Abstract

Measurements have been carried out on the electrical resistance ER, thermoelectric power TP and absolute Seebeck coefficient α of sintered uranium carbonitride UC 0.43N 0.53O 0.04 during primary creep. Compression creep tests were performed from 1600 to 2000 K in helium under stresses of 20 and 40 MPa. The electrical resistance as well as thermopower exhibit marked changes which are displayed in a form of alternating peaks and dips on time-dependence diagrams. These phenomena are explained in terms of the increase and relaxation of internal stresses within the sample volume during a creep test.

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