03 – 0.15 g/cm3. These low density polymer/clay aerogel materials possess good mechanical properties similar to those of traditional polymer foams, can be reinforced with fibers, modified with nanoparticles, biomineralized, or converted into porous ceramics.

scholarly journals Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 84 ◽  
Author(s):  
Ilya Okulov ◽  
Ivan Soldatov ◽  
Ivan Kaban ◽  
Baran Sarac ◽  
Florian Spieckermann ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metallic Glass ◽  
Heating Rate ◽  
Joule Heating ◽  
Annealing Time ◽  
Volume Fraction ◽  
Glassy Material ◽  
Flash Annealing ◽  
Temperature Equilibrium

Flash Joule-heating was applied to the Cu47.5Zr47.5Al5 metallic glass for designing fully crystalline metastable nanocomposites consisting of the metastable B2 CuZr and low-temperature equilibrium Cu10Zr7 phases. The onset of crystallization was in situ controlled by monitoring resistivity changes in the samples. The effect of heating rate and annealing time on the volume fraction of the crystalline phases and mechanical properties of the nanocomposites was studied in detail. Particularly, an increase of the heating rate and a decrease of the annealing time lead to a lower number of equilibrium Cu10Zr7 precipitates and an increase of tensile ductility. Tailoring of these non-equilibrium microstructures and mechanical properties may not be possible unless one starts with a fully glassy material that opens new perspectives for designing metastable nanomaterials with unique physical properties.

Nanocrystalline Fe73.5 Cu1Nb3Si13.5B9 obtained by direct-current Joule heating. Magnetic and mechanical properties

1993 ◽  
Vol 68 (6) ◽  
pp. 853-860 ◽  
Author(s):  
P. Allia ◽  
M. Baricco ◽  
M. Knobel ◽  
P. Tiberto ◽  
F. Vinai
Keyword(s):  
Mechanical Properties ◽  
Joule Heating ◽  
Direct Current

Anisotropic Clay Aerogel Composite Materials

2009 ◽  
Vol 1188 ◽  
Author(s):  
Matthew D Gawryla ◽  
David A. Schiraldi
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Composite Materials ◽  
Layered Structure ◽  
Anisotropic Materials ◽  
Expanded Polystyrene ◽  
Environmentally Benign ◽  
Aerogel Composite ◽  
Benign Process ◽  
Made In

AbstractClay aerogel composites have been around for over 50 years but still they represent a relatively under studied class of materials. Clay aerogel composites have been made in our labs that have low densities, 0.05-0.1g/cm3, provide good thermal insulation, k 0.02W/mK, and are created through an environmentally benign process. The mechanical properties of the composites resemble those of typical foamed polymers such as expanded polystyrene and polyurethane, with compressive moduli ranging from 0.5MPa to 40MPa depending on composition. Aqueous solutions of clay and polymer are frozen in cylindrical molds and freezedried to create these foam-like materials. Typically there is no particular orientation to the often layered structure that results, however if frozen in a unidirectional manner, anisotropic materials can be made. In this paper we will discuss the effects of molecular weight on mechanical properties of various composites as well as discussing the orientated layered structure within the anisotropic materials.

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