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.
Original language | English |
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Pages (from-to) | 2895-2898 |
Number of pages | 4 |
Journal | Journal of the American Ceramic Society |
Volume | 89 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2006 |
Externally published | Yes |