High-temperature creep behavior of mixed conducting la0.5Sr 0.5Fe1-xCoxO3-8 (0.5 ≤ x ≤ 1) materials

Hilde Lea Lein; Kjell Wiik; Mari Ann Einarsrud; Tor Grande; Edgar Lara-Curzio

doi:10.1111/j.1551-2916.2006.01176.x

High-temperature creep behavior of mixed conducting la_0.5Sr _0.5Fe_1-xCo_xO_3-8 (0.5 ≤ x ≤ 1) materials

Hilde Lea Lein, Kjell Wiik, Mari Ann Einarsrud, Tor Grande, Edgar Lara-Curzio

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Steady-state compressive creep rate of La_0.5Sr _0.5Fe_0.5Co_0.5O_3-δ (LSFC) and La_0.5Sr_0.5Co_3-δ(LSC) is reported in the temperature region 900°-1050°C and stress range 5-28 MPa. The stress exponents for the two materials were 1.71 ± 0.18 and 1.24 ± 0.15, respectively. The activation energy for creep was considerably higher for LSC (619±56 kJ/mol) than for LSFC (392 ± 28 kJ/mol). The grain size exponent for LSC was 1.28 ± 0.14. Considerably higher creep rates were observed for both materials in N₂ compared with air. Relaxation by creep of chemical-induced stresses in oxygen-permeable membranes is addressed, especially at low partial pressure of oxygen.

Original language	English
Pages (from-to)	2895-2898
Number of pages	4
Journal	Journal of the American Ceramic Society
Volume	89
Issue number	9
DOIs	https://doi.org/10.1111/j.1551-2916.2006.01176.x
State	Published - Sep 2006

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title = "High-temperature creep behavior of mixed conducting la0.5Sr 0.5Fe1-xCoxO3-8 (0.5 ≤ x ≤ 1) materials",

abstract = "Steady-state compressive creep rate of La0.5Sr 0.5Fe0.5Co0.5O3-δ (LSFC) and La0.5Sr0.5Co3-δ(LSC) is reported in the temperature region 900°-1050°C and stress range 5-28 MPa. The stress exponents for the two materials were 1.71 ± 0.18 and 1.24 ± 0.15, respectively. The activation energy for creep was considerably higher for LSC (619±56 kJ/mol) than for LSFC (392 ± 28 kJ/mol). The grain size exponent for LSC was 1.28 ± 0.14. Considerably higher creep rates were observed for both materials in N2 compared with air. Relaxation by creep of chemical-induced stresses in oxygen-permeable membranes is addressed, especially at low partial pressure of oxygen.",

author = "Lein, \{Hilde Lea\} and Kjell Wiik and Einarsrud, \{Mari Ann\} and Tor Grande and Edgar Lara-Curzio",

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language = "English",

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T1 - High-temperature creep behavior of mixed conducting la0.5Sr 0.5Fe1-xCoxO3-8 (0.5 ≤ x ≤ 1) materials

AU - Lein, Hilde Lea

AU - Wiik, Kjell

AU - Einarsrud, Mari Ann

AU - Grande, Tor

AU - Lara-Curzio, Edgar

PY - 2006/9

Y1 - 2006/9

N2 - Steady-state compressive creep rate of La0.5Sr 0.5Fe0.5Co0.5O3-δ (LSFC) and La0.5Sr0.5Co3-δ(LSC) is reported in the temperature region 900°-1050°C and stress range 5-28 MPa. The stress exponents for the two materials were 1.71 ± 0.18 and 1.24 ± 0.15, respectively. The activation energy for creep was considerably higher for LSC (619±56 kJ/mol) than for LSFC (392 ± 28 kJ/mol). The grain size exponent for LSC was 1.28 ± 0.14. Considerably higher creep rates were observed for both materials in N2 compared with air. Relaxation by creep of chemical-induced stresses in oxygen-permeable membranes is addressed, especially at low partial pressure of oxygen.

AB - Steady-state compressive creep rate of La0.5Sr 0.5Fe0.5Co0.5O3-δ (LSFC) and La0.5Sr0.5Co3-δ(LSC) is reported in the temperature region 900°-1050°C and stress range 5-28 MPa. The stress exponents for the two materials were 1.71 ± 0.18 and 1.24 ± 0.15, respectively. The activation energy for creep was considerably higher for LSC (619±56 kJ/mol) than for LSFC (392 ± 28 kJ/mol). The grain size exponent for LSC was 1.28 ± 0.14. Considerably higher creep rates were observed for both materials in N2 compared with air. Relaxation by creep of chemical-induced stresses in oxygen-permeable membranes is addressed, especially at low partial pressure of oxygen.

UR - https://www.scopus.com/pages/publications/33747793778

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DO - 10.1111/j.1551-2916.2006.01176.x

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SN - 0002-7820

VL - 89

SP - 2895

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JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 9

ER -

High-temperature creep behavior of mixed conducting la_0.5Sr _0.5Fe_1-xCo_xO_3-8 (0.5 ≤ x ≤ 1) materials

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