| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
3D Printing of Biomaterials and Devices
|
| Presentation Title |
Additively Manufactured Biodegradable ZnMg Alloy for Cortical-Bone Mimicking Load-Bearing Applications |
| Author(s) |
Yageng Li, Yuzhe Zheng, Luning Wang |
| On-Site Speaker (Planned) |
Yageng Li |
| Abstract Scope |
Additively manufactured (AM) biodegradable zinc alloys are emerging as promising porous bone-substituting materials. While AM zinc (Zn) alloy porous scaffolds mimicking the mechanical properties of trabecular bone have been previously reported, mimicking the mechanical properties of cortical bone remains a formidable challenge. We developed AM Zn-Mg alloy to overcome this challenge. We used laser powder bed fusion to process Zn-Mg alloy. The compressive properties of the solid Zn-Mg specimens greatly exceeded their tensile properties, with a compressive yield strength of up to 601 MPa and an ultimate strain of >60%. We then designed and fabricated functionally graded porous structures with a solid core and achieved cortical bone-mimicking mechanical properties. The biodegradation rates of the Zn-Mg specimens were lower than those of pure Zn. The Zn-Mg specimens also exhibited improved biocompatibility as compared to pure Zn. These results mark major progress in the development of AM porous biodegradable metallic bone substitutes. |