Mechanical performance of LaCrO3 doped with strontium and cobalt for SOFC interconnect

被引：10

作者：

Acchar, W. ^{[1
]}

Sousa, C. R. C. ^{[1
]}

Mello-Castanho, S. R. H.

机构：

[1] Fed Univ Rio Grande Norte UFRN, Postgrad Program Sci & Mat Engn, BR-59072970 Natal, RN, Brazil

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 550卷

关键词：

Lanthanum chromite; Sintering; Strength; Hardness; OXIDE FUEL-CELLS; CHROMITE; POWDERS;

D O I：

10.1016/j.msea.2012.04.026

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Doped lanthanum chromite was investigated as ceramic interconnect materials to be used in high-temperature solid oxide fuel cells (SOFCs). In this work, a La0.80Sr0.20Cr0.92Co0.08O3 powder produced by combustion synthesis was used to obtain dense specimens. Powders were uniaxially compacted under a load of 30 MPa and sintered at 1500 degrees C for 4 h in air. The sintered specimens were characterized in terms of crystalline phases, density and porosity, strength and hardness measurements, deformation behavior, fracture mode and microstructure aspects. The results have shown dense samples (6.09 g/cm(3)) with strength and hardness values of 62 MPa and 5.98 GPa, respectively. Surface micrograph indicates a mixture of inter- and transgranular fracture modes, a brittle deformation behavior and grain size around 3 mu m. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：76 / 79

页数：4

共 19 条

[1] Low temperature sintering of La(Ca) CrO3 prepared by an autoignition process [J].