INSITU OBSERVATION OF CASCADE DAMAGE IN GOLD UNDER HEAVY-ION IRRADIATION AT HIGH-TEMPERATURE
INSITU OBSERVATION OF CASCADE DAMAGE IN GOLD UNDER HEAVY-ION IRRADIATION AT HIGH-TEMPERATURE
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DOI：
10.1016/0022-3115(86)90091-7
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发表时间：
1986-11-01
影响因子：
3.1
通讯作者：
MUROGA, T
中科院分区：
文献类型：
--
作者：
ISHINO, S;SEKIMURA, N;MUROGA, T
本文以金为模型材料，研究了高能重离子在高温下辐照产生的空位团簇的形成、稳定性和湮灭。实验采用400千伏重离子加速器/200千伏瞬变电磁炉连接装置进行。在290 ~ 670 K温度的Xe+或Ar+辐照过程中，现场观察发现缺陷团簇是瞬间形成的。这些缺陷包括空位环和层错四面体（SFT），它们具有一些未解决的缺陷。在较低的温度下，团簇倾向于成团形成，反映了亚级联结构，而在570和670 K时，未成团的团簇占主导地位。在辐照时，空位环和SFT的寿命都比没有辐照时短得多。此外，寿命谱有两个组成部分；长分量与SFT有关，而循环的寿命通常较短。通过中断570和670 K的辐照，缺陷湮灭，这一过程有两个组成部分。由于SFT存活时间更长，因此SFT/环路比率依赖于历史。
Formation, stability and annihilation of vacancy clusters produced during irradiation with energetic heavy ions at high temperature have been studied using gold as a model material. The experiments were carried out using a 400 kV heavy ion accelerator/200 kV TEM linked facility. In-situ observation during Xe+or Ar+irradiations at temperatures between 290 and 670 K reveals instantaneous formation of defect clusters. These include vacancy loops and stacking fault tetrahedra (SFT) with some unresolved defects with dot contrast. At lower temperatures the clusters tend to form in groups, reflecting subcascade structure, while at 570 and 670 K, ungrouped clusters are dominant. Both vacancy loops and SFT have considerably shorter lifetimes during irradiation than in the absence of irradiation. Moreover, the lifetime spectrum has two components; a long component is related to SFT, while loops usually have shorter lifetimes. By interrupting irradiation at 570 and 670 K, defects annihilate and the process has two components. Since the SFT survive longer, the SFT/loop ratio is history dependent.