Microhardness and Microbrittleness of the High-T sub c Superconductor YBaCuO
The microhardness of batches of single crystals of tetragonal (or slightly orthorhombic form) of modifications having a T sub c of approx 59-60K was investigated by indenting the surface perpendicular to the (001) long axis. Specimens were obtained by spontaneous crystallisation from the melt of non...
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Veröffentlicht in: | Fizika tverdogo tela 1989-06, Vol.31 (6), p.263-265 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | rus |
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Zusammenfassung: | The microhardness of batches of single crystals of tetragonal (or slightly orthorhombic form) of modifications having a T sub c of approx 59-60K was investigated by indenting the surface perpendicular to the (001) long axis. Specimens were obtained by spontaneous crystallisation from the melt of non-stoichiometric oxides in the metals ratio Y:Ba:Cu = 1:5:14. Results for Y sub 1 Ba sub 2 Cu sub 3 O sub 7-- delta suggest that the single crystal in general belong to the group of solids very susceptible to brittle fracture. 10 ref.--S.K. |
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ISSN: | 0367-3294 |