Microstructural numerical modeling of Al 2 O 3 /Ti composite

Electrodeposited Co – Ni – Al O composite coatings 2 3

Composite coatings of Co–Ni–Al O were studied by electrolytic codeposition of Co–Ni alloys and Al O from a sulfamate 2 3 2 3 electrolyte containing Al O particles. The influence of plating parameters on the content of the co-deposited Al O particles in 2 3 2 3 Co–Ni alloys was investigated. The maximum value of co-deposited Al O can be achieved at a particle content of 80 g l in y1 2 3 bath, a ...

Shallow implantation of Ti ions in sapphire [ a - Al 2 O 3 ( 0 0 0 1 ) ]

Sapphire single crystal [a-Al2O3(0 0 0 1)] samples were treated by irradiation with Ti‡ ions in the energy range 0.5±7.0 keV at 25°C and 750°C under UHV conditions for total doses of 10 Ti‡/cm2. These Ti treated sapphire samples were studied by ex situ X-ray photoelectron spectroscopy (XPS) depth pro®ling and by atomic force microscopy (AFM). Aluminum in the oxidation states Al0;3‡;x‡, where 0 ...

Part I. The Microstructural Evolution in Ti-Al-Nb O 1 Bcc Orthorhombic Alloys

Phase transformations and the resulting microstructural evolution of near-Ti2AlNb and Ti-12Al38Nb O 1 bcc orthorhombic alloys were investigated. For the near-Ti2AlNb alloys, the processing temperatures were below the bcc transus, while, for Ti-12Al-38Nb, the processing temperature was supertransus. Phase evolution studies showed that these alloys contain several constituent phases, namely, bcc,...

Upconversion spectroscopy of Al 2 O 3 : Er 3 +

The spectroscopic properties of Al2O3:Er thin films have been investigated by lifetime measurements. The luminescence decay curves show an initial non-exponential component, followed by an exponential tail, whose decay time decreases with increasing Er concentration. This behavior can be described with good accuracy by a microscopic treatment that takes into account both energy migration and en...

Electronic structure investigation of Ti 3 AlC 2 , Ti 3 SiC 2 , and Ti 3 GeC