Fabrication of Mg-Based Composites Reinforced by SiC Whisker Scaffolds with Three-Dimensional Interpenetrating-Phase Architecture and Their Mechanical Properties

doi:10.11900/0412.1961.2021.00259

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	Fabrication of Mg-Based Composites Reinforced by SiC Whisker Scaffolds with Three-Dimensional Interpenetrating-Phase Architecture and Their Mechanical Properties
	Gu Ruicheng 2,3; Zhang Jian 2; Zhang Mingyang 2; Liu Yanyan 2; Wang Shaogang 1; Mao Da 2; Liu Zengqian 2; Zhang Zhefeng 2
刊名	ACTA METALLURGICA SINICA
	2022-07-11
卷号	58 期号:7 页码:857-867
关键词	three-dimensional interpenetrating-phase architecture Mg-based composite SiC whisker fracture toughness toughening mechanism
ISSN号	0412-1961
DOI	10.11900/0412.1961.2021.00259
通讯作者	Liu Zengqian(zengqianliu@imr.ac.cn) ; Zhang Zhefeng(zhfzhang@imr.ac.cn)
英文摘要	Mg and Mg alloys, as important lightweight metal materials, have attracted great attention due to their excellent properties, such as low density, high specific strength, and good damping properties; however, their extensive applications are strictly limited by their low strength. The strength of Mg and Mg alloys can be effectively increased by introducing reinforcement phases into their matrices, i.e., via fabricating Mg-based composites. Nevertheless, the mechanical properties of Mg-based composites demonstrate a strong dependence on their microstructures. Here, new Mg-based composites reinforced by SiC whisker scaffolds with three-dimensional interpenetrating-phase architecture were fabricated through pressureless infiltration of the melt of pure Mg or AZ91D Mg alloy into the porous scaffolds of SiC whiskers. These whiskers were preferentially stacked in-plane within lamellae in the composites using gravityassisted sedimentation and subsequent densification during the fabrication process. The microstructures and mechanical properties of the composites, particularly their fracture toughness, were characterized and analyzed. The wettability between the SiC whisker scaffolds and the melt was improved by introducing surface reactions between them which was accomplished by a pre-oxidation treatment of the scaffolds before infiltration. The pre-oxidation temperature was adjusted to ensure an adequate filling of the scaffolds without voids while avoiding the formation of excessive reaction products. The resulting composites exhibited a high flexural strength with a certain extent of fracture toughness as evidenced by stable crack propagation with rising R-curve behavior. In comparison to pure Mg, the composites infiltrated with AZ91D Mg alloy as the matrix contained a larger amount of coarsened precipitates, resulting in apparent brittleness despite increased strength.
资助项目	National Key Research and Development Program of China[2020YFA0710404] ; National Natural Science Foundation of China[52173269] ; National Natural Science Foundation of China[51871216] ; National Natural Science Foundation of China[52101160] ; Liaoning Revitalization Talents Program ; Youth Innovation Promotion Association[2019191]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000816121700002
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Liaoning Revitalization Talents Program ; Youth Innovation Promotion Association
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174690]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu Zengqian; Zhang Zhefeng
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 3.Zhengzhou Univ, Henan Inst Adv Technol, Zhengzhou 950001, Peoples R China
推荐引用方式 GB/T 7714	Gu Ruicheng,Zhang Jian,Zhang Mingyang,et al. Fabrication of Mg-Based Composites Reinforced by SiC Whisker Scaffolds with Three-Dimensional Interpenetrating-Phase Architecture and Their Mechanical Properties[J]. ACTA METALLURGICA SINICA,2022,58(7):857-867.
APA	Gu Ruicheng.,Zhang Jian.,Zhang Mingyang.,Liu Yanyan.,Wang Shaogang.,...&Zhang Zhefeng.(2022).Fabrication of Mg-Based Composites Reinforced by SiC Whisker Scaffolds with Three-Dimensional Interpenetrating-Phase Architecture and Their Mechanical Properties.ACTA METALLURGICA SINICA,58(7),857-867.
MLA	Gu Ruicheng,et al."Fabrication of Mg-Based Composites Reinforced by SiC Whisker Scaffolds with Three-Dimensional Interpenetrating-Phase Architecture and Their Mechanical Properties".ACTA METALLURGICA SINICA 58.7(2022):857-867.