3K-3 On the Efficiency of Several Active Materials Used for Vibration Damping

2006 ◽  
Author(s):  
C. Granger ◽  
A.-C. Hladky-Hennion ◽  
M. Phamthi
Keyword(s):  
Vibration Damping ◽  
Active Materials ◽  
Materials Used

scholarly journals Insights into the Influence of Key Preparation Parameters on the Performance of MoS2/Graphene Oxide Composites as Active Materials in Supercapacitors

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1553
Author(s):  
Catalin Alexandru Salagean ◽  
Codrut Costinas ◽  
Liviu Cosmin Cotet ◽  
Lucian Baia
Keyword(s):  
Graphene Oxide ◽  
Transition Metal Dichalcogenides ◽  
Specific Area ◽  
Active Materials ◽  
Energy Demands ◽  
Reduced Graphene ◽  
Metal Dichalcogenides ◽  
Materials Used ◽  
Oxide Composites ◽  
High Specific Area

Advances in energy storage and energy conversion play an essential role nowadays because the energy demands are becoming greater than ever. To overcome the actual performances of the materials used to build supercapacitors, a combination of transition metal dichalcogenides (TMDCs) and graphene oxide (GO) or reduced graphene oxide (rGO) as graphene-based structures are often studied for their excellent properties, such as high specific area and good electrical conductivity. Nevertheless, synthesis pathways and parameters play key roles in obtaining better materials as components for supercapacitors with higher technical performances. Driven by the desire to understand the influence of the structural and morphological particularities on the performances of supercapacitors based on MoS2/graphene oxide (GO) composites, a survey of the literature was performed by pointing out the alterations induced by different synthesis pathways and key parameters to the above-mentioned particularities.

scholarly journals Low Reversible Capacity of Nitridated Titanium Electrical Terminals

Batteries ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 17 ◽  
Author(s):  
David Klein ◽  
Yaolin Xu ◽  
Robert Schlögl ◽  
Sébastien Cap
Keyword(s):  
Thin Films ◽  
Active Material ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Differential Capacity ◽  
Active Materials ◽  
Experimental Conditions ◽  
Manufacturing Method ◽  
Planar Substrate ◽  
Materials Used

The currently preferred manufacturing method for Lithium-ion battery (LIB) electrodes is via the slurry route. While such an approach is appealing, the complexity of the electrode layers containing the active materials, conductivity helpers, and binders, has hampered detailed investigations of the active materials. As an alternative, an active material can be deposited as a thin film on a planar substrate, which enables a more robust and detailed analysis. However, due to the small areal capacity of nanometric thin films, the electrochemical activity of the cell casing must be negligible or at least well determined. We reported on the capacity and the differential capacity metrics of several materials used in the construction of the electrical terminals in LIBs. Among these materials, Ti was revealed to have the minimum reversible capacity for lithium-ion storage. The mechanical and electrochemical properties of the Ti–based materials were further improved through surface nitridation with thermal treatment in an ammonia-rich atmosphere. The nitridated Ti electrical terminal achieved a reversible capacity that was at least fifteen times lower than that of stainless steel, with a featureless differential capacity representation creating quasi-ideal experimental conditions for a detailed investigation of electroactive thin films.

scholarly journals Sensors Made of Natural Renewable Materials: Efficiency, Recyclability or Biodegradability—The Green Electronics

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5898
Author(s):  
Benoît Piro ◽  
Hoang Vinh Tran ◽  
Vu Thi Thu
Keyword(s):  
Electronic Materials ◽  
Packaging Materials ◽  
Renewable Materials ◽  
Active Materials ◽  
Recent Advances ◽  
Sensor Devices ◽  
Materials Used ◽  
Passive Materials ◽  
Green Electronics

Nowadays, sensor devices are developing fast. It is therefore critical, at a time when the availability and recyclability of materials are, along with acceptability from the consumers, among the most important criteria used by industrials before pushing a device to market, to review the most recent advances related to functional electronic materials, substrates or packaging materials with natural origins and/or presenting good recyclability. This review proposes, in the first section, passive materials used as substrates, supporting matrixes or packaging, whether organic or inorganic, then active materials such as conductors or semiconductors. The last section is dedicated to the review of pertinent sensors and devices integrated in sensors, along with their fabrication methods.

