Microstructure and mechanical properties of Sm1-xSrx Co0.2Fe0.8O3

Y. S. Chou, J. W. Stevenson, T. R. Armstrong, J. S. Hardy, K. Hasinska, L. R. Pederson

Research output: Contribution to journalArticle

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Abstract

The room temperature mechanical properties of a mixed conducting perovskite Sm1-xSrxCo0.2Fe0.8O3 (x = 0.2 to 0.8) were examined. Density, crystal phase, and microstructure were characterized. It was found that the grain size increased abruptly with increasing Sr content. Mechanical properties of elastic modulus, microhardness, indentation fracture toughness, and biaxial flexure strength were measured. Young's modulus of 180-193 GPa and shear modulus of 70-75 GPa were determined. The biaxial flexure strength was found to decrease with increasing Sr content from ∼70 to ∼20 MPa. The drop in strength was due to the occurrence of extensive cracking. Indentation toughness showed a similar trend to the strength in that it decreased with increasing Sr content from ∼1.1 to ∼0.7 MPa m1/2. In addition, fractography was used to characterize the fracture behavior in these materials.

Original languageEnglish
Pages (from-to)1505-1513
Number of pages9
JournalJournal of Materials Research
Volume15
Issue number7
Publication statusPublished - Jul 2000
Externally publishedYes

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Elastic moduli
mechanical properties
Indentation
Mechanical properties
microstructure
Microstructure
flexing
indentation
modulus of elasticity
Fractography
fractography
Perovskite
Microhardness
Toughness
Fracture toughness
toughness
fracture strength
microhardness
Crystals
grain size

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Chou, Y. S., Stevenson, J. W., Armstrong, T. R., Hardy, J. S., Hasinska, K., & Pederson, L. R. (2000). Microstructure and mechanical properties of Sm1-xSrx Co0.2Fe0.8O3. Journal of Materials Research, 15(7), 1505-1513.

Microstructure and mechanical properties of Sm1-xSrx Co0.2Fe0.8O3. / Chou, Y. S.; Stevenson, J. W.; Armstrong, T. R.; Hardy, J. S.; Hasinska, K.; Pederson, L. R.

In: Journal of Materials Research, Vol. 15, No. 7, 07.2000, p. 1505-1513.

Research output: Contribution to journalArticle

Chou, YS, Stevenson, JW, Armstrong, TR, Hardy, JS, Hasinska, K & Pederson, LR 2000, 'Microstructure and mechanical properties of Sm1-xSrx Co0.2Fe0.8O3', Journal of Materials Research, vol. 15, no. 7, pp. 1505-1513.
Chou YS, Stevenson JW, Armstrong TR, Hardy JS, Hasinska K, Pederson LR. Microstructure and mechanical properties of Sm1-xSrx Co0.2Fe0.8O3. Journal of Materials Research. 2000 Jul;15(7):1505-1513.
Chou, Y. S. ; Stevenson, J. W. ; Armstrong, T. R. ; Hardy, J. S. ; Hasinska, K. ; Pederson, L. R. / Microstructure and mechanical properties of Sm1-xSrx Co0.2Fe0.8O3. In: Journal of Materials Research. 2000 ; Vol. 15, No. 7. pp. 1505-1513.
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