一种Zr基非晶/晶体复合型核材料的力学性能与耐腐蚀性能的研究

doi:10.11889/j.0253-3219.2016.hjs.39.020501

Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (2): 20501-020501.doi: 10.11889/j.0253-3219.2016.hjs.39.020501

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles Next Articles

Enhanced mechanical properties and corrosion resistance of Zr-based amorphous/crystalline nuclear material

LUO Sheng, YANG Liang, GUO Guqing, GE Tao

College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Received:2015-11-16 Revised:2015-12-28 Online:2016-02-10 Published:2016-02-17
Supported by:
Supported by the National Natural Science Foundation of China (No.U1332112, No.51471088), the Fundamental Research Funds for the Central Universities (No.NE2015004), and the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions

Abstract

Abstract:

Background: Zr-based alloys have been widely used as nuclear materials. However, enhancement of the resistance of particle radiation, the mechanical properties, and the corrosion resistance in alloys are still required. Purpose: The aim is to develop a new Zr-based nuclear material of excellent mechanical properties and corrosion resistance. Methods: DC magnetron sputtering method was applied to preparing ZrCuNb ternary amorphous films precipitated upon the pure zirconium substrate. The structure of ZrCuNb films was characterized using scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and high-resolution transmission electron microscope. Testing on mechanical properties such as tensile experiment was performed for both the ZrCuNb films/Zr substrate (the composite material) and the corresponding Zr metal plate. Corrosion resistance was studied using potentiodynamic polarization measurements. Results: It is found that full amorphous structure in films could be obtained microalloying Nb in ZrCu alloy, such as Zr₅₃Cu₃₈Nb₉. In comparison with the Zr metal plate, the Zr substrate coated with Zr₅₃Cu₃₈Nb₉ film does not have higher hardness or Young's modulus, however, the composite material possesses relatively high tensile strength and in particular obviously larger plastic-strain range. The enhancement is caused by the difference in initiation mechanism of cracks between the amorphous film and Zr substrate that they propagate along different orientations. Cracks in the substrate and film interfere with each other, leading to a delayed catastrophic rupture. In addition, the composite material has a stronger corrosion resistance. Conclusion: Zr metal plate coated with ZrCuNb amorphous film is a novel composite material with excellent mechanical properties and good corrosion resistance, which has a potential application in the nuclear engineering.

Key words: Magnetron sputtering, ZrCuNb, Amorphous film, Mechanical properties, Corrosion resistance

CLC Number:

TL341

LUO Sheng, YANG Liang, GUO Guqing, GE Tao. Enhanced mechanical properties and corrosion resistance of Zr-based amorphous/crystalline nuclear material[J].Nuclear Techniques, 2016, 39(2): 20501-020501.

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Enhanced mechanical properties and corrosion resistance of Zr-based amorphous/crystalline nuclear material

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