Abstract

The biodegradation behavior and mechanical properties of Mg-Sr-Y alloys were systematically investigated for the medical application. The alloy (Mg-0.3Sr-0.5Y) exhibits a comparable UTS as 111.53 MPa and shows a general uniform degradation behavior with low corrosion rate as only 0.823 mm y−1 in Hanks’ solution. The simultaneous solid solution of Y in α-Mg phase and in Mg17Sr2 phase reduces the micro-galvanic corrosion. Additionally, the formation of a compact composite film of Mg(OH)2, Y2O3 and Sr-substituted phosphate (Sr-HA) delivers the protection for the matrix. Low corrosion rate, fine precipitates and dispersed Y rich-zones, which hinder the corrosion propagation, further guarantees a uniform degradation behavior. While, with increasing Sr content, the corrosion resistance is deteriorated because of the formed continuous distribution of Mg17Sr2 along grain boundaries. By tailoring composition and structure, Mg-Sr-Y alloys with balanced mechanical and bio-degradation properties can be promising for the bio-applications.

Details

Title
Controllable degradation behavior of Mg-Sr-Y alloys for the bio-applications
Author
Li, Yingying 1 ; Yuan, Yuan 2   VIAFID ORCID Logo  ; Wang, Jun 1 ; Wu, Liang 1   VIAFID ORCID Logo  ; Cao, Fuyong 3 ; Zhang, Ligang 4 ; Pan, Fusheng 5 

1  Chongqing University, National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing, China (GRID:grid.190737.b) (ISNI:0000 0001 0154 0904) 
2  Chongqing University, National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing, China (GRID:grid.190737.b) (ISNI:0000 0001 0154 0904); Central South University, School of Materials Science and Engineering, Changsha, China (GRID:grid.216417.7) (ISNI:0000 0001 0379 7164); Chongqing University, International Joint Laboratory for Light Alloys (Ministry of Education), Chongqing, China (GRID:grid.190737.b) (ISNI:0000 0001 0154 0904) 
3  Xiamen University, Center for Marine Materials Corrosion and Protection College of Materials, Xiamen, China (GRID:grid.12955.3a) (ISNI:0000 0001 2264 7233) 
4  Central South University, School of Materials Science and Engineering, Changsha, China (GRID:grid.216417.7) (ISNI:0000 0001 0379 7164) 
5  Chongqing University, National Engineering Research Center for Magnesium Alloys, College of Materials Science and Engineering, Chongqing, China (GRID:grid.190737.b) (ISNI:0000 0001 0154 0904); Chongqing University, International Joint Laboratory for Light Alloys (Ministry of Education), Chongqing, China (GRID:grid.190737.b) (ISNI:0000 0001 0154 0904) 
Pages
45
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
23972106
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41529-023-00366-1
ProQuest document ID
2819770360
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.