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Nb涂層N36鋯合金退火過程中缺陷演化行為的原位透射電鏡研究
作者:
作者單位:

1.西安交通大學核科學與技術學院;2.中國核動力研究設計院第一研究所

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基金項目:

國家重點研發(fā)計劃(2022YFB190122)；國家自然科學基金(12205232)；西安交通大學基本科研業(yè)務費(xzy012022077)


In Situ TEM Study on Defect Evolution Behavior of Nb Coated N36 Alloy During Annealing
Author:
Affiliation:

1.Department of Nuclear Science and Technology,Xi'an Jiaotong University,Xi'an;2.The First Sub-institute,Nuclear Power Institute of China,Chengdu

Fund Project:

National Key Research and Development Program of China under Grant No.2022YFB190122; National Natural Science Foundation of China under Grant No.12205232; Basic Research Expenses of Xi "an Jiaotong University under Grant No.xzy012022077)

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    摘要:

    福島核事故之后,為鋯合金表面涂覆涂層是一種提高核燃料包殼事故容錯能力的重要方式。含Nb涂層N36合金輻照后的透射電鏡樣品利用聚焦離子束進行制備,并通過原位透射電子顯微鏡研究了氪離子注入后,Nb涂層在退火過程中的氣泡生長行為。原位加熱結果表明,在退火過程中,界面對氣泡的生長存在影響,界面在加熱過程中通過對周圍氣泡的捕獲與輸送,導致界面附近氣泡的生長速度低于遠離界面的氣泡生長速度。退火后的元素分析表明,輻照與加熱均會導致涂層-基體元素擴散距離的增加,其中輻照過程中的元素擴散由熱峰混合機制主導。元素的擴散有助于提高涂層的結合性能,并為N36合金提供一定的抗腐蝕能力。

    Abstract:

    Coating the surface of zirconium alloy is an important way to improve the accident tolerance capability for nuclear fuel cladding after the Fukushima nuclear power plant accident. Transmission electron microscopy (TEM) samples of the irradiated N36 alloy with Nb coating were prepared by focusing ion beam (FIB). Bubble evolution during in-situ heating in the irradiated Nb-coated N36 alloy samples was investigated by in-situ TEM. The results show that the interface has a strong effect on bubble growth during the annealing process. The bubbles near the interface were captured and transported by the interface, which leads to the growth rate of the bubbles near the interface is lower than those away from the interface. The analysis of elements after annealing indicates that both irradiation and heating can increase the diffusion distance of the elements between coating and matrix, the diffusion during irradiation is mainly caused by the thermal spike diffusion mechanism. The diffusion of elements is beneficial to improve the bonding properties of the coating and provide certain corrosion resistance for N36 alloy.

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魏銘言,雷鵬輝,張平,王云鵬,吳璐,王楨,伍曉勇,盧晨陽. Nb涂層N36鋯合金退火過程中缺陷演化行為的原位透射電鏡研究[J].稀有金屬材料與工程,2023,52(8):2985~2992.[Mingyan Wei, Penghui Lei, Ping Zhang, Yunpeng Wang, Lu Wu, Zheng Wang, Xiaoyong Wu, Chengyang Lu. In Situ TEM Study on Defect Evolution Behavior of Nb Coated N36 Alloy During Annealing[J]. Rare Metal Materials and Engineering,2023,52(8):2985~2992.]
DOI：10.12442/j. issn.1002-185X.20220959

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歷史
  • 收稿日期:2022-12-08
  • 最后修改日期:2023-02-16
  • 錄用日期:2023-03-07
  • 在線發(fā)布日期: 2023-08-28
  • 出版日期: 2023-08-24