Plasma-sprayed nanostructured Al2O3/TiO2 powders and coatings

High-energy ball milling of Al2O3–TiO2 powders

“…Indeed, they are very promising materials due to their enhanced properties. In the case of Al 2 O 3 -TiO 2 coatings, they present superior properties like higher hardness and enhanced fracture toughness as compared to their counterparts containing microscale grains [1]. Our work, dedicated to this system, is part of the NAMAMET European program that deals with the manufacturing of nanocrystalline materials through metastability.…”

“…[1][2][3][4] and Al 2 O 3 -44 wt% TiO 2 that corresponds to the composition of the definite compound Al 2 TiO 5 .…”

A study of the influence of TiO2 addition in Al2O3 coatings sprayed by suspension plasma spray

“…Nanostructured ceramic coatings possess better mechanical properties, such as toughness and hardness, than conventional ceramics, as well as chemical resistance and yield stress due to a diminished grain size [1][2][3][4][5][6]. Nowadays, a bulk ceramic piece with a nanostructured microstructure can be produced by sintering nano-sized powders via fast routes (to prevent grain growth) such as microwave furnaces [7,8] or Spark Plasma Sintering techniques [9,10].…”

Enhancing superplasticity of ZrO2 (Y2O3)–Al2O3 composites prepared by spark plasma sintering of metastable powders

“…This way, cooling rates in the range of 10 3 -10 6 K/s may be obtained. Oxide composites that are characterized by a solubility gap at room temperature, such as Al 2 O 3 -TiO 2 [21] and ZrO 2 -Al 2 O 3 [22], were molten and mixed in the plasma and retain their mixed state during impact and solidification. During densification, the supersaturated solid solution had a thermodynamic driving force towards the stable phases, viz.…”