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Direct ink writing of porous Fe-HA metal-matrix composites (MMCs) with independently adjustable porosity and degradation rate for bone implant applications
- Source :
- Materials & Design, Vol 224, Iss , Pp 111319- (2022)
- Publication Year :
- 2022
- Publisher :
- Elsevier, 2022.
-
Abstract
- The porosity and degradation rate are critical properties of biodegradable bone implants, as they facilitate the regeneration of bone tissues and ensure a gradual load transfer. Herein, porous iron-hydroxyapatite (Fe-HA) metal-matrix composites (MMCs) with independently adjustable porosity and degradation rate are fabricated through a 3D printing technique, i.e., direct ink writing (DIW). HA micro powders exhibit a significant acceleration effect on the degradation rate, which act as a variable that is independent of the porosity to regulate the degradation rate. The mass losses of Fe-HA MMCs with the porosities of 30%, 50%, and 70% after 21d in-vitro immersion increased by 26%, 38%, and 93%, respectively, with the rising of HA content from 0 to 7.5 wt%. The novel porous Fe-HA MMCs have an adjustable and wide porosity-degradation rate range, yielding great potential to match with varied porosity and regeneration rate among various bones of different people.
Details
- Language :
- English
- ISSN :
- 02641275
- Volume :
- 224
- Issue :
- 111319-
- Database :
- Directory of Open Access Journals
- Journal :
- Materials & Design
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.f5f4c59a8dd34c908491abe8cc1304cc
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.matdes.2022.111319