Microstructures and mechanical properties of dense particle gels: Microstructural characterisation

被引：17

作者：

Schenker, Iwan ^{[1
]}

Filser, Frank T. ^{[1
]}

Aste, Tomaso ^{[2
]}

Gauckler, Ludwig J. ^{[1
]}

机构：

[1] ETH, Dept Mat, CH-8093 Zurich, Switzerland

[2] Australian Natl Univ, Dept Appl Math, RSPhysSE, Canberra, ACT 0200, Australia

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2008年 / 28卷 / 07期

关键词：

suspensions; mechanical properties; structure and microstructure; granular matter;

D O I：

10.1016/j.jeurceramsoc.2007.12.007

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：

The macroscopic mechanical properties of wet ceramic green bodies and densely packed coagulated colloidal particle gels strongly depend on the local arrangement of the powder particles on length scales of a few particle diameters. Heterogeneous microstructures exhibit up to one order of magnitude higher elastic properties and yield strengths than their homogeneous counterparts. The microstructures of these gets are analysed by the "straight path" method quantifying quasi-linear arrangements of particles. They show similar characteristics than force chains hearing the mechanical load in granular material. Applying this concept to gels revealed that heterogeneous colloidal microstructures show a significantly higher straight path density and exhibit longer straight paths than their homogeneous counterparts. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1443 / 1449

页数：7

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