Glass Forming Ability,Thermal Stability and Microstructure Characteristics of Zr-Cu-Fe-Al Alloy

Sun Xiaojun; Jiang Hongxiang; Zhang Lili; Zhao Jiuzhou; He Jie

doi:10.15980/j.tzzz.2021.01.003

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Glass Forming Ability,Thermal Stability and Microstructure Characteristics of Zr-Cu-Fe-Al Alloy
Vol. 41, Issue 1, Pages: 16-22(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.01.003

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[1]孙小钧,江鸿翔,张丽丽,赵九洲,何杰.Zr-Cu-Fe-Al合金的非晶形成能力、热稳定性及组织结构特征[J].特种铸造及有色合金,2021,41(01):16-22.

Sun Xiaojun, Jiang Hongxiang, Zhang Lili, et al. Glass Forming Ability,Thermal Stability and Microstructure Characteristics of Zr-Cu-Fe-Al Alloy. [J]. Special Casting & Nonferrous Alloys 41(1):16-22(2021)
[1]孙小钧,江鸿翔,张丽丽,赵九洲,何杰.Zr-Cu-Fe-Al合金的非晶形成能力、热稳定性及组织结构特征[J].特种铸造及有色合金,2021,41(01):16-22. DOI： 10.15980/j.tzzz.2021.01.003.

Sun Xiaojun, Jiang Hongxiang, Zhang Lili, et al. Glass Forming Ability,Thermal Stability and Microstructure Characteristics of Zr-Cu-Fe-Al Alloy. [J]. Special Casting & Nonferrous Alloys 41(1):16-22(2021) DOI： 10.15980/j.tzzz.2021.01.003.

摘要

采用铜模铸造法制备了Zr-Cu-Fe-Al非晶合金

利用X射线衍射仪、差热分析仪及高分辨透射电镜

系统研究了Al含量和Cu与Fe摩尔比对Zr

(Cu

0.5

)

合金的非晶形成能力、热稳定性及组织结构的影响。结果表明

随着Al含量增加

(Cu

0.5

)

41-x

和Zr

67-x

(Cu

0.5

)

合金的非晶形成能力均呈现先增加后降低的趋势。对于Zr

(Cu

1-x

)

合金

当Cu与Fe摩尔比在5∶5～8∶2之间时

合金非晶形成能力较好。γ参数及晶化温度研究表明

(Cu

0.7

0.3

)

合金具有大的非晶形成能力及高的热稳定性。此外

(Cu

0.5

)

合金的HRTEM结果表明

由于Cu与Fe混合焓为正

在快速冷却条件下

合金将会发生液-液相分离

形成富Fe和富Cu两液相

之后两液相分别发生玻璃转变

最终形成高数量密度的纳米富Fe非晶粒子分布在富Cu非晶基体上的组织结构。

Abstract

The Zr-Cu-Fe-Al amorphous alloy was prepared by copper mold casting.The effects of the Al content and atomic ratio of Cu to Fe on the glass forming ability（GFA）

thermal stability and microstructure were investigated by X-ray diffractometer

differential thermal analyzer and high-resolution transmission electron microscopy.The results reveal that the GFA of both Zr

(Cu

0.5

)

41-x

and Zr

67-x

(Cu

0.5

)

alloy are firstly increased and then decreased with the increase of the Al content.For Zr

(Cu

1-x

)

alloy

the glass forming ability is a better when the atomic of Cu to Fe is between 5∶5and 8∶2.Theγparameter and crystallization temperature indicate that Zr

(Cu

0.7

0.3

)

alloy exhibits the excellent GFA and high thermal stability.Moreover

the HRTEM result of Zr

(Cu

0.5

)

alloy indicates that due to the positive enthalpy between Cu and Fe

the alloy undergoes liquid-liquid phase separation during the rapid cooling

forming Cu-rich and Fe-rich liquid phases and then liquid-glass transition occurs

resulting in phase separation nanocrystals in which glassy Fe-rich nanoparticles with high number density are distributed on the glassy Cu-rich matrix.