| 1. |
- Staun Olsen, J., et al.
(author)
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High pressure studies up to 50 GPa of Bi-based high-Tc superconductors
- 1991
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In: Physica Scripta. - : IOP Publishing. - 0031-8949 .- 1402-4896. ; 44:2, s. 211-213
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Journal article (peer-reviewed)abstract
- The high-Tc superconductor with nominal composition BiSrCaCu2Ox has been studied at high pressure, i.e. up to 50 GPa. A tetragonal structure was compatible with the measurements at all pressures, and no phase change was observed. The bulk modulus, B0 = 62.5 GPa, obtained has a somewhat smaller value than the one estimated earlier.
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| 2. |
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| 3. |
- Xie, Z.L., et al.
(author)
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Isothermal martensitic transformation under hydrostatic pressure in an Fe-Ni-C alloy at low temperatures
- 1993
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In: Acta Metallurgica Et Materialia. - Oxford : Elsevier Science Ltd. - 0956-7151. ; 41:8, s. 2283-2290
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Journal article (peer-reviewed)abstract
- The isothermal martensitic tranformation under applied hydrostatic pressure has been investigated with an Fe-21.5Ni-0.95C alloy single crystal by electrical resistivity, magnetic susceptibility, X-ray diffraction and optical microscopy. The martensitic transformation starting temperature, M(s), is lowered by applied hydrostatic pressure. The isothermal martensitic transformation occurs first as a burst under a critical pressure and it is continued by further transformation with decreasing hydrostatic pressure The critical pressure under which the isothermal martensitic transformation starts changes curvilinearly with decreasing temperature. The morphology of the isothermal martensite formed under hydrostatic pressure is similar to that of athermal martensite. The temperature dependence of the critical pressure under which martensitic transformation starts has been calculated based on the homogeneous nucleation model and the heterogeneous nucleation model.
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