Phase stability and microstructure evolution of yttria-stabilized zirconia during firing in a reducing atmosphere

The phase transition and microstructure evolution of yttria-stabilized zirconia (YSZ) when firing in a reducing atmosphere are investigated in the present study. As the sintering temperature is lower than 1400°C, the phase observed for the YSZ specimens is the first tetragonal (t) phase with a grain...

Full description

Saved in:
Bibliographic Details
Published inCeramics international Vol. 37; no. 4; pp. 1401 - 1407
Main Authors Ho, Chang-Ju, Tuan, Wei-Hsing
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.05.2011
Subjects
A. Grain growth
Evolution
Firing
Grains
Microstructure
Nickel
Phase transformation
Phase transformations
Reducing atmosphere
Reducing atmospheres
Sintering
Yttria stabilized zirconia
Zirconia
Zirconia
Reducing atmosphere
Phase transformation
A. Grain growth
Online AccessGet full text

Cover

More Information
Summary:The phase transition and microstructure evolution of yttria-stabilized zirconia (YSZ) when firing in a reducing atmosphere are investigated in the present study. As the sintering temperature is lower than 1400°C, the phase observed for the YSZ specimens is the first tetragonal (t) phase with a grain size of only 0.4μm in average. When the sintering temperature is increased above 1450°C, the second tetragonal (t′) phase appears together with a rapid grain growth rate. A surface layer with grains larger than 20μm is observed for the YSZ specimens sintered at 1600°C. It is found that the addition of metallic nickel particles has little influence on the phase transition of YSZ; however, the growth of t′-phase grains is reduced with the addition of Ni particles.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2011.01.008