Ex>Ep1,Ep1

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ZrxTiNiCuBe高熵非晶合金的晶化動(dòng)力學(xué)
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中國(guó)石油大學(xué)(華東)

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ZR2019MEM032


Crystallization Kinetics of ZrxTiNiCuBe High-Entropy Bulk Metallic Glasses
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    摘要:

    利用銅模鑄造方法制備了ZrxTiNiCuBe(x=1.5、2、2.5、3、3.5at.%)高熵非晶合金,采用差示掃描量熱儀(DSC)對(duì)其晶化動(dòng)力學(xué)進(jìn)行了研究。結(jié)果表明,ZrxTiNiCuBe高熵非晶合金的變溫晶化為多級(jí)晶化過(guò)程,與升溫速率具有明顯動(dòng)力學(xué)效應(yīng)。利用Kissinger方程計(jì)算的變溫晶化激活能,均表現(xiàn)為Eg>Ex>Ep1,Ep1

    Abstract:

    High-entropy bulk metallic glasses (HE-BMGs) are novel bulk alloys combined the multi-principal component characteristics of high-entropy alloys with the long-range disordered atomic stacking characteristics of metallic glass. HE-BMGs, like conventional BMGs, are thermodynamically in a metastable state. However, the crystallization processing of HE-BMGs is different from the conventional BMGs. In this paper, non-equiatomic ZrxTiNiCuBe (x=1.5, 2, 2.5, 3, 3.5at.%) HE-BMGs are prepared by copper mold casting method, and their crystallization kinetics was studied by differential scanning calorimeter (DSC) under both non-isochronal and isothermal conditions. The non-isothermal crystallization kinetics of Zrx HE-BMGs showed a multiple-stage processing. The characteristic temperatures increased with the increase of the heating rate, showing obvious kinetics effects. The activation energy calculated by the Kissinger equation showed Eg>Ex>Ep1,indicating that the overcoming the energy barrier for the rearrangement of was more difficult than atoms nucleation process and the grain growth process of crystallization. The activation energy of crystallization event is Ep1

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王彥芳,何雅茹,胡方裕,石志強(qiáng). ZrxTiNiCuBe高熵非晶合金的晶化動(dòng)力學(xué)[J].稀有金屬材料與工程,2024,53(11):3224~3232.[wang yanfang, He Yaru, Hu Fangyu, Shi Zhiqiang. Crystallization Kinetics of ZrxTiNiCuBe High-Entropy Bulk Metallic Glasses[J]. Rare Metal Materials and Engineering,2024,53(11):3224~3232.]
DOI:10.12442/j. issn.1002-185X.20230588

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  • 收稿日期:2023-09-17
  • 最后修改日期:2023-10-16
  • 錄用日期:2023-10-18
  • 在線發(fā)布日期: 2024-11-20
  • 出版日期: 2024-11-08