Zr-Sn-Nb-Fe合金的第二相颗粒粗化行为

doi:10.13251/j.issn.0254-6051.2020.06.020

金属热处理 ›› 2020, Vol. 45 ›› Issue (6): 89-92.DOI: 10.13251/j.issn.0254-6051.2020.06.020

Zr-Sn-Nb-Fe合金的第二相颗粒粗化行为

吴宗佩, 杨忠波, 易伟

中国核动力研究设计院反应堆燃料及材料重点实验室, 四川成都 610213

收稿日期:2020-01-12 出版日期:2020-06-25 发布日期:2020-09-02
作者简介:吴宗佩(1993—),男,研究实习员,硕士,主要研究方向为核材料,E-mail:wuzpxs@163.com

Coarsening behavior of secondary phase particles in Zr-Sn-Nb-Fe alloy

Wu Zongpei, Yang Zhongbo, Yi Wei

National Key Laboratory for Nuclear Fuel and Material, Nuclear Power Institute of China, Chengdu Sichuan 610213, China

Received:2020-01-12 Online:2020-06-25 Published:2020-09-02

摘要/Abstract

摘要： 采用SEM-SE及定量金相分析技术研究了不同成品退火温度(450～550 ℃,2 h)的两种Zr-Sn-Nb-Fe合金包壳管第二相颗粒的粗化行为。结果表明,升高温度能促进第二相分布均匀化及尺寸粗化的过程。根据粗化二次动力学方程计算得出Zr-0.3Sn-1.2Nb-0.2Fe合金的第二相颗粒粗化激活能为209 kJ/mol,Zr-0.5Sn-0.2Nb-0.8Fe合金的第二相颗粒粗化激活能为179 kJ/mol。粗化激活能的大小与锆合金中Nb含量的高低存在对应关系。

关键词: 锆合金, 成品退火, 微观组织, 第二相颗粒

Abstract: The microstructure of Zr-0.3Sn-1.2Nb-0.2Fe alloy and Zr-0.5Sn-0.2Nb-0.8Fe alloy fuel cladding tubes annealed at different temperatures (450-550 ℃) were studied by means of SEM-SE and quantitative metallography analysis technique. The results show that increasing the temperature can promote the distribution uniformity and size coarsening process of the secondary phase particles. According to the second-order kinetics of Kahlweit theory, the secondary phase particle coarsening activation energy of the Zr-0.3Sn-1.2Nb-0.2Fe alloy and the Zr-0.5Sn-0.2Nb-0.8Fe alloy tubes are proven to be 209 kJ/mol and 179 kJ/mol respectively. The addition of Nb is considered to play an important role in increasing the coarsening activation energy of secondary phase particle.

Key words: zirconium alloy, final annealing, microstructure, secondary phase particles

中图分类号:

TG142.1

吴宗佩, 杨忠波, 易伟. Zr-Sn-Nb-Fe合金的第二相颗粒粗化行为[J]. 金属热处理, 2020, 45(6): 89-92.

Wu Zongpei, Yang Zhongbo, Yi Wei. Coarsening behavior of secondary phase particles in Zr-Sn-Nb-Fe alloy[J]. Heat Treatment of Metals, 2020, 45(6): 89-92.

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Zr-Sn-Nb-Fe合金的第二相颗粒粗化行为

Coarsening behavior of secondary phase particles in Zr-Sn-Nb-Fe alloy

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