Corrosion behavior of biodegradable Mg-based alloys via femtosecond laser surface melting

被引:57
|
作者
Park, Jaeho [1 ]
Han, Hyung-Seop [2 ]
Park, Jimin [1 ]
Seo, Hyunseon [1 ]
Edwards, James [2 ]
Kim, Yu-Chan [1 ]
Ok, Myoung-Ryul [1 ]
Seok, Hyun-Kwang [1 ,3 ]
Jeon, Hojeong [1 ,3 ]
机构
[1] Korea Inst Sci & Technol, Ctr Biomat, Seoul 02792, South Korea
[2] Univ Oxford, Nuffield Dept Orthopaed Rheumatol & Musculoskelet, Oxford OX3 7LD, England
[3] Korea Univ Sci & Technol, KIST Sch, Div Biomed Sci & Technol, Seoul 02792, South Korea
关键词
Biodegradable metal; Mg alloy; Laser surface modification; Femtosecond laser; Corrosion property; MAGNESIUM ALLOY; MECHANICAL-PROPERTIES; WEAR-RESISTANCE; IN-VITRO; MICROSTRUCTURE; AL; DEGRADATION; REFINEMENT; STEEL; ZE41;
D O I
10.1016/j.apsusc.2018.04.088
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The effects of femtosecond (fs) laser treatment on a biocompatible Mg-Ca-Zn alloy were systemically analyzed. The fs laser altered the surface microstructure of the Mg-Ca-Zn alloy, resulting in reduced corrosion through localized melting and rapid solidification. Treatment with appropriate laser energy (500 Hz) generated an exceptionally thin modified layer (similar to 2 mu m) with a uniformly refined microstructure. Laser-induced remelting of the secondary phase reduced galvanic corrosion and prevented the occurrence of pitting corrosion, resulting in overall reduced corrosion. Results reveal that the corrosive nature of the biodegradable Mg alloy can be controlled through surface modification by a fs laser. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码:424 / 434
页数:11
相关论文
共 50 条