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Cu-Zr-Ti系Cu基块体非晶合金的形成和成分优化

王 清 羌建兵 王英敏 夏俊海 林 哲 张新房 董 闯

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Cu-Zr-Ti系Cu基块体非晶合金的形成和成分优化

王 清, 羌建兵, 王英敏, 夏俊海, 林 哲, 张新房, 董 闯

Formation and composition optimization of Cu-based bulk metallic glasses in Cu-Zr-Ti ternary system

Wang Qing, Qiang Jian-Bing, Wang Ying-Min, Xia Jun-Hai, Lin Zhe, Zhang Xin-Fang, Dong Chuang
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  • 利用与团簇相关的变电子浓度判据研究了过渡金属Cu-Zr-Ti系中Cu基块体非晶合金的形成区域和成分特征.据此判据在Cu-Zr-Ti系相图中确定出三条特殊的成分线,(Cu9/13Zr4/13)100-xTix,(Cu0.618Zr0.382)100-xTix和(Cu0.56Zr0.44)
    The present paper investigates the formation and composition characteristics of Cu-based bulk metallic glasses (BMGs) in the inter-transition metal system Cu-Zr-Ti by using an “e/a-variant criterion” which is relevant to clusters. Three such composition lines, (Cu9/13Zr4/13)100-xTix, (Cu0.618Zr0.382)100-xTix and (Cu0.56Zr0.44)100-xTix, are defined in the Cu-Zr-Ti system. Among them, Cu9Zr4, Cu61.8Zr38.2 and Cu56Zr44 are specific Cu-Zr binary cluster compositions. Alloy compositions are designed along these three composition lines, and alloy rods with diameter of 3mm are prepared by copper mould casting. X-ray and TEM analysis show that BMGs are formed within Ti content range of x=7.5%—15%, x=7.5%—12.5% and x=5%—12% respectively along these three lines. Thermal analysis results further indicate that these BMGs have igher thermodynamic Tg,Tx,Tg/Tl and γ values, and these values of BMGs on every composition line decrease with increasing Ti content. The optimum BMG composition in this system is Cu64Zr28.5Ti7.5 on the (Cu9/13Zr4/13)100-xTix series, which also has the highest hardness and activation energy of crystallization. The characteristic parameters of this BMG are Tg=736K, Tx=769K, Tg/Tl=0.627,γ=0.403, Hν= 6.74GPa and ΔE=3.88 eV, which are all superior to those of the reported BMG Cu60Zr30Ti10.
    • 基金项目: 国家自然科学基金(批准号:50271012和50401020)资助的课题.
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  • 文章访问数:  9175
  • PDF下载量:  1398
  • 被引次数: 0
出版历程
  • 收稿日期:  2005-03-18
  • 修回日期:  2005-05-08
  • 刊出日期:  2006-01-20

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