论文

β相水淬对Zr-4合金在LiOH水溶液中耐腐蚀性能的影响

  • 沈月锋 ,
  • 姚美意 ,
  • 张欣 ,
  • 李强(上海大学) ,
  • 周邦新 ,
  • 赵文金
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  • 1) 上海大学材料研究所, 上海 200072
    2) 上海大学微结构重点实验室, 上海 200444
    3) 中国核动力研究设计院核燃料及材料国家级重点实验室, 成都 610041
沈月锋, 男, 1986年生, 硕士生

收稿日期: 2011-04-13

  修回日期: 2011-05-11

  网络出版日期: 2011-07-11

基金资助

国防科技重点实验室基金项目;国家自然科学基金项目;国家高新技术研究发展计划项目;上海市自然科学基金项目;上海市重点学科建设项目

EFFECT OF β-QUENCHING ON THE CORROSION RESISTANCE OF Zr-4 ALLOY IN LiOH AQUEOUS SOLUTION

  • CHEN Ru-Feng ,
  • YAO Mei-Yi ,
  • ZHANG Xin ,
  • LI Jiang-(ShangHaiTaiHua) ,
  • ZHOU Bang-Xin ,
  • DIAO Wen-Jin
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  • 1) Institute of Materials, Shanghai University, Shanghai 200072
    2) Laboratory for Microstructures, Shanghai University, Shanghai 200444
    3) The Key Laboratory for Nuclear Fuel and Materials, Nuclear Power Institute of China, Chengdu 610041

Received date: 2011-04-13

  Revised date: 2011-05-11

  Online published: 2011-07-11

Supported by

Supported by Defense Technology Key Laboratory Fund Project (No.9140C70040108C70), National\par Natural Science Foundation of China (No.50971084), High Technology Research and Development Program of China (No.2008AA031701), Natural Science Foundation of Shanghai (No.09ZR1411700) and Shanghai Leading Academic Discipline Project No.S30107)

摘要

采用β相水淬处理后再经480-600 ℃保温2-200 h的工艺, 研究了β相水淬对Zr-4合金在 360℃/18.6 MPa和0.01 mol/L LiOH水溶液中腐蚀行为的影响; 用TEM和HRSEM分别观察了合金的显微组织和氧化膜断口形貌. 结果表明: β相水淬时控制合适的冷却速率, 避免残留β-Zr的生成, 提高固溶在α-Zr基体中Fe和Cr含量, Zr-4合金也可获得与Zr-Sn-Nb合金一样优良的耐腐蚀性能. 但当β相水淬速率过快时, 由于残留β-Zr的存在使Zr-4合金的耐腐蚀性能降低; 而随后进行 480-600 ℃退火处理, 随着退火温度的升高和退火时间的延长, β相水淬快冷样品的耐腐蚀性能得到明显改善, 这主要与残留β-Zr的分解有关.

本文引用格式

沈月锋 , 姚美意 , 张欣 , 李强(上海大学) , 周邦新 , 赵文金 . β相水淬对Zr-4合金在LiOH水溶液中耐腐蚀性能的影响[J]. 金属学报, 2011 , 47(7) : 899 -904 . DOI: 10.3724/SP.J.1037.2011.00233

Abstract

To investigate the effect of $\beta$--quenching on the corrosion behavior, Zr--4 specimens were
$\beta$--quenched and subsequently annealed at 480---600 ℃ for 2---200 h. The corrosion tests were carried out in
0.01 mol/L LiOH aqueous solution at 360 ℃/18.6 MPa. The microstructure of Zr--4 specimens and fracture
surface morphology of oxide films on the corroded specimens were observed by TEM and HRSEM,
respectively. The results show that Zr--4 specimens exhibit excellent corrosion resistance as Zr--Sn--Nb
alloys in LiOH aqueous solution after increasing the solid solution content of Fe and Cr in $\alpha$--Zr matrix by
suitable quenching rate from $\beta$--phase to avoid the formation of $\beta$--Zr.
When the cooling rate is too fast, the specimens show worse corrosion resistance due to the formation

Key words: β -quenching

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