HIGH-TEMPERATURE DEFORMATION OF FINE-GRAINED YTTRIA-STABILIZED ZIRCONIA REINFORCED WITH AL2O3 PLATELETS

Authors
ANDRADES L BRAVOLEON A JIMENEZMELENDO M DOMINGUEZRODRIGUEZ A
Citation
L. Andrades et al., HIGH-TEMPERATURE DEFORMATION OF FINE-GRAINED YTTRIA-STABILIZED ZIRCONIA REINFORCED WITH AL2O3 PLATELETS, Journal de physique. III, 5(11), 1995, pp. 1841-1847
Citations number
18
Categorie Soggetti
Material Science","Phsycs, Fluid & Plasmas","Physics, Applied
Journal title
Journal de physique. III → ACNP
ISSN journal
11554320
Volume
5
Issue
11
Year of publication
1995
Pages
1841 - 1847
Database
ISI
SICI code
1155-4320(1995)5:11<1841:HDOFYZ>2.0.ZU;2-I
Abstract
3 mol% Y2O3-stabilized Tetragonal Zirconia Polycrystals (Y-TZP) reinfo rced with 15% vol. Al2O3 platelets have been deformed in compression a t constant strain rates between 10(-5) and 2 x 10(-3) s(-1) and temper atures between 1250 and 1400 degrees C. The composites have been found to behave in a similar way to monolithic Y-TZP. The strain rate contr olling mechanism is characterized by a stress exponent n of 2, the def ormation being achieved by grain boundary sliding. No increase in the creep resistance due to platelet-reinforcement was found because of th e high ductility of the zirconia matrix.