Materials Literature
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فولاد 100-HSLA فولادی نسبتاً جدید است که به دلیل استحکام بالا و چقرمگی دما پایین، کاربرد های فراوانی در محیط های دریایی دارد. در این مطالعه اثر میزان فلاکس های اکسیدی بر هندسه جوش، ولتاژ قوس و ریزسختی مناطق مختلف جوش ورق فولادی 100-HSLA با ضخامت 4/5 میلیمتر مورد بررسی قرار گرفت. در ابتدا فلاکس های اکسیدی 2SiO و 2TiO د…
در این تحقیق، یک فرایند دو مرحلهای برای بازیابی روی از غبار کورهی قوس الکتریکی به کمک کربن و فروسیلیسیم ارائه شده است. نتایج نشان میدهد که جایگزینی کربن با مقدار کافی از سیلیسیم باعث تشکیل سرباره مذاب شده و نرخ احیاء را تا سه برابر افزایش داده است. نتـــایج همچنین نشان میدهد دمای موضعی نمونهها در اثر انجام واکنش…
Piezoelectric stack actuators are a type of excellent smart devices that can activate large power and displacement outputs due to their unique stack configuration and have been widely used in linear vibrators for various engineering applications. For the fabricated piezoelectric stack actuator, it usually consists of…
Multi-colored polymer lasers Highly luminescent polymers can work as lasers when incorporated with suitable cavities and now the nano-imprinting makes the fabrication much cheaper and more scalable. An international team led by Prof Juan Cabanillas-Gonzalez from Madrid Institute for Advanced Studies in Nanoscience, Sp…
Nickel–Cobalt oxide nanotubes are prepared by a simple electrospinning technique based on a phase-separation mechanism. Extra tetraethyl orthosilicate (Si(OC2H5)4) is introduced and removed by design to obtain nanotube structure. The prepared nanotubes deliver remarkable electrochemical performance as the lithium-ion…
Civil construction is one segment responsible for major environmental and social impacts. Among its raw materials, Portland cement, which is produced by the burning and subsequent grinding of a composition of clays and limestones. This manufacturing process causes great environmental damage, both by the exploitation o…
In this research, the effect of temperature on the mean size of fracture surface features, as well as the relation between fracture surface morphologies and ductility of a La-based BMG as a relatively brittle alloy, was systematically investigated. After producing the alloy, three-point bending experiments, over a wid…
Two-dimensional spectral response distribution maps in dye-sensitized solar cells (DSSC) are reported using 1 × 1 mm pixels for 0.5 × 2 cm DSSC devices by coupling external quantum efficiency (EQE) measurements with an X-Y scanning stage. The technique has been applied to singly dyed (D149 and N719) and co-sensitized…
In modern times, the design and optimization of different actuator systems for controlling a high-precision position control system represent a popular interdisciplinary research area. Initially, only single-stage actuator systems were used to control most of the motion control applications. Currently, dual-stage actu…
The electrochemical behavior of paracetamol (PA) and dopamine (DA) has been investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and square wave voltammetry (SWV) using a selective and sensitive iron oxide (Fe2O3) nanoparticle modified carbon paste electrode (IOCPE). The PA and DA showed an an…
Tetracycline is used to treat various diseases in animals and humans, so its high use causes this substance to be frequently found in effluents and in potable water reservoirs, causing serious problems for human health and the environment. Many processes are applied and evaluated in an attempt to removal tetracycline…
In this article, a brief overview of manganese oxide nanomaterials (NMs) potential towards oxygen reduction reaction (ORR) for microbial fuel cell (MFC), bioremediations, and battery applications is discussed. It's known that using non-renewable fossil fuels as a direct energy source causes greenhouse gas emissions. S…
For concrete used in dry cask nuclear storage, gamma radiation on the order of MGy is an important weathering mechanism. At such doses, previous studies have observed microstructural effects such as changes in carbonate speciation, which have correlated with a decrease in bulk porosity. However, the mass, dimensions,…
The study investigated the joint effect of freeze–thaw attack and ultraviolet (UV) radiation on concrete. Mass loss ratio, relative dynamic modulus of elasticity (RDME) and flexural strength of concrete were experimentally investigated. A two-way ANOVA was used to analyse the effect of UV radiation on the test results…
Silicon (Si) has long been regarded as one of the most promising anode materials for the next-generation lithium-ion batteries (LIBs) due to its exceptional specific capacity and apt working voltage. However, the drastic volume change of Si during lithiation/delithiation processes tends to cause various mechanical fai…
در این مطالعه، پودر کلسیم هگزا بوراید (CaB6) از طریق سنتز احتراقی تهیه و خاصیت آنتی اکسیدانی آن بررسی شد. الگوهای پراش اشعه ایکس محصولات به دست آمده از فرآیند سنتز احتراقی بعد از شستشو با عوامل شیمیایی مناسب که در آن منیزیم به عنوان عامل احیا کننده استفاده شده بود فقط حضور کلسیم هگزابوراید را نشان دادند، در حالی که وق…
برای بررسی خواص اکسیداسیونی پوشش کامپوزیتی سد حرارتیYSZ به همراه Al2O3/YAG ابتدا پودر Al2O3/YAG به روش سل-ژل تولید شد. 30٬15 و45 درصد وزنی از Al2O3/YAGبا YSZ ترکیب شدند کهYS85 ٬YS70وYS55 نامیده شدند. پوشش های کامپوزیتی روی لایه زیرین IN738-LC با پاشش پلاسما اعمال شدند. با بررسی آزمایش اکسیداسیون چرخه ای در دمای 1050 د…
جوش بدون درزی بر روی ورق 2 میلیمتری فولاد زنگنزن فریتی 430 با فرایند جوشکاری همزن اصطکاکی با سرعت چرخشی 400 دور بر دقیقه و سرعت پیشروی 50 میلیمتر بر دقیقه ایجاد گردید. مشاهدات ریزساختاری نشان داد که در ناحیه ریزساختاری متاثر از عملیات ترمومکانیکی جوش در اثر وقوع مکانیزم بازیابی دینامیکی کسر بزرگی از مرزدانههای کوچک…
In this research, some metal sulfide nanoparticles (NPs) including ZnS, CdS and CuS NPs were prepared by a simple and low-cost co-precipitation method for the photocatalytic degradation of Bromothymol blue dye (BTB) under natural sunlight irradiation. The synthesized materials were characterized by XRD, FT-IR, UV-vis…
Heat generation in linear friction welding of Ti alloy was modelled with a computationally efficient finite element analysis. This was achieved by using multiple small strain analyses during one quarter cycle of workpiece oscillation, giving a snapshot of the average heat dissipation rate in a single complete cycle. T…