Mechanical properties and biodegradation of porous Zn-1Al alloy scaffolds

•Porous Zn-1Al alloy scaffolds were fabricated successfully.•Compressive yield strength of the porous Zn-1Al scaffolds is improved significantly.•The porous Zn-1Al scaffolds can effectively induce Ca-P precipitation in SBF.•The porous Zn-1Al scaffolds have a lower degradation rate than porous Zn sca...

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Bibliographic Details
Published in:Materials letters 2019-07, Vol.247, p.75-78
Main Authors: Zhao, Lichen, Wang, Xin, Wang, Tiebao, Xia, Yuhang, Cui, Chunxiang
Format: Article
Language:English
Subjects:
Aluminum
Biodegradability
Biodegradation
Biomaterials
Biomedical materials
Body fluids
Compressive strength
Dispersion hardening alloys
Dispersion strengthening
Grain size
In vitro methods and tests
Materials science
Mechanical properties
Porous materials
Porous Zn-Al alloy scaffold
Scaffolds
Size reduction
Solid solutions
Solution strengthening
Surgical implants
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Summary:•Porous Zn-1Al alloy scaffolds were fabricated successfully.•Compressive yield strength of the porous Zn-1Al scaffolds is improved significantly.•The porous Zn-1Al scaffolds can effectively induce Ca-P precipitation in SBF.•The porous Zn-1Al scaffolds have a lower degradation rate than porous Zn scaffolds. Biodegradable porous Zn-1Al alloy scaffolds were fabricated by air pressure infiltration method (APIM) for biomedical applications. The grains of porous Zn-1Al alloy scaffold are significantly refined due to the addition of Al. Tiny (Al) solid solution particles uniformly disperse in the grains of Zn matrix. Under the combined effect of grain size reduction and (Al) solid solution particles dispersion strengthening, the compressive yield strength of the porous alloy scaffolds is improved remarkably. During immersion tests in simulated body fluid (SBF), the porous Zn-1Al alloy scaffold can effectively induce Ca-P precipitation. In addition, the porous alloy scaffold has a lower degradation rate than the porous pure Zn scaffold in SBF.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2019.03.097