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超常塑性Mg77Cu12Zn5Y6块体金属玻璃基内生复合材料
  • 期刊名称：科学通报，51(2006):224-229
  • 时间：0
  • 分类：TQ171.71[化学工程—玻璃工业;化学工程—硅酸盐工业] V257[一般工业技术—材料科学与工程;航空宇航科学与技术—航空宇航制造工程;航空宇航科学技术]
  • 作者机构：[1]北京科技大学新金属材料国家重点实验室,北京100083
  • 相关基金：本工作为国家自然科学基金（批准号：50431030.59871025,50171006）,国家重点基础研究发展规划（批准号：G200067201-3）和教育部跨世纪优秀人才培养计划资助项目.
  • 相关项目：超大本征过冷度金属材料纳米亚稳相形成的基础问题
关键词： Mg77Cu12Zn5Y6, 块体金属玻璃, 内生复合材料, 超常塑性, 比强度
中文摘要：

报道了一种具有超常塑性的Mg77Cu12Zn5Y6块体金属玻璃（BMG）基内生复合材料，该材料的压缩塑性和比强度分别为18．5％和4．31×10^5N·m·kg^-1，是迄今为止在Mg基BMG复合材料中所获得的最高压缩塑性和比强度．这些高性能源于由非晶基体与宽度小于500nm的针状Mg基固溶体相组成的复合结构．针状相本身具有应变强化作用，它导致了多方向剪切带的形成，有效地阻碍非晶基体中剪切带的扩展，使复合材料形变过程中出现了明显的加工硬化现象．

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