Akademik Veri Yönetim Sistemi
1nd. Global Conference on Engineering Research (GLOBCER'21), Balıkesir, Türkiye, 2 - 05 Haziran 2021, ss.673-682
In this study, Mullite (3Al2O3.2SiO2) and 10 mol% Alumina doped zirconia (Al2O3-
ZrO2) ceramic powders were synthesized by conventional ceramic production processing route.
The mixtures were prepared by mechanical alloying method in acetone environment with zirconia
ball mill. The powders were dried in oven at 110 ºC for 24 hours before mixing. Mullite
(3Al2O3.2SiO2) and 10 mol% Alumina doped zirconia (Al2O3-ZrO2) ceramic powders were
synthesized by reaction sintering from the powders made up of stoichiometric proportions of
Al2O3, SiO2 and ZrO2 powders after being homogenized in acetone environment in ball mills.
Mullite (3Al2O3.2SiO2) and 10 mol% Alumina doped zirconia (Al2O3-ZrO2) ceramic powders
were synthesized in air at 1600 oC and 1300 oC for 2 h, respectively. Then, the ceramic phases
formed were made ready to form ceramic - ceramic composites by crushing, grinding and sieving
processes. Then 0 and 10% by weight mullite (M) added alumina doped zirconia (AlZ) mixtures
were prepared by powder metallurgy method. The prepared mixtures were wet milled with zirconia
ball mill for 24 h and sieved. After drying, the powders were compacted to preforms of 56x12x10
mm by uniaxial pressing at 200 MPa. The green compacts were sintered at 1500-1600 oC for 1-5
h in air conditions using a heating rate of 5 oC min-1 in a high temperature furnace. Then,
microstructure (SEM), phase analysis (XRD), mechanical (hardness, 3-point bending and wear)
and physical properties (% shrinkage, water absorption, porosity and density) tests were performed
on the mullite added alumina doped zirconia ceramic composites. Whether there is a phase change
in the ZrO2-Al2O3 mixture at high sintering temperatures and the effect of mullite additive on the
properties of this mixture was investigated. Finally, the data obtained were presented in graphs
and tables and results were commented.