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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Mg-(4-x)Nd-xGd-Sr-Zn-Zr生物镁合金的组织、力学和腐蚀性能*
, PP. 979-988
Keywords: 生物镁合金,显微组织,力学性能,腐蚀性能
Abstract:
采用重力浇铸法制备了Mg-(4-x)Nd-xGd-0.3Sr-0.2Zn-0.4Zr(质量分数,%,x=0,1,2,3)4组合金,并对其进行了固溶+人工时效热处理(T6).利用XRD对铸态合金的物相进行分析,采用SEM观察合金的组织,采用拉伸试验机和显微硬度计测试合金的室温拉伸性能和显微硬度,采用失重法评价合金在模拟体液中的腐蚀速率,并对腐蚀形貌进行观察.结果表明,随着Gd部分取代Nd,铸态合金的组织先细化后又变粗,第二相含量逐渐减少,室温力学性能和耐蚀性能均提高.而对于T6态合金,强度和硬度均比不含Gd的合金要低,耐蚀性能则优于不含Gd的合金.
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