Attenuation of dilatational wave in ferromagnetic shape memory alloy polyurethane polymer composites

2016 ◽  
Vol 51 (19) ◽  
pp. 2727-2732
Author(s):  
Chelliah Mahalakshmi ◽  
Racil Jeya Geetha ◽  
Shanmugam Vinodh Kumar ◽  
Sonai Seenithurai ◽  
Manickam Mahendran
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Polymer Composites ◽  
Mechanical Energy ◽  
Vibration Damping ◽  
Ferromagnetic Shape Memory Alloy ◽  
Dilatational Wave ◽  
Custom Made ◽  
Materials Used ◽  
Ferromagnetic Shape Memory

The ferromagnetic shape memory alloy polyurethane, Ni-Mn-Ga-PU, polymer composites absorb more mechanical energy than the conventional materials used for vibration damping applications. The vibration damping has been investigated using the custom-made experimental setup. The computed resonance peak values are in agreement with the experimental data. The dilatational wave decreases at high frequencies which is consistent with the theory of resonance frequency. The previously free end of the system increases the amplitude stress for an appreciable static load but loss appears to be very small. The 20% ferromagnetic shape memory alloy in polyurethane absorbs much more energy than the pure polyurethane due to the movement of twin boundaries present in Ni-Mn-Ga. The Ni-Mn-Ga-PU polymer composites of this nature can be a suitable candidate for acoustic attenuation applications.

scholarly journals Simulation Study for the Energy Resolution Performances of Homogenous Calorimeters with Scintillator-Photodetector Combinations

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
G. Aydın
Keyword(s):  
Energy Resolution ◽  
Simulation Study ◽  
Particle Physics ◽  
Computational Study ◽  
High Energy ◽  
Simulation Program ◽  
Geant4 Simulation ◽  
Active Materials ◽  
Materials Used ◽  
Physics Experiments

The scintillating properties of active materials used in high energy and particle physics experiments play an important role regarding the performances of both calorimeters and experiments. Two scintillator materials, a scintillating glass and an inorganic crystals, were examined to be used for collider experiments showing good optical and scintillating properties. This paper discusses the simulated performances of two materials of interest assembled in a scintillator-photodetector combination. The computational study was carried out with Geant4 simulation program to determine energy resolutions of such calorimeter with different beam energies and calorimeter sizes.

Differentiating Bending From Folding in Origami Engineering Using Active Materials

2014 ◽  
Author(s):  
Carlye Lauff ◽  
Timothy W. Simpson ◽  
Mary Frecker ◽  
Zoubeida Ounaies ◽  
Saad Ahmed ◽  
...  
Keyword(s):  
Finite Thickness ◽  
Material Behavior ◽  
Dielectric Elastomers ◽  
Engineering Applications ◽  
Active Materials ◽  
On Demand ◽  
Materials Used ◽  
Strength And Stiffness ◽  
Origami Engineering ◽  
The Way

Origami engineering — the use of origami principles in engineering applications — provides numerous opportunities to revolutionize the way we design, manufacture, assemble, and package products and devices. By combining origami principles with active materials, we can create reconfigurable products and devices that can fold and unfold on demand. In origami, the folded medium is paper, yet many engineering applications require materials with finite thickness to provide the necessary strength and stiffness to achieve the desired functionality. In such applications, it is important to distinguish between bending and folding so that we understand the differences in material behavior when actuated. In this paper, we propose definitions for bending and folding for materials used in engineering applications. The literature is reviewed in detail to provide context and support for the proposed definitions, and examples from our own research with active materials, specifically, magneto-active elastomers (MAE) and dielectric elastomers (DE), are used to illustrate the subtle, yet important, differences between bending and folding in materials with finite thickness.

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