The abrasive wear susceptibility of innovative ATZ type composites produced by sintering mix of zirconia powders with different chemical composition
Marek Grabowy, Kamil Wojteczko, Agnieszka Wojteczko, Piotr Dębiński, Sana Ahmad Almansour Le Huy Minh, Mirosław M. Bućko, Zbigniew Pędzich
Quarterly No. 1, 2020 pages 11-16
DOI:
keywords: zirconia, alumina, composites, zirconia toughened alumina, abrasive wear susceptibility
abstract Composites based on tetragonal zirconia polycrystals modified with corundum inclusions ATZ (alumina toughened zirconia), are one of the basic and more commonly used ceramic structural materials. They are used especially willingly as parts of devices and machinery working in both dry and wet wear conditions in the presence of hard abrasive particles intensifying wear processes. The mechanical properties of such composites, strength and fracture toughness mainly, strongly depend on their chemical and phase compositions as well as microstructure. The aim of the present work was to investigate an innovative type of ATZ material composed of a mixture of two ZrO2 powders with different chemical composition and a small addition (2.3 vol.%) of nanometric corundum powder. The proper composite materials additionally contained 10 or 20 vol.% commercially available corundum particles. Tests were carried out on the mentioned materials for abrasive wear susceptibility according to the ASTM Dry Sand Test and ASTM Miller Test, using silicon carbide particles as the abrasive medium. As a reference materials, typical TZP (tetragonal zirconia polycrystals) material prepared using commercial powder and ZTA (zirconia toughened alumina) material containing 5 vol.% zirconia dispersed in an alumina matrix were used. The obtained results allowed the usability of the individual composite materials to be verified under various operating conditions.