Tribological properties of nanoscale alumina–zirconia composites

Percolative mechanism of sliding wear in alumina/zirconia composites

“…Some authors have attributed the large wear rate values in pure 3Y-TZP 3,9,14 as a consequence of the thermal stresses induced by a gradient of temperature along the sample. In the case of Al 2 O 3 /3Y-TZP composites this model can not be applied due to the large thermal conductivity of the composite which is very close to that of alumina.…”

“…[1][2][3][4][5] It was found that the transition from a mild to a severe wear process in these composites can be shifted to more extreme operating conditions, for instance, higher loads and higher velocities. 4,6,7 The use of metastable zirconia particles as a reinforcing element improves wear resistance through the suppression of crack initiation and propagation due to the higher value of fracture toughness.…”

Microstructure and tribological properties of pulsed electric current sintered alumina–zirconia nanocomposites with different solid lubricants

“…Alumina can readily be used in such multiphase nanocomposite as it is relatively inexpensive material with exceptional hardness and thermal properties. When it contains Y-TZP, it exhibits good room temperature toughness and wear resistance [1,[15][16][17][18]. Furthermore, www.elsevier.com/locate/ceramint it is also favourable for elevated temperature applications, where sliding or reciprocal movement is of interest (bearings of turbine rotors, vane bushings, rolling bearings etc.…”

Preparation and characterization of alumina-zirconia composite material with different acid ratios by the sol-gel method

“…Several methods of preparing the alumina / zirconia powders and composites have been reported [5][6][7][8]. Solgel processing technology has been developed for the fabrication of high quality ceramic-based composites.…”