COARSENING OF HELIUM BUBBLES IN FECRNI MEASURED BY SMALL-ANGLE NEUTRON-SCATTERING

被引：13

作者：

CARSUGHI, F ^{[1
]}

KESTERNICH, W ^{[1
]}

SCHWAHN, D ^{[1
]}

ULLMAIER, H ^{[1
]}

SCHROEDER, H ^{[1
]}

机构：

[1] UNIV ANCONA, IST SCI FIS, I-60100 ANCONA, ITALY

来源：

JOURNAL OF NUCLEAR MATERIALS | 1992年 / 191卷

关键词：

D O I：

10.1016/0022-3115(92)90681-A

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A 100 mum thick specimen of Fe-15% Cr-15% Ni (serving as a model alloy for austenitic stainless steels) has been homogeneously implanted with 1200 appm He and then isothermally annealed at 973 K for periods between 0.25 and 2780 h. After each annealing step the size distribution and the density of helium bubbles have been determined by small angle neutron scattering (SANS). After the last annealing step the bubble structure was also measured by TEM and good agreement with SANS results was found. The observed changes of the mean bubble radius and the bubble density with annealing time can be described by power laws. The corresponding exponents of 0.14 and -0.37, respectively, indicate bubble migration and coalescence as the dominating coarsening mechanism. It is further concluded that the gas pressure in the bubbles is significantly higher than the thermal equilibrium value, in agreement with earlier results on pure nickel.

引用

页码：1284 / 1288

页数：5

共 12 条

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