THEORY OF SWELLING AND GAS RELEASE FOR REACTOR MATERIALS
THEORY OF SWELLING AND GAS RELEASE FOR REACTOR MATERIALS
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DOI：
10.1016/0022-3115(64)90002-9
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发表时间：
1964-01-01
影响因子：
3.1
通讯作者：
BARNES, RS
中科院分区：
文献类型：
--
作者：
BARNES, RS
从电子显微镜中直接观察惰性气体气泡推导出的物理机制被用来发展膨胀的模型或理论。该模型假设惰性气体的不溶性和气泡的整体迁移，并依赖于惰性气体的状态方程，表面能，表面自扩散系数，和固体的晶格参数，并在一些内部驱动力，这被认为是与位错线的线张力。利用这些参数的值以及辐照和退火条件，对气泡尺寸（r）和数量/cm 3（n）进行了估计。由此可以计算膨胀（Δ VV），但必须考虑晶粒尺寸、晶界迁移和固体的其他结构特征的影响。该模型进行了测试，从各种固体和令人满意的协议获得的几个实验结果。该模型被认为是有效的所有固体，包括非金属，并可以考虑脱离膨胀和气体释放。该模型是一个非常简单的模型，其局限性进行了讨论。
The physical mechanisms deduced from the direct observation of inert gas bubbles in the electron microscope are used to evolve a model, or theory, for swelling. The model assumes the insolubility of the inert gases and the bodily migration of the gas bubbles, and relies upon the equation of state for the inert gas, upon the surface energy, the surface self-diffusion coefficient, and the lattice parameter of the solid, and upon some internal driving force, which is believed to be related to the line tension of dislocation lines. With values for these parameters and the irradiation and annealing conditions, estimates for the bubble size (r) and number/cm 3 (n) are made. From these the swelling (Δ V V) can be calculated, but the effect of grain size, grain boundary migration, and other structural features of the solid must be considered. The model is tested against several experimental results from a variety of solids and satisfactory agreement obtained. The model is thought to be valid for all solids, including non-metals, and can account for breakaway swelling and gas release. The limitations of the model, wh⌝ ch is a very simple one, are discussed.