Sintering and mechanical characteristics of lanthanum strontium manganite

The sintering and mechanical characteristics of strontium-doped lanthanum manganites are increasingly important for both processing and device integration. A-site deficiency and reduced strontium fraction were shown to improve sinterability. High-strontium compositions displayed unusual mechanical p...

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Bibliographic Details
Published in:Solid state ionics 2002-02, Vol.146 (3), p.273-284
Main Authors: Meixner, D.Laurence, Cutler, Raymond A
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Creep
Exact sciences and technology
Fatigue, brittleness, fracture, and cracks
Lanthanum manganite
Lanthanum strontium manganite
Mechanical and acoustical properties of condensed matter
Mechanical properties
Mechanical properties of solids
Oxygen nonstoichiometry
Perovskite
Physics
Plastic deformation
SOFC
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Summary:The sintering and mechanical characteristics of strontium-doped lanthanum manganites are increasingly important for both processing and device integration. A-site deficiency and reduced strontium fraction were shown to improve sinterability. High-strontium compositions displayed unusual mechanical properties, including unexpectedly low Young's modulus and fracture strength. In addition, plastic deformation of a fully dense LSM plate under modest loading was observed. This surprising and novel result may result from oxygen exchange with the LSM surface at elevated temperatures.
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(01)01027-X