One of the crucial factors in improving optical device performance is decreasing reflection, and enhancing light absorption or transmission from wide angles of incidence in a broad wavelength range. In this regard, efficient anti-reflective surfaces demonstrating multifunctional capabilities and showing prospective quasi-omnidirectional anti-reflective and broadband properties are proposed. The selection of a suitable coating material is a key factor in reducing reflection on these surfaces. Hence, this review aims to outline the inception of durable and inexpensive ARC materials that can be applied in different electronic and optical equipment, based on its original conceptualization. Strategies to reduce reflectance will be discussed, and various forms of ARC investigated, paying attention to layer composition and surface topography. To conclude, among all available ARC materials, a 2D rectangular grating for light absorption on GaSb surfaces showed superior properties.
Corrosion of carbon steel in CO2 saturated NaCl solution contains the formation of FeCO3, as a corrosion product. The protective property of the formed FeCO3 scale layer to corrosion in brine solutions containing CO2 was established as the possible cause of the corrosion rate decrease above 60 °C. In this study, formation of nanoscale FeCO3 film as a corrosion product of X52 carbon steel in CO2-Saturated 3% NaCl solution was investigated. Result showed that corrosion rate decreased after precipitation and formation of protective FeCO3 film in high temperature and high bulk solution pH.
The effect of forming parameters during the incremental sheet forming process (ISF) was studied for a circular shape sheet part. ISF is known as a rapid prototyping method to pro-duce sheet metal parts in a batch production series. ISF has found to be useful and advantageous which increases its application in industry. A CNC lathe machine was used in this study because it was easily programmed to move an indenter which worked as the tool, through the sheet metal which was clamped on a plain rounded mold. The work also investigated the influence of some process variables such as spindle speed, tool material; tool feed rate and temperature during the forming procedure. The results showed that a proper spindle speed and tool feed rate at some stage in the forming process improved the surface quality and the rate of penetration.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.