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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 Ruicheng1,2; Zhang Jian2; Zhang Mingyang2; Liu Yanyan2; Wang Shaogang3; Mao Da2; Liu Zengqian2; Zhang Zhefeng2
Corresponding AuthorLiu Zengqian(zengqianliu@imr.ac.cn) ; Zhang Zhefeng(zhfzhang@imr.ac.cn)
2022-07-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume58Issue:7Pages:857-867
AbstractMg 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.
Keywordthree-dimensional interpenetrating-phase architecture Mg-based composite SiC whisker fracture toughness toughening mechanism
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; Liaoning Revitalization Talents Program ; Youth Innovation Promotion Association
DOI10.11900/0412.1961.2021.00259
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000816121700002
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174691
Collection中国科学院金属研究所
Corresponding AuthorLiu Zengqian; Zhang Zhefeng
Affiliation1.Zhengzhou Univ, Henan Inst Adv Technol, Zhengzhou 950001, Peoples R China
2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
Recommended Citation
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.
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