Study of cascade damage effects detected by dynamic behavior of helium bubbles

氦气泡动态行为检测级联损伤效应研究

基本信息

批准号：
14550654
负责人：
ONO Kotaro
金额：
$ 1.92万
依托单位：
Shimane University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550654/
关键词：
irradiation damage helium bubble electron microscopy fusion reactor materials Fe,Fe-9Cr alloy Cu lattice defect Fe Au ヘリウム電子顕微鏡 Fe-Cr合金

项目摘要

(1)Study of cascade damage effects detected by dynamic behavior of helium bubblesHigh energy (100-400keV) self-ions were irradiated to Au,Cu,Si,Fe and Fe-Cr alloys specimens, to which helium bubbles were pre-introduced by irradiation with 10keV helium ions, and the dynamical behavior of the bubbles during the irradiation of high energy self-ions was studied by in-situ IVEM observation at Argonne National Laboratory. Helium bubbles can be used as a sensor for the cascade damage. It was found that most of the bubbles showed Brownian type-random motion even under the irradiation with high energy self-ions at high temperature, but their mobility was depressed. But, a small number of the bubble were accelerated. The depression and the acceleration of the bubbles should be caused by absorption of vacancies and by direct collision with ions, respectively. At middle temperatures, random motion of the bubble did not occur and an intermittent motion of helium bubbles along a dislocation loop was … More induced under the irradiation with high energy self-ions. Easy motion of helium bubbles along the dislocation lines at these temperatures was revealed. At lower temperatures, a sporadic motion in a limited region was revealed and this could be caused by direct collision with the cascade damage.(2)Interaction of the bubble with dislocation and one-dimensional motion of dislocation loopsThe interaction of helium bubbles with the dislocation was comparatively strong. It was revealed that the small bubble was thermally mobile along the dislocation line and the other directions. Bubbles can be used as a sensor of the strain field in the dislocation.One-dimensional motion of the small interstitial type dislocation loops with the burgers vector 1/2<111> was studied during annealing or under the electron irradiation and it was revealed that the burgers vector changes to the other 1/2<111> or to <100> during the one-dimensional motion. At lower temperature, the number density of the loops increases in Fe-9Cr and it was suggested that one dimensional motion could be induced by their elastic interaction.(3)TDS(Thermal Desorption Spectroscopy) of helium and its correlation with a change of the microstructure in Fe,Fe-9CrTDS spectra from helium irradiated Fe and Fe-9Cr and the correlated microstructure changes were studied. During a constant heating of the specimen up to 1000℃, five TDS peaks were observed. The peaks at lower temperatures are correlated with the dislocation trapping and ones at higher temperatures are correlated with the bubble motion to the surface and alpha-gamma phase transformation. Chromium segregated to the bubble or dislocation loops could shift the TDS peaks to higher temperature in Fe-9Cr alloy. Less

(1) Study of cascade damage effects detected by dynamic behavior of helium bubblesHigh energy (100-400keV) self-ions were irradiated to Au, Cu, Si, Fe and Fe-Cr alloys specimens, to which helium bubbles were pre-introduced by irradiation with 10keV helium ions, and the dynamic behavior of the bubbles during the irradiation of high energy self-ions was studied by in-situ IVEM observation at Argonne国家实验室。氦气气泡可以用作级联损伤的传感器。发现大多数气泡即使在高温下具有高能量自我的辐射下，也显示出Brownian型随机运动，但它们的迁移率却很沮丧。但是，少数气泡加速了。抑郁症和气泡的加速应分别是由空位滥用和与离子直接碰撞引起的。在中等温度下，没有发生气泡的随机运动，并且沿位错环的氦气气泡的间歇运动是……在辐射下以高能量自我化为诱导。揭示了在这些温度下沿错位线的氦气气泡的简单运动。在较低的温度下，揭示了有限区域中的零星运动，这可能是由与级联损伤直接碰撞引起的。（2）气泡与位错的相互作用和位错的一维运动循环氦气气泡与脱位的相互作用相对强。据透露，小气泡是沿错位线和其他方向的热活动。气泡可以用作位错中应变场的传感器。小型间隙类型脱位环与汉堡矢量1/2 <111>在退火期间或在电子辐照下进行了研究，并且发现汉堡向量向其他1/2 <111> <111>或<100> <100> <100> hementimentions of the burgers vector变化。在较低的温度下，循环的数量密度在FE-9CR中增加，并建议通过其弹性相互作用引起一个维运动。（3）TDS（3）TDS（热吸附光谱）的氦气及其与Fe-9Crtds在FE-9CRTDS在FE-9CRINCTIDER中的微结构变化的相关性的相关性。在恒定加热的样品中，观察到五个TDS峰。较低温度下的峰与脱位陷阱相关，并且在较高温度下的峰与表面的气泡运动和α-伽马相变的相关。在Fe-9CR合金中，铬隔离为气泡或脱位环可能会将TDS峰转移到更高的温度。较少的