Ice templating of ZrB2 porous architectures

被引：39

作者：

Landi, Elena ^{[1
]}

Sciti, Diletta ^{[1
]}

Melandri, Cesare ^{[1
]}

Medri, Valentina ^{[1
]}

机构：

[1] CNR ISTEC, Natl Res Council Italy, Inst Sci & Technol Ceram, I-48018 Faenza, Italy

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2013年 / 33卷 / 10期

关键词：

Zirconium diboride; Freeze casting; Porous UHTC; Mechanical properties; Volumetric solar absorber; ZIRCONIUM DIBORIDE; POROSITY; PROPERTY;

D O I：

10.1016/j.jeurceramsoc.2013.01.037

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：

For the first time, freeze casting of aqueous ZrB2 based suspension was performed in order to produce porous architectures with main unidirectional anisotropic pores interconnected by diffuse globular-isotropic pores. The porosity characterizing the green bodies after the sublimation process is the replica of the ice crystals. The effects of solid content, suspension stabilization and cold transmission depending on mold type were studied since micro and macrostructure and, hence, the properties of the sintered body are determined by controlling the growth direction of the ice crystals during freezing. Improved mechanical performances are obtained by changing the above mentioned parameters, in virtue of the formation of thinner and more homogenously distributed ceramic lamellae. Possible applications of these materials include high temperature porous volumetric absorbers for concentrating solar power systems. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1599 / 1607

页数：9

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