Alpha decay self-irradiation damage in 238Pu-substituted zirconolite☆
Alpha decay self-irradiation damage in 238Pu-substituted zirconolite☆
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238Pu取代锆英石的α衰变自辐照损伤☆
DOI：
10.1016/0022-3115(82)90381-6
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发表时间：
1982
影响因子：
3.1
通讯作者：
R. B. Roof
中科院分区：
文献类型：
--
作者：
F. Clinard;L. Hobbs;C. C. Land;D. Peterson;D. Rohr;R. B. Roof
将/sup 238/Pu取代的立方锆英石（CaPuTi/sub 2/O/sub 7/）的样品冷压并烧结，然后在环境温度下储存约10分钟。相当于200天。钚同位素的α衰变导致的累积辐射剂量为2.7 x 10/sup 25/。cap alpha../ m/sup 3/.在该剂量下，宏观膨胀达到4.7体积%的饱和值，而X射线膨胀在7 x 10/sup 24/cm时达到饱和。cap alpha../ m/sup 3/，表观体积增加2.2%。该材料在1.3 × 10 - 6/sup 25/cm下变成X射线无定形。cap alpha../ m/sup 3/.少量的微裂纹伴随着肿胀，但一般的分手没有发生。透射电子显微镜观察严重受损的材料表明，变质状态的主要特点是高度无序，电子衍射无定形结构。断裂表面显示在高损伤水平下表现出明显解理的区域数量减少，与无序结构一致。
Samples of /sup 238/Pu-substituted cubic zirconolite (CaPuTi/sub 2/O/sub 7/) were cold-pressed and sintered, then stored at ambient temperature for approx. equal to 200 days. Alpha decay of the plutonium isotope resulted in an accumulated radiation dose of 2.7 x 10/sup 25/ ..cap alpha../m/sup 3/. Macroscopic swelling reached a saturation value of 4.7 vol% at this dose, while X-ray dilation saturated at 7 x 10/sup 24/ ..cap alpha../m/sup 3/ and an apparent volume increase of 2.2%. The material became X-ray amorphous at 1.3 x 10/sup 25/ ..cap alpha../m/sup 3/. A minor amount of microcracking accompanied swelling, but general breakup did not occur. Transmission electron microscopic observations of heavily damaged material indicated a metamict state principally characterized by a highly disordered, electron diffraction-amorphous structure. Fracture surfaces showed a reduction in number of areas exhibiting distinct cleavage at high damage levels, consistent with the disordered structure.