Effects of temperature history during neutron irradiation on the microstructure of vanadium alloys
Effects of temperature history during neutron irradiation on the microstructure of vanadium alloys
复制标题
中子辐照温度历程对钒合金显微组织的影响
DOI：
10.1016/0022-3115(94)90163-5
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发表时间：
1994
影响因子：
3.1
通讯作者：
A. Kimura
中科院分区：
文献类型：
--
作者：
H. Matsui;K. Kuji;M. Hasegawa;A. Kimura
采用改进的控温方式研究了裂变中子辐照下钒基二元合金中空穴的形成行为。后一种方法采用电加热器，并能够避免在反应堆启动期间的温度下的不必要的辐射。重点讨论了原子尺寸因子对空穴形核和长大的影响。在这项研究中使用的透射电子显微镜和正电子寿命测量。已经发现，空隙尺寸和密度与原子尺寸因子之间存在强相关性;较大的溶质原子产生较高的空隙密度。通过正电子寿命测量检测到的在200°C下的微孔形成与通过TEM观察到的在350°C下的微孔形成非常一致。温度控制方式对孔洞的形成有显著的影响。
Void formation behavior under fission neutron irradiation was studied in vanadium based binary alloys using an improved temperature control mode. The latter method employs an electric heater and enables to avoid unwanted irradiation at temperatures during reactor startup. Emphasize was on the effect of the atomic size factor on void nucleation and growth. Transmission electron microscopy and positron lifetime measurements were used in this study. It has been found that a strong correlation exists between the void size and density and the atomic size factor; larger solute atoms yields a higher void density. Microvoid formation at 200°C detected by positron lifetime measurement agrees very well with void formation at 350°C observed by TEM. It has also been demonstrated that the temperature control mode has a striking effect on void formation.