Microstructure development in calcium hexaluminate

被引：152

作者：

Domínguez, C

Chevalier, J ^{[1
]}

Torrecillas, R

Fantozzi, G

机构：

[1] Inst Natl Sci Appl, GEMPPM, UMR5510, F-69621 Villeurbanne, France

[2] CSIC, INCAR, Oviedo 33080, Spain

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2001年 / 21卷 / 03期

关键词：

CaAl12O9; grain growth; grain morphology; microstructure-final;

D O I：

10.1016/S0955-2219(00)00143-6

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：

Calcium hexaluminate (CA(6)) was prepared from alumina and calcium carbonate powders, The influence of processing method and firing temperature on calcium hexaluminate grain morphology was studied. A significant correlation was found between grain morphology and green density. porosity distribution and presence of agglomerates. platelet grains were observed for low green densities and large pores, while more equiaxed grains were found when green density was increased. A model is proposed for the formation of equiaxed or platelet grains. The model is based on the number of contact areas between alumina and calcium carbonate grains in green specimens as well as on the free space available for calcium hexaluminate to grow. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：381 / 387

页数：7

共 36 条

[1] R-curve behavior of in-situ-toughened Al2O3:CaAl12O19 ceramic composites [J].