Oxidation and carbidation of laser-ablated amorphized Ti particles in carbon monoxide

IR and near IR laser ablative deposition of amorphous titanium coats containing nanocrystalline grains of titanium and titanium suboxides

“…This is very different from the amorphous-like Ti phases observed at high pressures and temperatures which rapidly revert to the crystalline phase upon cooling to room temperature [8]. The base pressure during the present ablative conditions being by 2 orders of magnitude lower than in our previous experiments [31] should lead to a much smaller in situ formation of Ti suboxides due to less air leakage in the course of the ablative deposition process. The observed EDX-derived O content in the lm-sized bodies, which primarily corresponds to nanocrystalline TiO x , is therefore just a few atomic per cent of the deposited Ti.…”

“…The observed EDX-derived O content in the lm-sized bodies, which primarily corresponds to nanocrystalline TiO x , is therefore just a few atomic per cent of the deposited Ti. However, it is considerably higher in the deposited smooth environment, indicating that this thin environment is much influenced by the known fast oxidation of titanium to titania [31] in ambient air [38].…”

“…We reveal that the deposited coats are amorphous and incorporate scarce nanograins of hexagonal Ti and Ti suboxides and that they modify their morphology upon annealing to 900°C. The paper is an extension of our previous work on the laser ablation of Ti in carbon monoxide [31] and it suggests that the laser ablative deposition technique may find future use in the fabrication of thermally stable amorphous titanium coats incorporating low amounts of nanocrystalline Ti and TiO x grains.…”

Reactive deposition of laser ablated FeS1−xparticles on a copper surface

“…[15][16][17], and by laser ablation of bulk elemental solids in the presence of a reactive gas (e.g. oxygen, [18][19][20][21] nitrogen, [22][23][24] carbon monoxide, [25][26][27] hydrocarbon, 28,29 or hydrogen sulde 30 ). All these processes are called reactive laser ablation and yield (in the given order) mixed clusters and nanosized products (e.g.…”