姚怀,熊毅,刘亚,李欢,师惠娜.Mg-0.5Zr-1.8Zn-xGd生物镁合金的组织与性能[J].稀有金属材料与工程,2020,49(12):4271~4279.[Yao Huai,Xiong Yi,Liu Ya,Li Huan,Shi Huina.Microstructures and properties of Mg-0.5Zr-1.8Zn-xGd bio-magnesium alloys[J].Rare Metal Materials and Engineering,2020,49(12):4271~4279.]
Mg-0.5Zr-1.8Zn-xGd生物镁合金的组织与性能
投稿时间:2019-12-23  修订日期:2020-01-13
中文关键词:  镁合金  微观组织  生物腐蚀性能  力学性能
基金项目:河南省高等学校重点科研项目(20A430010);国家自然科学基金资助项目(项目号U1804146);河南省高校科技创新人才支持计划项目(项目号17HASTIT026),国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      在较高的熔炼温度(780±5 ℃)下,研究了Gd含量对铸态Mg-0.5Zr-1.8Zn-xGd生物镁合金组织、力学性能及耐腐蚀性能的影响。结果表明:Gd含量在0-2.5wt%时,合金的晶粒尺寸随Gd含量的增加逐渐减小,未含Gd合金主要由α-Mg和少量分散的微米级Zr颗粒组成,而含Gd合金则主要由α-Mg和不同形貌的(Mg, Zn)3Gd相组成。合金的力学性能随Gd含量的增加先升高后降低,Gd含量为1.5wt%时,合金具有较好的力学性能。与此同时,合金的耐腐蚀性能也随Gd含量的增加先增强后减弱,Gd含量为1.5wt%时,分布均匀且尺寸细小的网状第二相使其具有较好的耐腐蚀性能,在120 h的浸泡实验中,静态腐蚀速率为0.801±0.04 mm/a,腐蚀形貌较为均匀。
Microstructures and properties of Mg-0.5Zr-1.8Zn-xGd bio-magnesium alloys
英文关键词:magnesium alloys  microstructure  biocorrosion property  mechanical property
英文摘要:
      The effects of Gd content on the microstructure, mechanical properties and corrosion resistance of as-cast Mg-0.5Zr-1.8Zn-xGd bio-magnesium alloy were studied at high melting temperature (780±5 ℃). The results show that the grain size of the alloy decreases with the increase of Gd content at the range of 0-2.5wt%. The alloy without Gd is mainly composed of α-Mg and a small amount of dispersed micron Zr particles, while the alloy containing Gd is mainly composed of α-Mg and different morphologies of (Mg, Zn)3Gd phase. The mechanical properties of the alloy increase at first and then decrease with the increase of Gd content. When the Gd content is 1.5wt%, the alloy has better mechanical properties. At the same time, the corrosion resistance increases at first and then decreases with the increase of Gd content. The uniformly distributed and fine reticulated second phase at 1.5wt% Gd content makes it better corrosion resistance. In the immersion test for 120 h, the static corrosion rate is 0.801±0.04 mm/a, and the corrosion morphology is relative uniform.
作者单位E-mail
姚怀 河南科技大学材料科学与工程学院 yaohuai@163.com 
熊毅 河南科技大学材料科学与工程学院 xy_hbdy@163.com 
刘亚 河南科技大学材料科学与工程学院 liuya_021@163.com 
李欢 河南科技大学材料科学与工程学院 hnlihuan@126.com 
师惠娜 河南科技大学材料科学与工程学院 shn1995@126.com 
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