Mass Transport and Chemical Demixing of Y-Ba-Cu-O Compounds During Sintering in Temperature Gradients
Green, David J. and Halloran, John and Johnson, David W. and Klein, Lisa
A thin cylindrical powder compact (3-mm diameter by 20-mm) with a nominal composition of YBa2Cu3Ox was sintered in a static temperature gradient of 25°C/mm in air for 12 h. the temperature at the hot end of the sample was maintained at 940°±5°C. Considerable mass transport and chemical demixing occurred along the length of the sample. the results are consistent with the formation of a liquid phase at the hot end of the sample, transport of the liquid down the temperature gradient, and the formation of different eutectic compositions along the length of the sample. the implications for processing high-Tc superconductors in the system Y-Ba-Cu-O are discussed.
M. N. Rahaman et al., "Mass Transport and Chemical Demixing of Y-Ba-Cu-O Compounds During Sintering in Temperature Gradients," Journal of the American Ceramic Society, Wiley-Blackwell, Jan 1988.
The definitive version is available at http://dx.doi.org/10.1111/j.1151-2916.1988.tb05066.x
Materials Science and Engineering
Article - Journal
© 1988 Wiley-Blackwell, All rights reserved.