By varying the ratio of the constituents, compound films can exhibit a widely tunable range of physical properties. Atomic layer deposition ~ALD! techniques are based on sequential, self-limiting surface reactions and can grow compound films. In this study, ZnO/Al2O3 alloy films were prepared using ALD techniques. By adjusting the ALD pulse sequence, the ZnO/Al2O3 alloy film composition was var...

A write-once-read-many-times (WORM) memory device was realized based on the charging-controlled modulation in the current conduction of Al/Al-rich Al2O3/p-type Si diode. A large increase in the reverse current of the diode could be achieved with a negative charging voltage, e.g., charging at −25 V for 1 ms results in a current increase by about four orders. Memory states of the WORM device coul...

A study was performed to investigate the effect of increasing the Al or Al2O3 precursor content, above the stoichiometric amount, on the formation of β-sialon by pressureless sintering of Al, Si and Al2O3 powders in flowing nitrogen gas. The effect of adding Y2O3 or Fe to the precursor mixture, on the β-sialon formation, was also studied. The phase morphology and yield produced by the various c...

Thermal explosion mode of combustion synthesis was used to fabricate TiAl-Al2O3 and TiAl-Ti2AlC-Al2O3 composites from elemental powder mixtures of TiO2, Al and C and characterized by XRD and Scanning Electron Microscopy (SEM) coupled with Energy-Dispersive Spectroscopy (EDS). The experimental results showed that thermite reaction of Al with TiO2 caused TiAl-Al2O3 composite formation. By adding ...