锆合金氧化膜弹性模量的测定

Measurement of Elastic Modulus of Zirconium Alloy Oxide Films

氧化膜的内应力对锆合金的腐蚀行为有重要影响,弹性模量是计算分析氧化膜内应力的关键物性参数。由于测试困难,锆合金氧化膜的弹性模量通常根据块体材料的数据进行估计。本文利用纳米压痕法测试分析了多种条件下锆合金氧化膜的弹性模量和硬度,研究发现其表面和截面的弹性模量与硬度数值存在差异。与纯水相比,在含锂水介质中腐蚀,锆合金氧化膜的弹性模量及硬度偏小。

The internal stress of the oxide film has an important influence on the corrosion behavior of the zirconium alloy, and the elastic modulus is the key physical parameter for calculating and analyzing the internal stress of the oxide film. Due to the difficulty of testing, the elastic modulus of the zirconium alloy oxide film is usually estimated based on the data of bulk materials. In this paper, the elastic modulus and the hardness of the oxide film of the zirconium alloy under various conditions was analyzed by nano-indentation tests. It was found that the elastic modulus and hardness of the oxide surface and oxide cross section are different. Compared with the alloys corroded in pure water, the elastic modulus and hardness of the oxide film are smaller for the alloys corroded in lithium-containing water.