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High plastic Zr–Cu–Fe–Al–Nb bulk metallic glasses for biomedical applications 被引量:1
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作者 Shu-shen Wang Yun-liang Wang +2 位作者 Yi-dong Wu Tan Wang Xi-dong Hui 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2015年第6期648-653,共6页
Four Zr–Cu–Fe–Al-based bulk metallic glasses(BMGs) with Zr contents greater than 65at% and minor additions of Nb were designed and prepared. The glass forming abilities, thermal stabilities, mechanical properties... Four Zr–Cu–Fe–Al-based bulk metallic glasses(BMGs) with Zr contents greater than 65at% and minor additions of Nb were designed and prepared. The glass forming abilities, thermal stabilities, mechanical properties, and corrosion resistance properties of the prepared BMGs were investigated. These BMGs exhibit moderate glass forming abilities along with superior fracture and yield strengths compared to previously reported Zr–Cu–Fe–Al BMGs. Specifically, the addition of Nb into this quaternary system remarkably increases the plastic strain to 27.5%, which is related to the high Poisson's ratio and low Young's and shear moduli. The Nb-bearing BMGs also exhibit a lower corrosion current density by about one order of magnitude and a wider passive region than 316 L steel in phosphate buffer solution(PBS, pH 7.4). The combination of the optimized composition with high deformation ability, low Young's modulus, and excellent corrosion resistance properties indicates that this kind of BMG is promising for biomedical applications. 展开更多
关键词 metallic glasses biomedical materials mechanical properties corrosion resistance zirconium content niobium addition
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In Vitro Evaluation of the Feasibility of Commercial Zn Alloys as Biodegradable Metals 被引量:28
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作者 C.Wang H.T.Yang +1 位作者 X.Li Y.F.Zheng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2016年第9期909-918,共10页
In this work, three widely used commercial Zn alloys (ZA4-1, ZA4-3, ZA6-1 ) were purchased and pre- pared by hot extrusion at 200℃. The microstructure, mechanical properties, corrosion behaviors, biocompatibility a... In this work, three widely used commercial Zn alloys (ZA4-1, ZA4-3, ZA6-1 ) were purchased and pre- pared by hot extrusion at 200℃. The microstructure, mechanical properties, corrosion behaviors, biocompatibility and hemocompatibility of Zn alloys were studied with pure Zn as control, Commercial Zn alloys demonstrated increased strength and superb elongation compared with pure Zn. Accelerated corrosion rates and uniform corrosion morphologies were observed in terms of commercial Zn alloys due to galvanic effects between Zn matrix and α-Al phases. 100% extracts of ZA4-1 and ZA6-1 alloys showed mild cytotoxicity while 50% extracts of all samples displayed good biocompatibility. Retardant cell cycle and inhibited stress fibers expression were observed induced by high concentration of Zn^2+ releasing during corrosion. The hemolysis ratios of Zn alloys were lower than 1% while the adhered platelets showed slightly activated morphologies. In general, commercial Zn alloys possess promising mechanical properties, appropriate corrosion rates, significantly improved biocompatibility and good hemocompatibility in comparison to pure Zn. It is feasible to develop biodegradable metals based on commercial Zn alloys. 展开更多
关键词 Commercial Zn alloys Biodegradable metals Mechanical properties corrosion behaviors Cytotoxicity Hemocompatibility
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