Friction and very high temperature are still the major challenges in hard machining technology they greatly affect cutting efficiency. The application of MQL (minimum quantity lubrication) method, using nanoparticles order to improve cooling lubrication performance base oil, has proven be a promising solution. Hence, this work aimed investigate effectiveness Al2O3/MoS2 hybrid nanofluid Al2O3 Mo...

The use of composites has increased exponentially in most industries, especially the aerospace industry; usage by almost 40% last 15 years. Aerospace components are often subject to high-impact loads, so it is important impact-resistant materials. Kevlar known for its resistance and commonly used as a fiber with various resins achieve desired properties. This paper mainly focuses on weaving bas...

Oil well drilling fluid rheology, lubricity, swelling, and loss control are all critical factors to take into account before beginning the hole's construction. Drilling fluids can be made smoother, more cost-effective, efficient by investigating evaluating effects of various nanoparticles including aluminum oxide (Al2O3) iron (Fe2O3) on their performance. A fluid's performance assessed comparin...

Cutting fluids can be used to cool workpieces at high cutting speeds and remove chips from zones. The effectiveness of may improved with the addition hybrid nanoparticle dispersion. This study evaluates an Al2O3-TiO2 as a fluid in turning operations. nano-cutting was prepared using one-step method computer numerical control (CNC) coolant concentrations up 4%. Utilizing air-assisted injected thr...

We have demonstrated a flexible resistive random access memory unit with trilayer structure by atomic layer deposition (ALD). The device unit is composed of Al2O3/HfO2/Al2O3-based functional stacks on TiN-coated Si substrate. The cross-sectional HRTEM image and XPS depth profile of Al2O3/HfO2/Al2O3 on TiN-coated Si confirm the existence of interfacial layers between trilayer structures of Al2O3...

Al2O3 doped Ba0.5Sr0.5TiO3 ~BST! thin films, with different Al2O3 contents, were deposited on ~100! LaAlO3 substrates by the pulsed laser deposition technique to develop agile thin films for tunable microwave device applications. The dielectric properties of Al2O3 doped BST films were determined with a nondestructive dual resonator near 7.7 GHz. We demonstrated that the Al2O3 doping plays a sig...

The current study experimentally examines the impact of coil pitch on heat transfer behavior and friction factor through helical coils for ?- Al2O3/Distilled water nanofluid turbulent flow. These tests were conducted with pitches 20, 35, 50 mm. nanoparticle volume fraction was 0.1%. nanoparticles in a 0.1% concentration increased rate compared to those distilled water. Increases also resulted g...

the main purpose of this study is to perform numerical simulation of nanofluids as the coolant in vver-440 fuel rod bundle. the fuel rod bundle contains 60 fuel rods with length of 960 mm and 4 spacer grids. in vver-440 fuel rod bundle the coolant fluid (water) is in high pressure and temperature condition. in the present thermo-hydraulic simulation, water-al2o3 nanofluids containing various vo...

In this study, a 3D computational fluid dynamics (CFD) study was conducted in ANSYS (FLUENT) to examine the thermal performance of an automotive radiator using conventional and hybrid coolant with Al2O3 nanoparticles (NPs) . A mixture pure water H2Oand ethylene glycol (EG) volumetric proportion , coupled volume fraction 1% - 4% at different inlet temperatures. The Reynolds number varied from 4 ...

Disperse fine equiaxed α-Al2O3 nanoparticles with narrow size distribution are important materials in nanotechnology and nanomaterials, but syntheses of disperse fine equiaxed α-Al2O3 nanoparticles usually result in fine γ-Al2O3 nanoparticles or large α-Al2O3 nanoparticles larger than 15 nm. α-Al2O3 has a higher surface energy than γ-Al2O3 and becomes thermodynamically not stable with respect t...