Release of helium from irradiation damage in Fe-9Cr ferritic alloy
Release of helium from irradiation damage in Fe-9Cr ferritic alloy
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DOI：
10.1016/j.jnucmat.2004.04.061
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发表时间：
2004-08-01
影响因子：
3.1
通讯作者：
Yoshida, N
中科院分区：
文献类型：
--
作者：
Ono, K;Arakawa, K;Yoshida, N
通过热解吸光谱法（TDS）研究了在 85 或 473 K 温度下用 5 keV He+ 离子辐照的 Fe-9Cr 和纯 Fe 中氦的热解吸，并通过 TEM 在室温至 1270 K 的温度下研究了相关的微观结构变化。结果发现Fe-9Cr试样中出现了5个TDS峰，这些峰与微观结构的变化有很好的相关性。从这些结果来看，五个峰 I-Cr、IICr、IIICr、IVCr 和 V-Cr 可能分别归因于空位-氦-自填隙原子复合物或非常小的环的破裂所捕获的氦原子的释放、滑移到样品表面或填隙型位错环的合并、位错环的收缩、气泡迁移到样品表面和α-γ相变。 STEM-EELS 揭示了 Fe-9Cr 中环和气泡周围 Cr 的沉淀，这可能会将相关的 TDS 峰移至更高的温度。 (C) 2004 Elsevier B.V. 保留所有权利。
Thermal desorption of helium from Fe-9Cr and pure Fe which were irradiated with 5 keV He+ ions at 85 or 473 K have been studied by thermal desorption spectrometry (TDS) at temperatures from room temperature to 1270 K and related microstructure changes by TEM. It is found that five TDS peaks appear in Fe-9Cr specimen and these peaks are well correlated with microstructure changes. From these results, the five peaks I-Cr, IICr, IIICr, IVCr and V-Cr may be attributed to release of trapped helium atoms by the break-up of vacancy-helium-self-interstitial atom complexes or very tiny loops, glide to the specimen surface or coalescence of interstitial type dislocation loops, shrinkage of dislocation loops, bubble migration to the specimen surface and alpha-gamma phase transformation, respectively. Precipitation of Cr around the loops and bubbles in Fe-9Cr is revealed by STEM-EELS and this could shift the related TDS peaks to higher temperatures. (C) 2004 Elsevier B.V. All rights reserved.