Corrosion, mechanical and biological properties of biodegradable WE43 alloy modified by Al ion implantation

被引：18
作者：
Li, Lianhui [1 ,2 ]
Qi, Fugang [3 ]
Zhang, Zhiqiang [1 ,2 ]
Lu, Liwei [4 ]
Ouyang, Xiaoping [3 ]
机构：
[1] Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110819, Peoples R China
[2] Northeastern Univ, Engn Res Ctr Adv Mat Preparing Technol, Minist Educ, Shenyang 110819, Peoples R China
[3] Xiangtan Univ, Sch Mat Sci & Engn, Xiangtan 411105, Peoples R China
[4] Hunan Univ Sci & Technol, Sch Mat Sci & Engn, Xiangtan 411201, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2023年 / 49卷 / 03期
关键词：
Mg alloy; Al ion implantation; Corrosion resistance; Mechanical properties; Biocompatibility; SIMULATED BODY-FLUID; MAGNESIUM ALLOYS; CARDIOVASCULAR STENTS; IN-VITRO; MG; CYTOCOMPATIBILITY; BIOCOMPATIBILITY; DEGRADATION; RESISTANCE; BEHAVIOR;
D O I：
10.1016/j.ceramint.2022.10.056
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A high-energy metal vapor vacuum arc (MEVVA) ion source was used to implant aluminum (Al) ions into the WE43 alloy (Al-WE43) at a dose of 1 symbolscript 1016 symbolscript 2, and the structural composition, mechanical properties, corrosion resistance, and biocompatibility of the alloy before and after implantation were systematically studied. The results showed that an Al2O3/Al thin film was formed on the surface of the WE43 alloy after Al ion im-plantation, and the dense film caused the corrosion current density (Icorr) of the alloy to decrease from 140.2 symbolscript 9.3 to 17.9 symbolscript 6.1 symbolscript 2. Nanoindentation experiments revealed that the elastic model (EIT) and nano-hardness (HIT) of the Al-WE43 alloy were significantly improved due to the surface lattice distortion caused by Al ion implantation. A diluted extract of the Al-WE43 alloy showed higher cell activity, anti-hemolysis and anti-coagulation properties than that of the WE43 alloy. In general, the Al-WE43 alloy can be considered as a promising biodegradable metallic material for cardiovascular stent applications.
引用
收藏
页码：5327 / 5334
页数：8
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