摘要
建立了纳米结构组织锆-4合金腐蚀速率-晶粒尺寸关系模型,计算了高温下纳米组织锆-4合金和腐蚀速率曲线,并与纳米组织锆-4合金在400℃水蒸气中的腐蚀试验数据进行了对比。结果表明:与普通晶粒相比,纳米晶粒尺寸下锆合金的速率低于普通晶粒锆-4合金的腐蚀速率,随着纳米晶粒尺寸的减小,锆-4合金的腐蚀速率也降低;同时,纳米化组织处理推迟了锆-4合金氧化转折时间,使其抗氧化性能得到了提高。
In this paper a computation model of corrosion rate versus grain size of nanocrystalline zircaloy-4 has been presented. The corrosion rates of zircaloy-4 at high temperatures were computed and compared to experiment results of nanocrystalline zircaloy-4 in 400 ℃ steam. The results show that the corrosion resistance of nanocrystalline zircaloy-4 is superior to that ofzircaloy-4 with coarse grain size The corrosion rate constant and mass gain of nanocrystalline zircaloy-4 decrease with the decrease of grain size. So the refinement of grain size can delay the transition duration of the corrosion and remarkably improve the corrosion resistance of zircaloy-4.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第2期273-276,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(50461001,50471086)
核材料与燃料国家级重点实验室基金(514810501)
广西科学基金和技术攻关项目(0575-18、0639003)资助
关键词
锆合金
腐蚀
氧化
纳米材料
zircaloy
corrosion
oxidation
nanocrystalline materials
