Effect of Surface Impurities on the Microstructure Development during Sintering of Alumina

Microstructural evolution during sintering of alumina powder compacts prepared by cold isostatic pressing (CIP) was monitored. For CIP, rubber molds lubricated with silicone oil were used so that a very small amount of impurity was introduced to the surface of the powder compacts. During sintering a...

Full description

Saved in:
Bibliographic Details
Published inJournal of the American Ceramic Society Vol. 84; no. 6; pp. 1386 - 1388
Main Authors Sone, Tae-Wook, Han, Joo-Hwan, Hong, Seong-Hyeon, Kim, Doh-Yeon
Format Journal Article
LanguageEnglish
Published Westerville, Ohio American Ceramics Society 01.06.2001
Blackwell
Wiley Subscription Services, Inc
Subjects
alumina
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
microstructure
Miscellaneous
sinter/sintering
Technical ceramics
Impurity effect
Sintering
Isostatic pressing
Manufacturing
Experimental study
Microstructure
Alumina
Oxide ceramics
Online AccessGet full text

Cover

More Information
Summary:Microstructural evolution during sintering of alumina powder compacts prepared by cold isostatic pressing (CIP) was monitored. For CIP, rubber molds lubricated with silicone oil were used so that a very small amount of impurity was introduced to the surface of the powder compacts. During sintering at 1600°C, grain growth in the surface region was inhibited up to sintering for 1 h, but subsequently abnormal grain growth occurred. In the inner region, however, the grains grew uniformly without abnormal grain growth. Impurities that initially drag the boundary migration but form liquid at the end are suggested to cause abnormal grain growth.
Bibliography:istex:E39BABBD029B48BE267B60DC4DB8B1DF207DD3CE
ArticleID:JACE1386
ark:/67375/WNG-9D1T95MZ-S
Supported by the Yeungnam University (Research Grants of 2000) and the Ministry of Science and Technology of the Korean Government through Creative Research Initiatives.
Member, American Ceramic Society.
M. P. Harmer—contributing editor
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.2001.tb00846.x