EDM is a prominent non-traditional machining process, which is widely used for machining hard materials which is not possible byconventional processes. A very special aspect of this process is a surface modificationby material transfer from the tool electrode to the work-piece which is commonly known as electro discharge coating (EDC). In this work, electrode prepared with tungsten (W) and copp...

The breakdown behavior of a V-doped 4H silicon carbide photoconductive switch with transparent electrode under high electric field is studied. device triggered by laser pulse below the bandgap wavelength repetition rate 100 Hz. light peak-power reaches hundreds kW, and bias voltage increased from 10 to 20 kV. With accumulation number pulses, shows behavior. Through microscopic diagnosis damaged...

The cost of microalgae harvesting constitutes a heavy burden on the commercialization biofuel production. present study addressed this problem through economic and parametric comparison electrochemical using sacrificial electrode (aluminum) nonsacrificial (graphite). efficiency, power consumption, operation were collected as objective variables function applied current initial pH solution. resu...

One-dimensional (1D) carbon nanotubes (CNTs) and 2D single-atomic layer graphene have superior thermal, electrical, and mechanical properties. However, these nanomaterials exhibit poor out-of-plane properties due to the weak van der Waals interaction in the transverse direction between graphitic layers. Recent theoretical studies indicate that rationally designed 3D architectures could have des...

several laundry houses throughout tehran consume a large amount of water each day and discharge the resulting wastewater into septic tanks or municipal sewage system without any suitable pretreatment. this would result in severe contamination and other serious environmental issues. in the present study, performance of electrocoagulation/flotation process with aluminum and iron electrodes is com...

Ground water is highly important source of drinking water in Egypt. Some provinces suffer from high content of iron and manganese in ground water which threat human health. Different processes, such as electrochemical (EC), photo (UV), and combined photo-electrochemical (CPE) methods were used to attain both metals content to the level in accordance to reports of World Health Organization (WHO)...

Paper-based batteries are an alternative to traditional batteries due to their low cost, portability, and simplicity to operate. In the present work, we demonstrate an improved and inexpensive paper-based aluminum-air battery employing KOH as the electrolyte with sufficient energy to power small devices. The dimensions of the device, electrode size, and electrolyte concentration were optimized ...