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Superconductors, high mechanical strength

In order to realize the potential of these ceramics they must be fabricated, and with such a low decomposition temperature sintering to high strength is proving a problem. Hardness determinations will prove useful in characterizing the mechanical properties of these and other ceramic superconductors, but as yet little has been reported. Table 6.21 contains hardness values obtained for the YBa2Cu307 superconductor at room temperature and at liquid Nj temperatures (77 K). As expected, the Vickers hardness rises to 3.1 GPa at 77 K and some success with sinter additives is achieved because the standard material hardness is raised from 2.2 to 2.5 GPa after sintering in their presence. Indentation hardness techniques have been used to establish the Kic value of 1.1 MPam. ... [Pg.152]

See other pages where Superconductors, high mechanical strength is mentioned: [Pg.256]    [Pg.254]    [Pg.157]    [Pg.155]    [Pg.141]    [Pg.336]    [Pg.140]    [Pg.210]    [Pg.490]    [Pg.151]    [Pg.4523]    [Pg.215]    [Pg.4522]    [Pg.103]    [Pg.446]    [Pg.367]    [Pg.3416]    [Pg.118]    [Pg.8]   
See also in sourсe #XX -- [ Pg.232 ]



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