?-phase aluminum oxide (?-Al2O3) films are grown on MgO (100) wafers by metal organic chemical vapor deposition (MOCVD). Post-annealing process is conducted to study the influence of annealing temperature properties films. Structural analyses indicate that all deposited and annealed present a preferred growth orientation ?-Al2O3 (220) along (200) direction. And film at 1100 °C exhibits best qua...

In an attempt to provide a more flexible means of achieving friction stir welding (FSW) Aluminum without the use expensive FSW machine tool, which are not readily available, this study developed mobile fixture system (MFS) for on Vertical milling Machine Tool (VMMT) and Pillar drilling (PDMT). A conceptual design with moving work table, provides transverse feed (movement) workpieces during FSW,...

Electrodeposited aluminum films and template-synthesized aluminum nanorods are examined as negative electrodes for lithium-ion batteries. The lithium-aluminum alloying reaction is observed electrochemically with cyclic voltammetry and galvanostatic cycling in lithium half-cells. The electrodeposition reaction is shown to have high faradaic efficiency, and electrodeposited aluminum films reach t...

Epitaxial lateral overgrowth in tandem with the first-principles calculation was employed to investigate the determining factor of a preferred orientation of GaN on SiO2-patterned m-plane sapphire substrates. We found that the (1100)-orientation is favored over the (1103)-orientation in the region with a small filling factor of SiO2, while the latter orientation becomes preferred in the region ...

Micro friction stir welding (μFSW) adalah pengelasan untuk ketebalan maksimal 1 mm. Tujuan penelitian mengetahui pengaruh feed rate dan sudut kemiringan pin tool pada μFSW aluminium 1100. Pengelasan dilakukan dengan variasi 0°,1° 2°, 66, 85, 120 mm/menit serta kecepatan putaran 2280 rpm. Jenis sambungan yang digunakan butt. Pengujian pengujian struktur mikro cacat makro mikroskop optik, uji kek...

BACKGROUND Aluminum is considered to be a relatively safe metal for humans. However, there are some reports that aluminum can be toxic to humans and animals. In order to estimate the toxicity of aluminum with respect to humans, we measured the aluminum concentration in urine of aluminum-handling and non-handling workers and investigated the relationships between their urinary aluminum concentra...

Single-phase cerium aluminate was synthesized from mixtures of ceria and metallic aluminum by milling firing under controlled conditions in reducing (10%H2 + 90%N2) or inert atmospheres (N2 CO2). Firing an atmosphere (CO2) did not yield conversion to aluminate, also low after only improved slightly on changing powder with coarse Al (15 µm) submicron (0.77 µm). High-energy promoted reactivity th...