Corrosion onset associated with the reinforcement and secondary phases in B4C-6061Al neutron absorber material in H3BO3 solution

被引：25
|
作者：
Zhou, Y. T. [1 ]
Zan, Y. N. [1 ]
Wei, X. X. [1 ]
Yang, B. [1 ]
Zhang, B. [1 ]
Zheng, S. J. [1 ]
Shao, X. H. [1 ]
Dong, J. H. [2 ]
Ma, X. L. [1 ]
Xiao, B. L. [1 ]
Wang, Q. Z. [3 ]
Ma, Z. Y. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, Environm Corros Ctr, 62 Wencui Rd, Shenyang 110016, Liaoning, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
来源：
CORROSION SCIENCE | 2019年 / 153卷
基金：
中国国家自然科学基金;
关键词：
Metal matrix composites; Aluminium; TEM; Pitting corrosion; Interfaces; ALUMINUM-ALLOY; INTERGRANULAR CORROSION; PITTING CORROSION; BEHAVIOR; COPPER; DISSOLUTION; COMPOSITE; MECHANISM; PARTICLE; DESIGN;
D O I：
10.1016/j.corsci.2019.03.042
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructures in B4C-6061Al composite hot-pressed at different temperatures (560 degrees C, 620 degrees C) are characterized, and the corrosion behavior of the materials is studied using electrochemical tests and quasi in-situ TEM observations. The composite fabricated at 620 degrees C is composed of more matrix-reinforcement reaction products (Al3BC at the interfaces and MgB2 in the alloy matrix). Corrosion occurred slightly in boric acid but severely in Cl--containing solution. The B4C/Al interface in both samples is preferentially attacked and the MgB2 dispersions in the high-temperature-pressed composite remarkably promoted the pitting. Dealloying of Mg2Si precipitate does not obviously deteriorate the corrosion resistance of the composite.
引用
收藏
页码：74 / 84
页数：11
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