添加Bi对Zr-1Nb合金在360 ℃和18.6 MPa去离子水中耐腐蚀性能的影响

doi:10.3724/SP.J.1037.2012.00378

金属学报

2013, Vol. 49

Issue (1): 51-57 DOI: 10.3724/SP.J.1037.2012.00378

论文

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添加Bi对Zr-1Nb合金在360 ℃和18.6 MPa去离子水中耐腐蚀性能的影响

朱莉^{1, 2},姚美意^{1, 2},孙国成^{1, 2}，陈文觉^{1, 2},张金龙^{1, 2},周邦新^{1, 2}

1. 上海大学微结构重点实验室, 上海 200444
2. 上海大学材料研究所, 上海 200072

EFFECT OF Bi ADDITION ON THE CORROSION RESISTANCE OF Zr-1Nb ALLOY IN DEIONIZED WATER AT 360 ℃ AND 18.6 MPa

ZHU Li^{1, 2}, YAO Meiyi^{1, 2}, SUN Guocheng^{1, 2},CHEN Wenjue ^{1, 2}, ZHANG Jinlong^{1, 2},ZHOU Bangxin^{1, 2}

1. Laboratory for Microstructures, Shanghai University, Shanghai 200444
2. Institute of Materials, Shanghai University, Shanghai 200072

引用本文:

朱莉,姚美意,孙国成，陈文觉,张金龙,周邦新. 添加Bi对Zr-1Nb合金在360 ℃和18.6 MPa去离子水中耐腐蚀性能的影响[J]. 金属学报, 2013, 49(1): 51-57.
ZHU Li, YAO Meiyi, SUN Guocheng, CHEN Wenjue, ZHANG Jinlong, ZHOU Bangxin. EFFECT OF Bi ADDITION ON THE CORROSION RESISTANCE OF Zr-1Nb ALLOY IN DEIONIZED WATER AT 360 ℃ AND 18.6 MPa[J]. Acta Metall Sin, 2013, 49(1): 51-57.

全文: PDF(1023 KB)

摘要:

利用高压釜腐蚀实验研究了Zr-1Nb-xBi(x=0.05-0.3, 质量分数, %)合金在360 ℃和18.6 MPa去离子水中的耐腐蚀性能. 结果表明, 在Zr--1Nb合金的基础上添加Bi能明显改善其耐腐蚀性能, 且随着Bi含量的增加, 合金的耐腐蚀性能进一步提高.合金显微组织的TEM观察和EDS分析表明, 合金中存在ZrNbFe型和β-Nb第二相,Bi含量对第二相的种类、尺寸和数量没有明显的影响; 0.3%的Bi可全部固溶在α-Zr基体中, 且不影响Nb的固溶含量. 氧化膜断口和内表面形貌的SEM观察表明,固溶在α-Zr基体中的Bi能够明显延缓氧化膜显微组织的演化, 包括孔隙发展成为微裂纹的过程和柱状晶向等轴晶的转变.

关键词 ： Zr-1Nb合金, Bi, 耐腐蚀性能, 显微组织

Abstract：

The effect of Bi contents on the corrosion resistance of Zr-1Nb-xBi (x=0.05-0.3, mass fraction, %) was investigated in deionized water at 360 ℃ and 18.6 MPa by autoclave tests. The results show that the corrosion resistance of Zr-1Nb alloy can be improved by adding Bi,and the more the Bi content is, the better the corrosion resistance is.TEM and EDS analyses on the microstructures of the alloys show that there are two types of second phase particles (SPPs), including ZrNbFe and β-Nb. The Bi contents have little effect on the type, size and amount of SPPs, 0.3%Bi can be completely dissolved in α-Zr matrix and has no influence on the solution content of Nb inα-Zr matrix. From the fracture and inner surface morphology of oxide films observed by SEM, it can be seen that the Bi dissolved in theα-Zr could noticeably slow down the microstructural evolution of oxide film, including the propagation of micro--cracks and the transformation from columnar grains to equiaxed grains in the oxide film.

Key words： Zr-1Nb alloy')" href="#">

Zr-1Nb alloy Bi corrosion resistance microstructure

收稿日期: 2012-06-27

基金资助:

国家自然科学基金项目50971084和国家先进压水堆重大专项项目2011ZX06004--023资助

作者简介: 朱莉, 女, 1988年生, 硕士生

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https://www.ams.org.cn/CN/10.3724/SP.J.1037.2012.00378 或 https://www.ams.org.cn/CN/Y2013/V49/I1/51

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