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ZrCuAlSi大塊非晶合金變溫晶化行為
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國(guó)家自然科學(xué)基金項(xiàng)目(50731005)；河南理工大學(xué)博士基金(B2010-81)


Crystallization Behavior of ZrCuAlSi Bulk Metallic Glass in Continuous Heating
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    摘要:

    利用銅模吸鑄法制備Zr46.3Cu43.3Al8.9Si1.5 (at%)大塊非晶合金，利用示差掃描量熱(DSC)儀研究合金連續(xù)升溫過程中的晶化行為，利用Kissinger方法計(jì)算其特征溫度表觀激活能，利用Doyle方法計(jì)算其局域激活能。結(jié)果表明，Zr46.3Cu43.3Al8.9Si1.5大塊非晶合金具有良好的熱穩(wěn)定性。利用Kissinger方法計(jì)算得到其玻璃轉(zhuǎn)變激活能Eg為395.4 kJ /mol、晶化起始激活能Ex為343.2 kJ/mol、晶化峰的激活能Ep為343.0 kJ/mol。Doyle方法計(jì)算其局域激活能表明，其晶化過程中，激活能明顯越過一能量勢(shì)壘后，再呈現(xiàn)逐漸減小的趨勢(shì)

    Abstract:

    Zr46.3Cu43.3Al8.9Si1.5 (at%) bulk metallic glass was prepared by copper mould casting. The crystallization behavior of the alloy in continuous heating was investigated by differential canning calorimeter (DSC). The characteristic temperature apparent activation energy and the local activation energy were calculated by the Kissinger and Doyle equations, respectively. The results show that the activation energies of glass transition (Eg), crystallization (Ex) and peak crystallization (Ep) are 395.4 kJ/mol, 343.2 kJ/mol and 343.0 kJ/mol, respectively. With the increase of the crystallized volume fraction, the crystallization activation energy increases to the largest energy barrier, and then decreases. Zr46.3Cu43.3Al8.9Si1.5 bulk metallic glass has desirable thermal stability

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張寶慶,曹國(guó)華,劉寶忠,袁慶龍,李力新,張 志,王文魁. ZrCuAlSi大塊非晶合金變溫晶化行為[J].稀有金屬材料與工程,2011,40(5):824~828.[Zhang Baoqing, Cao Guohua, Liu Baozhong, Yuan Qinglong, Li Lixin, Zhang Zhi, Wang Wenkui. Crystallization Behavior of ZrCuAlSi Bulk Metallic Glass in Continuous Heating[J]. Rare Metal Materials and Engineering,2011,40(5):824~828.]
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  • 收稿日期:2010-05-10
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