Toughness and thermal shock resistance of YBa2Cu3O7−x composite superconductors containing Y2BaCuO5 or Ag particles

Tancret, Franck; Monot, I.; Osterstock, F.

doi:10.1016/s0921-5093(00)01316-2

Cited by 30 publications

(27 citation statements)

References 46 publications

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“…The measured hardness in these cases corresponds to an averaged behavior between the superconductor ceramic, the metallic Ag grains and the presence of defects. Taking into account this composite character of ours samples, the present hardness profiles are in agreement with reports in the literature for Y-123 based structures where hardness varies from 4 to 12 GPa [26][27][28][29][30][31][32]. Consequently, the broad range of the reported values can then be attributed to the different sample processing conditions and also to the employed measurement technique, which in almost of all reported situations corresponds to the conventional Vickers method.…”

Section: Resultssupporting

confidence: 89%

Effects of Ag addition on some physical properties of granular YBa2Cu3O7-δ superconductor

Azambuja¹,

Júnior²,

Jurelo³

et al. 2009

Braz. J. Phys.

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The effects of Ag addition on some physical properties of Y Ba 2 Cu 3 O 7−δ superconductor has been studied. The samples were produced by different routes and characterized by scanning electron microscopy, differential thermal analysis, thermogravimetric analysis, X-ray diffraction and nanoindentation. The superconducting properties were studied by dc magnetization and electrical resistivity measurements. The X-ray patterns revealed that all samples were polycrystalline and corresponded to the orthorhombic Y Ba 2 Cu 3 O 7−δ phase. However, for some samples, silver appears to be present within the grains. The superconducting properties were not significantly influenced by Ag addition. Hardness and elastic modulus were also obtained by instrumented indentation. Ag addition was found to be effective in improving the mechanical properties, probably by filling the pores in the grain boundaries. Hardness profiles indicated values between 3.1 and 3.4 GPa at deep tip penetration depths. The highest elastic modulus of 146 GPa was attained for samples prepared using Y 2 O 3 , BaCO 3 , CuO and Ag 2 O as precursors, while the lowest modulus (125 GPa) was obtained for the pure Y Ba 2 Cu 3 O 7−δ sample.

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Section: Resultssupporting

confidence: 89%

Effects of Ag addition on some physical properties of granular YBa2Cu3O7-δ superconductor

Azambuja¹,

Júnior²,

Jurelo³

et al. 2009

Braz. J. Phys.

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“…One of them is the addition of Ag, which causes the reduction of pores and cracks in the microstructure [8][9], higher tensile and bending strengths [10] and an increase in microplasticiy [11].…”

Section: Introductionmentioning

confidence: 99%

“…Another is in melt-textured samples, where the incorporation of particles of the Y 2 BaCuO 5 phase and Ag doping in the matrix increases hardness, elastic modulus and fracture [8,[12][13].…”

Section: Introductionmentioning

confidence: 99%

Depth-Sensing Indentation on REBa2Cu3O7−δ Single Crystals Obtained from Xenotime Mineral

Serbena¹,

Foerster²,

Jurelo³

et al. 2012

Braz J Phys

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“…This effect can also be putted into evidence in the case of 123 melttextured materials, taking into account the stress fields developed around the 211 particles [22].…”

mentioning

confidence: 98%

“…Tancret et al [22] propose a description of the microstructure as a stacking of 123 layers cracked along the (001) crystallographic planes with inserted 211 particles joining them. Crack deviation mechanism by the 211 particles has been observed and the presence of 211 particles has been considered as a key factor for enhancing the toughness of 123 melt-textured materials for only (100) and (010) From general considerations, several mechanisms have been proposed in the literature [23] for increasing fracture toughness in ceramic composites:…”

mentioning

confidence: 99%

The contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains

Mathieu

Cano

Koutzarova

et al. 2003

Supercond. Sci. Technol.

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Hardness and fracture toughness of Dy-123 single-domains were studied by Vickers microindentation. A significant anisotropy of the mechanical properties was observed. Hardness tests give higher values when performed in (001) planes rather than in planes parallel to the caxis. Moreover cracks pattern around the indentation follows preferential orientation in planes parallel to the c-axis whereas a classical four-cracks pattern is observed in the (001) planes.It has been possible to show the crucial role played by the 211-particles in the deviating mechanism of cracks and the relevance of the 211-particle distribution high homogeneity in the material.

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Toughness and thermal shock resistance of YBa2Cu3O7−x composite superconductors containing Y2BaCuO5 or Ag particles

Cited by 30 publications

References 46 publications

Effects of Ag addition on some physical properties of granular YBa2Cu3O7-δ superconductor

Effects of Ag addition on some physical properties of granular YBa2Cu3O7-δ superconductor

Depth-Sensing Indentation on REBa2Cu3O7−δ Single Crystals Obtained from Xenotime Mineral

The contribution of 211 particles to the mechanical reinforcement mechanism of 123 superconducting single domains

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