A novel Na<sub>2</sub>MoO<sub>4</sub>@CNT/Al-Zn-Mg-Cu composite with superior corrosion resistance and good mechanical properties: Effect of heat treatment

doi:10.1016/j.jmrt.2025.01.238

IMR OpenIR

	A novel Na₂MoO₄@CNT/Al-Zn-Mg-Cu composite with superior corrosion resistance and good mechanical properties: Effect of heat treatment
	Yang, Jie 1,2; Li, Qing 1,2; Xiao, Zhixiang 1,2; Wang, Zhengbin 1; Liu, Zhenyu 3; Xiao, Bolv 3; Ma, Zongyi 3; Zheng, Yugui 1
通讯作者	Wang, Zhengbin(zbwang12s@imr.ac.cn) ; Liu, Zhenyu(zyliu@imr.ac.cn) ; Zheng, Yugui(ygzheng@imr.ac.cn)
	2025-03-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	35 页码:2826-2839
摘要	The development of Al-Zn-Mg-Cu alloys and their composites with good corrosion resistance and mechanical properties is highly demanding yet remains challenging. In this study, a new strategy of incorporating Na2MoO4 precipitants into bulk Al-Zn-Mg-Cu alloys using the inner cavity of opened carbon nanotubes (CNTs) combined with different heat treatments are employed to develop a novel Na2MoO4@CNT/7075 composite with superior corrosion resistance, high strength and good plasticity. The results show that as compared to the peak aging (PA) treatment, double aging (DA) and retrogression and re-aging (RRA) treatments can result in wider precipitationfree zone in the grain boundary with slightly larger precipitate phases. As a result, the DA- and RRA-treated Na2MoO4@CNT/7075 composite has good mechanical properties with high strength and relatively good elongation. Moreover, all the Na2MoO4@CNT/7075 composites have extraordinary corrosion resistance with a low corrosion rate (similar to 0.01 mm/y) in 0.6 mol/L NaCl solution and the highest resistance to intergranular corrosion (IGC depth of <5 mu m) and exfoliation corrosion (EXCO rating of level N), regardless of the heat treatment. This is experimentally proved to originate from the pronounced surface enrichment of the Na2MoO4 precipitant released from exposed CNTs forming a protective surface film, which is independent of heat treatment, and therefore indicates that the aforementioned new strategy is highly effective to enhance corrosion resistance under different heat treatments. This work demonstrates that high-performance Al-Zn-Mg-Cu matrix composites with superior corrosion resistance and good mechanical properties can be developed by combining the new corrosionresistance strategy and proper heat treatments.
关键词	Na2MoO4@CNT/7075 composite Heat treatment Corrosion resistance Mechanical properties Carbon nanotubes
资助者	IMR Innovation Fund ; Youth Innovation Promotion Association CAS ; Young Elite Scientist Sponsorship Program Cast from China Association for Science and Technology ; National Natural Science Foundation of China
DOI	10.1016/j.jmrt.2025.01.238
收录类别	SCI
语种	英语
资助项目	IMR Innovation Fund[2024-ZD02] ; Youth Innovation Promotion Association CAS[2023200] ; Young Elite Scientist Sponsorship Program Cast from China Association for Science and Technology[YESS20210013] ; National Natural Science Foundation of China[51931009] ; National Natural Science Foundation of China[52120105001]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001423156500001
出版者	ELSEVIER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180064
专题	中国科学院金属研究所
通讯作者	Wang, Zhengbin; Liu, Zhenyu; Zheng, Yugui
作者单位	1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, Jie,Li, Qing,Xiao, Zhixiang,et al. A novel Na₂MoO₄@CNT/Al-Zn-Mg-Cu composite with superior corrosion resistance and good mechanical properties: Effect of heat treatment[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2025,35:2826-2839.
APA	Yang, Jie.,Li, Qing.,Xiao, Zhixiang.,Wang, Zhengbin.,Liu, Zhenyu.,...&Zheng, Yugui.(2025).A novel Na₂MoO₄@CNT/Al-Zn-Mg-Cu composite with superior corrosion resistance and good mechanical properties: Effect of heat treatment.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,35,2826-2839.
MLA	Yang, Jie,et al."A novel Na₂MoO₄@CNT/Al-Zn-Mg-Cu composite with superior corrosion resistance and good mechanical properties: Effect of heat treatment".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 35(2025):2826-2839.