Formation of the high-temperature ?-Al2O3 phase during Plasma Electrolytic Oxidation aluminium at ambient bulk temperatures has been previously attributed to local microdischarge events providing multiple melting-solidification cycles in micro-volumes surface oxide layer. In this work, it is demonstrated that ? can be formed even if fully suppressed under specific processing conditions. Oxide l...

The dielectric properties of aluminium oxide (Al2O3) thin films obtained by plasma-enhanced atomic layer deposition (PEALD) from Al(CH3)3/O2 precursors were investigated while focusing on the influences thermal annealing under a dioxygen (O2) ambient. PEALD-Al2O3-based metal-insulator-silicon structures/capacitors and pH-sensitive chemical field effect transistors fabricated to deal respectivel...

This work explores the possibility of involving aluminothermy in processing donor-doped zinc oxide-based thermoelectrics by relying on local, strong exothermic effects developed during sintering, with a potential positive impact electrical and thermal transport properties. The strategy was exemplified using aluminium as dopant, due to its recognized ability generate additional, available charge...

The purpose of this study is to follow-up the distribution, lethality percentile doses (LDs) and bioaccumulation of aluminium oxide nanoparticles (Al2O3-NPs, average diameter 9.83 ± 1.61 nm) in some tissues of male albino rats, and to evaluate its genotoxicity to the brain tissues, during acute and sublethal experiments. The LDs of Al2O3-NPs, including median lethal dose (LD50), were estimated ...

The building sector is targeting net-zero emissions through the integration of renewable energy technologies, especially for space cooling and heating applications. In this regard, use solar thermal concentrating collectors vital importance. performance these increases by using an efficient fluid such as a nanofluid due to their high conductivity. This research addresses preparation, stability ...

The evolution of internal stresses in oxide scales growing on an Fe3Al polycrystal in atmospheric air at 700 determined using in-situ energy-dispersive synchrotron x-ray diffraction. Texture analyses were performed ex-situ after 5h of oxidation at 700 the oxide scale thickness, as determined by x-ray photoelectron spectroscopy, lays between 80 and 100nm. The main phase present in the oxide scal...

We present the results of a plane wave based density functional study of the structure and properties of tetragonal zirconia in the range of pressures from 0 to 50 GPa. We predict a transition to a fluorite-type cubic structure at 37 GPa which is likely to be of a soft mode origin and is accompanied by a power law decrease of the frequency of the Raman-active A(1g) mode. A detailed study of the...

Light-weight ferro-aluminium alloys are finding increasing application in the transport sector to reduce overall weights, energy costs and CO2 emissions. As the primary production processes of both Fe and Al are among the most energy-intensive industrial processes in the world, there is an urgent need to develop alternate routes for producing Fe-Al alloys. Our group has successfully produced th...

A systematic capacitance-voltage study has been performed on GaAs metal-oxide-semiconductor MOS structures with atomic-layer-deposited HfO2/Al2O3 nanolaminates as gate dielectrics. A HfO2/Al2O3 nanolaminate gate dielectric improves the GaAs MOS characteristics such as dielectric constant, breakdown voltage, and frequency dispersion. A possible origin for the widely observed larger frequency dis...