nano-sized γ-al2o3 was synthesized successfully by a simple method using al2(so4)3·18h2o as aluminium source and in the presence of polyethylene glycol (peg 2000). ftir spectroscopy, x-ray diffraction (xrd), scanning electron microscope (sem) and transmission electron microscope (tem) were used to characterize the structure and morphology of synthesized powder. the results showed that peg playe...

Two differently-produced open-cell aluminum foams were compared to a commercially available finned heat sink. Further, an aluminum plate and block were tested as a reference. All heat sinks have the same base plate dimensions of four by six inches. The first foam was made by investment casting of a polyurethane preform and has a porosity of 0.946 and a pore density of 10 pores per linear inch. ...

Abstract Investment casting has long been known as a process that can produce complex parts with fine details. However, it not used widely for need to be anodized and whose nonuniform color is affected by the type of cast aluminum. Although 6063 aluminum in anodizing decoration purposes, almost entirely wrought. Some studies have aluminum, but no investment reported. The objective this work dev...

The aim of this study was to evaluate the effect heat treatment on phase composition, hardness, and abrasion wear resistance hard-anodized layers (HAL) 1011 aluminum alloy. X-ray diffraction analysis revealed Al2O3·3H2O in structure HAL synthesized for 1 h. While heat-treated HAL, oxide phases α-Al2O3(amorphous) γ-Al2O3(amorphous) types were found. Treatment at 400 °C h increased microhardness ...

The main interface and interconnection materials normally used in complementary metal-oxide semiconductor (CMOS) integrated circuit processing, i.e. silicon oxides and aluminum, were evaluated with regards to deoxyribonucleic acid (DNA) attachment. We investigated and quantified the influence of various techniques of fabrication of the silicon oxide on DNA binding obtained by four different bio...

Fe49Co33Ni18 nanowire arrays (175 nm in diameter and lengths ranging from 5 to 32μm) were fabricated into nanopores of hard-anodized aluminum oxide templates using pulsed ac electrodeposition technique. Hysteresis loop measurements indicated that increasing the length decreases coercivity and squareness values (from 274 Oe and 0.58 to200 Oe and 0.105, respective...