This paper focuses on reporting results obtained by the spark plasma sintering (SPS) consolidation and characterization of aluminum-based nanocomposites reinforced with concentrations 0.5 wt%, 1 wt% 2 single-walled carbon nanotubes (SWCNTs) multi-walled (MWCNTs). Experimental performed SEM shows uniform nanotube (CNT) dispersion as well clusters located in grain boundary Al matrix. The structural analysis crystallite size calculation were X-ray diffraction tests, detecting characteristic CNT...

Electrocatalysts with constant metallic composition, consisting of carbon-supported platinum and molybdenum phases, were synthesized following the thermolysis (thr) borohydride (bhr) reduction methods using different precursors. The obtained electrocatalysts characterized by X-ray energy-dispersive spectrometry, diffraction high resolution transmission electron microscopy. Their activities studied cyclic voltammetry. Different surface structures electrochemical toward methanol oxidation...

The evolution of dendrite formation is characterized by DC and AC electrochemical techniques. Interfacial mechanisms for lithium deposition are described quantified impedance spectroscopy (EIS) between a electrode graphite electrode. initiation growth dendrites in the surface due to cathodic polarization conditions following anodic dissolution emulate long term cycling process occurring electrodes. at lithium/organic electrolyte interface proposed be performed through combination layering...

This article focuses on exploring how the electrical conductivity and densification properties of metallic samples made from aluminum (Al) powders reinforced with 0.5 wt % concentration multi-walled carbon nanotubes (MWCNTs) consolidated through spark plasma sintering (SPS) process are affected by dispersion Al particles morphology. Experimental characterization tests performed scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS) show that MWCNTs were uniformly ball-milled...

The aim of this project is to compare two types mechanical plating, Ag and Sn, applied rotatory electrical joints used in Molded Case Circuit Breaker (MCCB) devices. coated component made by a sintered Copper connection between the Thermo Magnetic Trip Unit blade, also Cu, where circuit closed device. Both coatings were evaluated following several sequences described UL 489 standard. performance under similar conditions one most relevant terms measured temperature, without appreciable...

This article explores the industrial application of an Al-based nanocomposite reinforced with 0.5 wt.% multiwalled carbon nanotubes a Zn mechanical plating applied to fulfill field requirements electrical devices. The performance electric devices made from this material and was compared that MCCB using normal Cu compound. nanocomposites compound showed better performance, less heat generated due flow charge passing through device. presence MWCNTs in Al dissipates heat, maintaining stable...

The aim of this project is the use Aluminum material as alternative in thermomagnetic trip units (TMTU) instead Copper. This has showed similar performance comparison with common used for application. mechanical and physical properties both materials were evaluated to establish specific alloy which could accomplish target Thermo-electrical analysis simulations made ANSYS software shows a between Cu CDA 260 Al 5052, difference around 2.5~2.9% measured temperature during thermo-electrical...

The aim of this paper focuses on presenting a recent study that describes the fundamental steps needed to effectively scale-up from lab mass production parts produced Al powders reinforced with 0.5 wt% industrial multiwalled carbon nanotubes (MWCNTs), mechanical and electrical conductivity properties higher those measured at scale. material samples were via Spark Plasma Sintering (SPS) process using nanocomposite aluminum elaborated planetary ball-mill scale, high-volume attrition milling...

The Li-S batteries has pronounced as an excellent alternative in Li batteries, mainly due to its high theoretical specific capacity and energy density. However, the practical application of rechargeable Li/S several problems low utilization active material efficiency during charge discharge cycles. This work proposes use different binder (PVDF, Chitosan Nafion), with a MWCNT/S composite material, order improve electrochemical behavior, increases on electronic conductivity between MWCNT S,...

The Li- S batteries has pronounced as an excellent alternative in Li batteries, mainly due to its high theoretical specific capacity and energy density. However, the practical application of rechargeable Li/S several problems low utilization active material efficiency during charge discharge cycles. This work proposes use MWCNT support for this type batteries. Among advantages offered by like more area, there is prevention dissolution polisufides with long chain, which can cause passivation...

Abstract not Available.

The aim of this project is to evaluate a novel design in arc chamber for MCCB. This proposed focused on the movement generated gas at open arcing contact event during circuit breaker operation. Normally, should cool formed break operation and divide smaller ones, combined with due magnetic forces. current allows cooling by movement, but having risk re-ignition because conductive particles interact plasma. includes variation space between splitting metal plates chamber, an unequal it,...

This paper focuses on the optimized design of a one-piece arc chamber based fiberglass stack that is commonly used in industrial circuit breakers. The current an arrangement plates fan pattern shape stacked with walls and, new uses thermoplastic injected housing parallel for metal plates, additional benefit by reducing number plates. A dynamic simulation was performed to represent on-off movement blade define important parameters extinguish electric as plate distance and orientation. Thought...

This article shows the evaluation of a new Cu-base metal contacts applied to low voltage circuit breakers. The general performance developed material was similar one obtained with common Ag-base used in this type devices and conditions. contact tested under UL 489 standard temperature rise test at difference around 9°C between both materials steady state conditions; endurance short don't show evident differences contacts. SEM images exhibit how is homogenous dispersion alloying elements Cu...

This article presents the effects of welding electrode geometries during resistance spot welding. The optimized geometry creates best results for copper braids into alloy substrates by reducing defects generated on joints. new can benefit multiple applications, where lower energy is needed to join parts. A mechanical cycling test was conducted validate joint produced geometry. microstructure showed that improves properties weld changing distribution heat affected zone and consequence,...