Sintering oxide ceramics based on AI2O3 and ZrO2, activated by MgO, TiO2 and SiO2 additives

The positive effect of the addition of MgO and TiO2 in an amount of no more than 1 wt. % on sintering and physico-mechanical properties of alumina ceramics is established. Addition of 5% of SiO2 to A12O3 provides the mechanism of liquid phase sintering of ceramics, which leads to increase in its den...

Full description

Saved in:
Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2016-11, Vol.156 (1)
Main Authors: Matrenin, S V, Zenin, B S, Tayukin, R V
Format: Article
Language:English
Subjects:
Activated sintering
Additives
Aluminum oxide
Ceramics
Composition
Dispersion hardening
Dispersion strengthening
Liquid phase sintering
Liquid phases
Magnesium oxide
Mechanical properties
Physical properties
Silicon dioxide
Sintering
Titanium dioxide
Yttrium oxide
Zirconium dioxide
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The positive effect of the addition of MgO and TiO2 in an amount of no more than 1 wt. % on sintering and physico-mechanical properties of alumina ceramics is established. Addition of 5% of SiO2 to A12O3 provides the mechanism of liquid phase sintering of ceramics, which leads to increase in its density and strength up to 480 MPa. In ceramic system A12O3 - ZrO2 - Y2O3 highest level of physical and mechanical properties of the composition had a hypereutectic composition 16.6% A12O3 - 76% Z1O2 - 7.4% Y2O3. In this composition two mechanisms of hardening are realized simultaneously, such as transformational hardening by t- m - ZrO2 transition and dispersion strengthening with high-modulus particles of α- A12O3.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/156/1/012034