FRACTURE TOUGHNESS OF WASTE GLASSES AT ELEVATED TEMPERATURES
Vickers indentations were performed at room temperature, 100 degrees C and 200 degrees C to determine the fracture toughness (K-Ic) for different waste glasses containing simulated high level waste from nuclear fuel reprocessing. During long term storage in safe deep geological formations, temperatures up to 200 degrees C are expected. K-Ic values were deduced for these conditions from the length of the cracks emerging from the diagonals of the hardness indentations. The validity of an empirical algorithm for room temperature measurements was demonstrated by a good agreement of the results deduced from Vickers identation and those measured with conventional techniques. The algorithm could also be shown to be valid at 100 degrees C and 200 degrees C based on theoretical calculations and on experimental results on a model glass. K-Ic decreased with temperature for most of the waste glasses studied.
Bibliographic Reference: WORKSHOP INDENTATION FRACTURE AND MECHANICAL PROPERTIES OF CERAMIC FUELS AND OF WASTE CERAMICS AND GLASSES, KARLSRUHE (GERMANY), OCT. 11-12, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32862 ORA
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Record Number: 1989125027600 / Last updated on: 1987-03-01
Available languages: en