Effects of Microalloying on Glass Forming Ability and Thermodynamic Fragility of Cu-Pr-Based Amorphous Alloys

The effects of microalloying of Ti and B on the glass formation of Cu60Pr30Ni10Al10-2xTixBx（x = 0, 0.05% （atom fraction）） amorphous alloys was investigated using differential scanning calorimetry （DSC） and X-ray diffraction （XRD）. XRD analysis showed that mieroalloying with 0.05% Ti and 0.05% B impr...

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Bibliographic Details
Published in:Journal of rare earths 2007-10, Vol.25 (5), p.615-618
Main Author: 李雪莲 边秀房 郭晶 赵岩 武玉琴 孙保安
Format: Article
Language:English
Subjects:
difference in Gibbs free energy
fragility
glass forming ability
microalloying
rare earths
TG111.3
TG146.1
化学结构
稀土元素
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Summary:The effects of microalloying of Ti and B on the glass formation of Cu60Pr30Ni10Al10-2xTixBx（x = 0, 0.05% （atom fraction）） amorphous alloys was investigated using differential scanning calorimetry （DSC） and X-ray diffraction （XRD）. XRD analysis showed that mieroalloying with 0.05% Ti and 0.05% B improved the glass forming ability （GFA）. The smaller difference in the Gibbs free energy between the liquid and crystalline states at the glass transition temperature （△G1-X（Tg）） and the smaller thermodynamic fragility index （△Sf/Tm, where ASf is the entropy of fusion, and Tm is the melting temperature） after mieroalloying correlated with the higher GFA.
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(07)60573-0