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作者:

Waqas, Muhammad (Waqas, Muhammad.) | He, Dingyong (He, Dingyong.) | He, Chengxing (He, Chengxing.) | Tan, Zhen (Tan, Zhen.) | Wu, Xu (Wu, Xu.) | Ji, Gang (Ji, Gang.) | Guo, Xingye (Guo, Xingye.)

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EI Scopus SCIE

摘要:

Zinc (Zn) alloys have recently revolutionized and shown promising usage for degradable biomedical implants (BMI). However, due to the low strength of pure Zn, its application in the biomedical industry was limited. In the current research, an innovative biodegradable Zn-0.4Li-0.4Cu alloy produced by laser powder bed fusion (LPBF) with good mechanical properties was investigated. The Zn-0.4Li-0.4Cu alloy showed superior mechanical properties (tensile strength at 296 MPa, yield strength at 260 MPa, and after heat treatment elongation at 8.3 %), a record for biodegradable Zn alloys, as a consequence of grain refinement, second-phase precipitation of intermetallic compounds, and solid solution strengthening. The impacts of Cu and Li on the microstructures, mechanical behaviors, corrosive behavior and deterioration rate of the Zn-0.4Li-0.4Cu alloy were studied. The addition of Cu and inherent fast-cooling rate of the LPBF process are favorable for promoting the nucleation events, leading to the refinement of grains. In addition, the formation of the second-phase precipitates (CuZn4 and ZnLi4) in the matrix was founded to further improve the mechanical properties. Moreover, the alloy showed a consistent degradation manner and a suitable degradation rate of 0.023 mm/year. Based on the findings shown above, the biodegradable Zn-0.4Li-0.4Cu alloy can be a potential candidate for vascular stents and medical applications due to its excellent mechanical properties and adequate degrading behavior.

关键词:

Corrosion Mechanical properties Laser powder bed fusion Biodegradable Zn-alloy

作者机构:

  • [ 1 ] [Waqas, Muhammad]Beijing Univ Technol, Coll Mat Sci & Engn, 100 Ping Le yuan, Beijing 100124, Peoples R China
  • [ 2 ] [He, Dingyong]Beijing Univ Technol, Coll Mat Sci & Engn, 100 Ping Le yuan, Beijing 100124, Peoples R China
  • [ 3 ] [Tan, Zhen]Beijing Univ Technol, Coll Mat Sci & Engn, 100 Ping Le yuan, Beijing 100124, Peoples R China
  • [ 4 ] [Wu, Xu]Beijing Univ Technol, Coll Mat Sci & Engn, 100 Ping Le yuan, Beijing 100124, Peoples R China
  • [ 5 ] [Guo, Xingye]Beijing Univ Technol, Coll Mat Sci & Engn, 100 Ping Le yuan, Beijing 100124, Peoples R China
  • [ 6 ] [He, Dingyong]Beijing Engn Res Ctr Ecomat & LCA, 100 Ping Le yuan, Beijing 100124, Peoples R China
  • [ 7 ] [He, Chengxing]Yale Univ, Sch Engn & Appl Sci, Dept Chem & Environm Engn, New Haven, CT 06520 USA
  • [ 8 ] [He, Chengxing]Yale Univ, Energy Sci Inst, West Haven, CT 06516 USA
  • [ 9 ] [Ji, Gang]Univ Lille, Unite Mat & Transformat, CNRS, INRAE,Cent Lille,UMR 8207, Lille, France

通讯作者信息:

  • [Guo, Xingye]Beijing Univ Technol, Coll Mat Sci & Engn, 100 Ping Le yuan, Beijing 100124, Peoples R China;;

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来源 :

JOURNAL OF ALLOYS AND COMPOUNDS

ISSN: 0925-8388

年份: 2024

卷: 1002

6 . 2 0 0

JCR@2022

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SCOPUS被引频次: 2

ESI高被引论文在榜: 0 展开所有

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