F. Tancret et al., COMPOSITE EFFECTS FOR INCREASED TOUGHNESS AND THERMAL-SHOCK RESISTANCE OF SINTERED YBACUO SUPERCONDUCTORS, Annales de chimie, 23(1-2), 1998, pp. 225-228
Porous polycrystalline high-T-c superconducting YBaCuO and particulate
composites (123/211 and 123/Ag) have been processed in view of induci
ng R-curve effects and improved thermal shock resistance. The latter h
as been investigated in using the stage of stable extension of Vickers
indentation cracks. It makes clearly the difference between the 123 o
r 123/211 ceramics and the 123/Ag cermet, in accordance with the chang
es in their fracture and thermophysical properties.