Thermal expansion of β-eucryptite in oxide-based ceramic composites

被引：17

作者：

Pelletant, A. ^{[1
,2
]}

Reveron, H. ^{[1
,2
]}

Chevalier, J. ^{[1
,2
]}

Fantozzi, G. ^{[1
,2
]}

Guinot, F. ^{[3
]}

Blanchard, L. ^{[3
]}

Falzon, F. ^{[3
]}

机构：

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

[2] Univ Lyon, CNRS, Lyon, France

[3] Thales Alenia Space, F-06156 Cannes La Bocca, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2013年 / 33卷 / 03期

关键词：

Composites; Thermal expansion; Mechanical properties; Al2O3; beta-Eucryptite; HIGH-STRENGTH; X-RAY; TRANSFORMATION; MICROSTRUCTURE; COEFFICIENT; POWDER; SYSTEM;

D O I：

10.1016/j.jeurceramsoc.2012.09.022

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：

This paper presents an experimental investigation on the thermal expansion behaviour of beta-eucryptite (E) when it is used for processing alumina/beta-eucryptite (AE) or zirconia/beta-eucryptite (ZE) composites. Composite materials were prepared from a beta-eucryptite powder synthetised in our laboratory and commercially available alumina or zirconia nanopowders. In order to preserve the beta-eucryptite crystalline phase in sintered materials, the pressureless sintered step was performed at relatively low temperatures (<1300 degrees C). It is experimentally shown that in well-densified oxide-based composites, the beta-eucryptite lost its slightly negative thermal expansion coefficient. This behaviour could be related to compressive residual stresses applied on beta-eucryptite grains due to the thermal expansion mismatch between alumina or zirconia and the beta-eucryptite. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：531 / 538

页数：8

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