Characterization of newly developed zinc composite with the content of 8 wt.% of hydroxyapatite particles processed by extrusion

0532015 - FZÚ 2021 RIV CH eng J - Journal Article
Pinc, Jan - Čapek, Jaroslav - Hybášek, V. - Průša, F. - Hosová, K. - Maňák, Jan - Vojtěch, D.
Characterization of newly developed zinc composite with the content of 8 wt.% of hydroxyapatite particles processed by extrusion.
Materials. Roč. 13, č. 7 (2020), s. 1-15, č. článku 1716. E-ISSN 1996-1944
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA18-06110S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : zinc * metal-matrix composite * biodegradable metals
OECD category: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impact factor: 3.623, year: 2020
Method of publishing: Open access

Zinc and its alloys belong to a group of biodegradable materials, which can be potentially used for the preparation of temporary orthopedic implants. The research of biodegradable zinc materials revealed a lot of limitations, however, the new processing approaches of those materials can enhance their properties, which are insufficient for now. In this study, the zinc composite with 8 wt.% of hydroxyapatite (Zn/HA8) prepared for the first time by extrusion process was characterized from the point of view of the structural, mechanical and corrosion properties. The extrusion process led to good integrity of the interfaces between the zinc and hydroxyapatite particles. Mechanical behavior confirmed the role of hydroxyapatite as a defect in the material structure, which led to a decrease of the Zn/HA8 mechanical properties by approximately 30% (compressive yield strength (CYS) = 154 MPa Zn, 113 MPa Zn/HA8). Despite that, the Zn/HA8 composite showed sufficient mechanical properties for cancellous bone replacement and reached the lower limit for cortical bone. Additionally, the presence of hydroxyapatite caused the preferential precipitation of hydroxyapatite (HA) from the solution and can lead to a significant enhancement of the tissue/implant interface interactions.
Permanent Link: http://hdl.handle.net/11104/0310621