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Sc提高鋯基塊體非晶合金玻璃形成能力的機(jī)理
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TG146.4

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教育部行動(dòng)計(jì)劃“納米材料的非晶晶化”和國(guó)家自然科學(xué)基金（50501017）


The Mechanism of Sc Increaseing the Glass Forming Ability of a Zirconium Based Bulk Amorphous Alloy
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    摘要:

    以Zr52.5Cu17.9Ni14.6Al10Ti5五元鋯基非晶合金為研究對(duì)象，在以工業(yè)級(jí)海綿鋯為原料制備的合金中加入元素Sc，制備出楔形試樣，從微觀角度分析了元素Sc提高非晶合金玻璃形成能力的機(jī)理。結(jié)果表明，元素Sc的加入可顯著改變Zr52.5Cu17.9Ni14.6Al10Ti5五元鋯基塊體非晶態(tài)合金在非晶態(tài)-晶態(tài)過(guò)渡區(qū)中先析相的相結(jié)構(gòu)及組織形態(tài)。元素Sc強(qiáng)烈的脫氧作用可減少合金中鋯氧化物／鋯氧團(tuán)簇，從而消除了過(guò)冷液體中異質(zhì)形核的核心，提高了Zr52.5Cu17.9Ni14.6Al10Ti5五元鋯基塊體非晶態(tài)合金的玻璃形成能力。

    Abstract:

    Quintary Zr52.5Cu17.9Ni14.6Al10Ti5 bulk amorphous alloys were synthesized with industrial sponge zirconium. The wedge-shaped samples added with Sc were prepared. The mechanism of Sc increaseing the GFA of the ahoy was analyzed by means of X-ray diffraction. SEM and Energy Spectrum Analysis. The results showed that adding Sc to the alloy could cause the transformation of phase structure and the composition of the pre-separation phase in the transitional region of the quintary alloy. Sc with great capacity of deoxidization could decrease the existence of Zirconium oxide or Zirconium/oxygen clusters in the alloy, and eliminate heterogeneous nucleants in the melt. Consequently. adding Sc to the alloy could increase the GFA of the quintary alloy.

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李洋 賀林 孫軍 江峰. Sc提高鋯基塊體非晶合金玻璃形成能力的機(jī)理[J].稀有金屬材料與工程,2006,35(11):1740~1743.[Li Yang, He Lin, Sun Jun, Jiang Feng. The Mechanism of Sc Increaseing the Glass Forming Ability of a Zirconium Based Bulk Amorphous Alloy[J]. Rare Metal Materials and Engineering,2006,35(11):1740~1743.]
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  • 收稿日期:2005-12-14
  • 最后修改日期:2006-04-27
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