Effect of Al2O3 on the Mechanical Properties of(B4C+Al2O3)/Al Neutron Absorbing Materials

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外文摘要：B4C/Al composites are widely utilized as neutron absorbing materials for the storage and transportation of spent nuclear fuel.In order to improve the high-temperature mechanical properties of B4C/Al composites,in-situ nano-Al2O3 was introduced utilizing oxide on Al powder surface.In this study,the Al2O3 content was adjusted by utilizing spheroid Al powder with varying diameters,thereby investigating the impact of Al2O3 content on the tensile properties of(B4C+Al2O3)/Al compos-ites.It was found that the pinning effect of Al2O3 on the grain boundaries could hinder the recovery of dislocations and lead to dislocation accumulation at high temperature.As the result,with the increase in Al2O3 content and the decrease in grain size,the high-temperature strength of the composites increased significantly.The finest Al powder used in this investigation had a diameter of 1.4 μm,whereas the resultant composite exhibited a maximum strength of 251 MPa at room temperature and 133 MPa at 350 ℃,surpassing that of traditional B4C/Al composites.

外文关键词：

Al matrix compositesNeutron absorbing materials(B4C+Al2O3)/Al compositesHigh-temperature strength

作者：

J.X.Cai、B.M.Shi、N.Li、Y.Liu、Z.G.Zhang、Y.N.Zan、Q.Z.Wang、B.L.Xiao、Z.Y.Ma

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作者单位：

Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

Department of Materials Science,School of Mechanical Engineering,Shenyang University,Shenyang 110044,China

Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

Nuclear Equipment Division,Beijing Institute of Nuclear Engineering,China Nuclear Power Engineering Co.,Ltd.,Beijing 100840,China

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基金：

National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaCNNC Science Fund for Talented Young ScholarsInstitute of Metal Research(IMR)Innovation FundNatural Science Foundation of Liaoning ProvinceYoung Elite Scientists Sponsorship Program by CAST

项目编号：

2023YFB371060152203385521710562021-ZD022022-BS-009YESS20220225

出版年：

2024

DOI：

10.1007/s40195-024-01711-2

金属学报(英文版)

中国金属学会

金属学报(英文版)

CSTPCD

影响因子：0.77

ISSN：1006-7191

年,卷(期)：2024.37(8)