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| 1 | Recent research and progress of biodegradable zinc alloys and composites for biomedical applications: Biomechanical and biocorrosion perspectives显示文摘Biodegradable metals(BMs)gradually degrade in vivo by releasing corrosion products once exposed to the physiological environment in the body.Complete dissolution of biodegradable implants assists tissue healing,with no implant residues in the surrounding tissues.In recent years,three classes of BMs have been extensively investigated,including magnesium(Mg)-based,iron(Fe)-based,and zinc(Zn)-based BMs.Among these three BMs,Mg-based materials have undergone the most clinical trials.However,Mg-based BMs generally exhibit faster degradation rates,which may not match the healing periods for bone tissue,whereas Fe-based BMs exhibit slower and less complete in vivo degradation.Zn-based BMs are now considered a new class of BMs due to their intermediate degradation rates,which fall between those of Mg-based BMs and Fe-based BMs,thus requiring extensive research to validate their suitability for biomedical applications.In the present study,recent research and development on Zn-based BMs are reviewed in conjunction with discussion of their advantages and limitations in relation to existing BMs.The underlying roles of alloy composition,microstructure,and processing technique on the mechanical and corrosion properties of Zn-based BMs are also discussed. | Humayun Kabir Khurram Munir Cuie Wen Yuncang Li | 2021 | Bioactive Materials2021，6，3： | 18 |
| 2 | 生物医用锌基合金性能研究进展显示文摘医用金属植入体已广泛应用于临床骨组织修复中,但是随着临床手术案例的积累,发现不锈钢、钛、传统生物金属材料在生物体内长期存在会造成应力屏蔽、组织排异发炎等症状,二次手术会给患者带来极大痛苦。近年来,可降解金属植入体材料的概念被提出并引起重视,由可降解金属制备的植入体在生物体组织中可被吸收分解,并促进血管组织愈合与骨组织再生,被视为新一代医用植入体材料。锌合金由于其优异的降解特性及生物相容性成为近年来的研究热点,在血管腔内支架、骨科及口腔科内固定材料领域拥有巨大的应用潜力。锌合金发展迅速,须及时进行全面总结。总结归纳目前医用锌合金的主要制备方式、材料力学性能、降解行为和生物相容性。基于大量的数据分析与归纳,发现在锌合金中添加Li、Mg元素可细化晶粒,显著提高锌合金强度,添加Mn元素则可在塑性变形中细化晶粒,可提高锌合金的延伸率。与纯锌相比,锌合金中的Zn-(Fe、Cu、Ag)析出相与Zn基体形成的微电池作用提高了锌合金的降解速率。针对新型锌合金成分及先进制备工艺,提出以材料基因工程,指导适用于增材制造的三元高强锌合金体系开发,在提高力学性能的基础上匹配锌合金的降解速率和生物相容性,直接获得具有定制化结构的锌合金近终成型植入体。在系统性汇总的基础上,从性能、开发以及增材制造三个方面展望未来发展方向。 | 张梓浩 刘宇 窦新雨 海宝 刘晓光 庞晓露 张百成 祝斌 | 2022 | 中国表面工程2022，35，6： | 0 |
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