In this paper, the plasma spray technique was used to deposit coatings with
reconstituted nanostructured Al2O3/TiO2 powders. The abrasive wear resista
nce of the ceramic coatings was evaluated using diamond abrasives. The resu
lt showed that the abrasive wear resistance of the coatings produced using
the nanostructured Al2O3/TiO2 powders is greatly improved compared with the
coating produced using the conventional Al2O3/TiO2 powder (Metco 130). The
highest: abrasion resistance of the coating sprayed with nanostructured Al
2O3/TiO2 powder is about four times that of the coating sprayed with the co
nventional Al2O3/TiO2 powder. Both as fabricated and after wear Al2O3/TiO2
coatings were investigated by X-ray diffraction, SEM and indentation tests.
The abrasive wear mechanism is also discussed. (C) 2000 Elsevier Science S
.A. All rights reserved.