Degradation behavior of Ca-Mg-Zn intermetallic compounds for use as biodegradable implant materials
Degradation behavior of Ca-Mg-Zn intermetallic compounds for use as biodegradable implant materials
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DOI：
10.1016/j.msec.2014.08.037
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发表时间：
2014-11-01
影响因子：
7.9
通讯作者：
Nakano, Takayoshi
中科院分区：
文献类型：
--
作者：
Hagihara, Koji;Shakudo, Shuhei;Nakano, Takayoshi
With the goal of developing new biodegradable implant materials, we have investigated the degradation behavior of (Ca, Mg)-based intermetallic compounds. The degradation behavior of the compounds within the Ca-Mg-Zn system was roughly classified into four groups, and their behaviors were strongly influenced by the compositions of the compounds. For example, the Ca3MgxZn((15) (-) x) compound exhibited a large solubility region with varying the Mg/Zn ratio, and the Ca3Mg12Zn3 phase alloy with the lowest Zn content was rapidly broken apart within 6 h of immersion. Alternatively, the Ca3Mg4.6Zn10.4 phase alloy with the highest Zn content retained the bulk shape even after 250 h of immersion. These varying degradation behaviors were ascribed to the difference in the formability of Zn oxide as a protective layer against corrosion on the specimen surfaces, depending on the Zn content. The gained results suggest that there is a feasibility on developing new biodegradable materials based on intermetallic compounds in which the degradation rate can be controlled by their compositions. (C) 2014 Elsevier B.V. All rights reserved.
