Regensburg 2022 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MM: Fachverband Metall- und Materialphysik
MM 32: Nanomaterials: Surface Effects
MM 32.3: Talk
Thursday, September 8, 2022, 12:15–12:30, H45
Hierarchical materials mimicking mechanical behaviour of human bone synthesized by additive manufacturing and dealloying. — •Aleksandr Filimonov1, Lutz Mädler1,2, and Ilya Okulov1,2 — 1Faculty of Production Engineering, University of Bremen, Badgasteiner Str. 1, 28359 Bremen, Germany — 2Leibniz Institute for Materials Engineering-IWT, Badgasteiner Str. 3, 28359 Bremen, Germany
The close match between the elastic properties of an implant material and bone is crucial to avoid the stress-shielding effect. Therefore, low modulus biomaterials are desirable for biomedical implants that ensure rapid healing of hard tissue. Due to its complex hierarchical structure, bone features moderate strength similar to some metals and low elastic modulus like polymers. Implant materials for bone fixation should be several times stronger compared with that of bone. However, the general relation between strength and elastic modulus of man-made materials suggest that stronger materials typically possess higher elastic modulus including metals - usual candidates for bone fixation. In this work, novel hierarchical metal-polymer composite materials "breaking" the general trend between strength and elastic modulus were synthesized by additive manufacturing and liquid metal dealloying. The large digital porosity of metallic scaffold was synthesized by additive manufacturing and its fine porosity is a result of materials self-organization upon dealloying. The results suggest that these novel composite materials mimicking the structure and mechanical behaviour of bone are potential candidates for biomedical applications.