Fracturing of borides under neutron irradiation

The neutron irradiation of high-temperature borides results in high internal stresses. This leads to considerable swelling and micro- and macrofracturing. The results of direct investigations of the boride degradation process under neutron irradiation over a wide range of temperatures and fluences h...

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Bibliographic Details
Published in:Journal of nuclear materials 1996-10, Vol.233, p.1349-1354
Main Authors: Grinik, E.U., Ogorodnikov, V.V., Krainy, A.G.
Format: Article
Language:English
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Summary:The neutron irradiation of high-temperature borides results in high internal stresses. This leads to considerable swelling and micro- and macrofracturing. The results of direct investigations of the boride degradation process under neutron irradiation over a wide range of temperatures and fluences have been summarized. A change in the mechanism of radiation damage of borides within the temperature interval of 400 to 530°C is discussed. The macrocracking with formation of annular and radial cracks is observed below this temperature range. The accumulation of microfractures and the process of gas-induced swelling take place at irradiation temperatures above 530°C. The results obtained were conformed by resistance measurement data. The effect of high internal stresses is compared with that of external pressure.
ISSN:0022-3115
1873-4820
DOI:10.1016/S0022-3115(96)00293-0