This study investigates the prediction model of compressive strength of self–compacting concrete (SCC) by utilizing soft computing techniques. The techniques consist of adaptive neuro–based fuzzy inference system (ANFIS), artificial neural network (ANN) and the hybrid of particle swarm optimization with passive congregation (PSOPC) and ANFIS called PSOPC–ANFIS. Their perf...

The purpose of this research is to investigate the mechanical and electrical properties of nano structured cordierite. Nano grain size powders were synthesized through mechanical activation by high-energy ball milling of the starting powders containing 34.86 wt% Al2O3, 51.36 wt% SiO2, and 13.78 wt% MgO. Samples were prepared by conventional and microwave sintering at 1390°C. SEM observations il...

High-resolution electron microscopy was employed to characterize the interface structure of a cast Al-Mg-Si-Bi-Pb aluminium(6262)-based composite reinforced by alpha alumina particles with a trace of beta alumina in order to investigate the behaviour of alloying elements in cast composites. Except for a few primary Mg2Si particles, few reaction products were detected at the interface of Al/alph...

In this study, the authors report the production of nanocomposite-enhanced phase-change materials (NEPCMs) using the direct-synthesis method by mixing paraffin with alumina (Al2O3), titania (TiO2), silica (SiO2), and zinc oxide (ZnO) as the experimental samples. Al2O3, TiO2, SiO2, and ZnO were dispersed into three concentrations of 1.0, 2.0, and 3.0 wt.%. Through heat conduction and differentia...

Although the concept of transparent, polycrystalline ceramics is now 40 years old, only recently has control of processing parameters been sufficient to produce photonic quality materials, Nd:YAG and Yb:Yttria lasers in particular. In all instances, average grain sizes (AGSs) in these fully dense materials are in the range 10–50 mm. Furthermore, photonic quality transparency has only been achie...

A typical structure of thermal spray coatings consisted molten particles, semi-molten oxides, pores, and cracks. These factors caused the porosity sprayed coatings, leading to a significant influence on coating properties, especially their wear-corrosion resistance. In this study, post-spray sealing treatment Cr3C2-NiCr/Al2O3-TiO2 plasma-sprayed was carried out, then, corrosion properties were ...

alumina is one of the most widely used ceramic materials as catalysts, catalyst supports and absorbents, and also wear resistant coating. this study focused on fabricating and characterizing of alumina ceramic nanoparticles fabricated using new and simple sol-gel method. aluminium oxide (al2o3) nanoparticles were synthesized by iron (iii) nitrate 9-hydrate as precursor. physicochemical properti...

Nano aluminum oxide was prepared by the combustion method using nitrate as oxidizer and urea a fuel. Characterization of synthesized materials performed SEM (scanning electron microscope), powder XRD (X-ray diffraction), FTIR (Fourier transform infrared spectroscopy), TEM (transmission microscope). Al-Mg/Al2O3 (2, 4, 6, 8 wt%) metal matrix nanocomposites were liquid metallurgy route-vertex tech...