Effects of aging on the phase transformation and sintering properties of coprecipitated Al2O3-ZrO2 powders

被引：0

作者：

Chen, Chih-Cheng ^{[1
,2
]}

Hsiang, Hsing-I ^{[1
]}

Yen, Fu-Su ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Resources Engn, Particulate Mat Res Ctr, Tainan 70101, Taiwan

[2] Far EastColl, Dept Mech Engn, Tainan, Taiwan

来源：

JOURNAL OF CERAMIC PROCESSING RESEARCH | 2008年 / 9卷 / 01期

关键词：

ceramics; coprecipitation; Al(2)O(3)-ZrO(2); phase transformation; sintering;

D O I：

暂无

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, the effects of aging on the crystalline phases, crystallite sizes and sintering properties of coprecipitated Al(2)O(3)-ZrO(2) powders are investigated using thermogravimetry (TG), differential thermal analysis (I)TA), X-ray diffractometry (XRD), dilatometry, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Coprecipitated Al(2)O(3)-ZrO(2) powder aging in the solution promoted the dissolution and reprecipitation process, which resulted in the boehmite structure subsequently transforming into bayerite. The densification and microstructural development of the coprecipitated Al(2)O(3)-ZrO(2) powders were dependent upon the aging time which shifted the theta ->alpha-Al(2)O(3) phase transformation to a higher temperature, lowered the crystallite growth rate, and prevented the occurrence of intragranular ZrO(2) particles during sintering.

引用

页码：13 / 18

页数：6

共 23 条

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