Anomalous compliance of interpenetrating-phase composite of Ti and Mg synthesized by liquid metal dealloying

SCRIPTA MATERIALIA

卷:194

Article

Okulov, Ilya Vladimirovich^1,2,3,4  Wilmers, Jana⁵  Joo, Soo-Hyun⁶  Bargmann, Swantje^5,7  Kim, Hyoung Seop⁸  Kato, Hidemi¹ 

[1] Tohoku Univ, Inst Mat Res, Katahira 2-1-1, Sendai, Miyagi 9808577, Japan

[2] Ural Fed Univ, Inst Nat Sci, Ekaterinburg 620000, Russia

[3] Univ Bremen, Fac Prod Engn, Badgasteiner Str 1, Bremen, Germany

[4] Leibniz Inst Mat Engn IWT, Badgasteiner Str 3, D-28359 Bremen, Germany

[5] Univ Wuppertal, Chair Solid Mech, Gaussstr 20, D-42119 Wuppertal, Germany

[6] Dankook Univ, Dept Mat Sci & Engn, 119 Dandae Ro, Cheonan 31116, South Korea

[7] Univ Wuppertal, Wuppertal Ctr Smart Mat & Syst, D-42119 Wuppertal, Germany

[8] Pohang Univ Sci & Technol, Dept Mat Sci & Engn, 77 Cheongam Ro, Pohang 37673, South Korea

关键词: Low modulus;    Effective Properties;    Composite;    Porous;    Dealloying;   

DOI  :  10.1016/j.scriptamat.2020.113660

来源: Elsevier

【 摘 要 】

Low modulus biomaterials are in focus as potential candidates for biomedical implants ensuring a fast healing of hard tissues. The close match between elastic properties of an implant material and bone are critical to eliminate stress-shielding effect. In this study, we synthesized a low modulus interpenetrating-phase composite of Ti and Mg by liquid metal dealloying. Its Young's modulus value is in the range of that found for human bone which allows for biomedical applications of this material. Unexpectedly, the Young's modulus value of the composite (17.6 GPa) is several times lower than that of each individual constituent phases, namely, Mg (45 GPa) and Ti (110 GPa). Using micromechanical modelling, it is demonstrated that the origin of the anomalously low modulus can be related to a weakened interface between the constituents. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd.

【 授权许可】

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