Compressive creep of YBa2Cu3Ox
1990 ◽
Vol 5
(12)
◽
pp. 2766-2770
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YBa2Cu3Ox was deformed from 850 to 980 °C in oxygen partial pressures of 103 to 105 Pa. Steady-state creep rate, ̇, for P(O2) from 104 to 105 Pa could be expressed as ̇ = Aσ1.0 (GS)−2.8±0.6 exp −(970 ± 130 kJ/mole)/RT, where A is a constant, σ the steady-state stress, GS the average grain size, and R and T have their usual meanings, For P(O2) from 103 to 3 ⊠ 103 Pa, the activation energy decreased to about 650 kJ/mole and for a given temperature creep kinetics were much faster. The data and microscopic observations indicated that creep occurred by diffusional flow. Comparisons with diffusion data for YBa2Cu3Ox suggested that Y or Ba may be rate-controlling diffusing species.
1992 ◽
Vol 7
(9)
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pp. 2360-2364
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1985 ◽
Vol 71
(8)
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pp. 1002-1008
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1988 ◽
Vol 22
(2)
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pp. 255-260
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2008 ◽
Vol 55
(8)
◽
pp. 599-606
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2008 ◽
Vol 55
(11)
◽
pp. 809-809
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2006 ◽
Vol 326-328
◽
pp. 553-556
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2006 ◽
Vol 326-328
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pp. 1309-1312
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