黄火根,柯海波,刘天伟,张鹏国,唐县娥,王英敏.微合金化对U-Co金属玻璃形成能力的影响[J].稀有金属材料与工程,2018,47(3):990~994.[Huang Huogen,Ke Haibo,Liu Tianwei,Zhang Pengguo,Tang Xiane,Wang Yingmin.Effect of Minor Alloying on the Glass Forming Ability of U-Co Alloy[J].Rare Metal Materials and Engineering,2018,47(3):990~994.]
微合金化对U-Co金属玻璃形成能力的影响
投稿时间:2016-01-19  修订日期:2016-04-20
中文关键词:  金属玻璃  玻璃形成能力  微合金化  铀合金
基金项目:国防基础预研项目(项目号B1520133007)和中国工程物理研究院科技发展(项目号2013A0301015)资助.
中文摘要:
      U-Co系具有较宽非晶成分区间,但其玻璃形成能力(GFA)较差。本文针对该体系的U69.2Co30.8合金,选择不同类型的元素M(M=Sn、Si、Be、Cu、Pd、Y与Zr)进行微合金化,采用铜辊甩带方法制备U69Co30M1非晶合金条带样品,结合X射线衍射与差示扫描量热技术研究了微合金化对合金GFA的影响。结果表明,Sn添加对U-Co合金的GFA具有明显改善作用,Si次之,Be、Cu影响不大,Pd、Y、Zr起到恶化效果。结合合金熔化行为的改变和GFA与M元素的熔点、电负性、原子尺寸及M-C混合焓等参数的关联性分析,初步揭示出微合金化对U-Co合金GFA的影响机制,其本质应该与改变合金液体稳定性和晶化驱动力有关。
Effect of Minor Alloying on the Glass Forming Ability of U-Co Alloy
英文关键词:metallic glass  glass forming ability  minor alloying  uranium alloy.
英文摘要:
      Minor alloying is a useful approach for promoting glass forming ability (GFA) of metallic glasses. U-Co metallic glasses can be achieved in a wide composition range, but their GFAs are very poor. This study is aimed to increase the GFA in U-Co system by minor alloying. Sn, Si, Be, Cu, Pd, Y and Zr were selected as different-typed minor alloying elements in U69.2Co30.8 alloy. The glassy U69Co30M1 (M=Sn, Si, Be, Cu, Pd, Y, Zr) ribbon samples were prepared by melt-spinning with a copper roller, and their phase formation and thermodynamics were investigated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC) techniques. The results indicate that, Sn element significantly improves the GFA, Si displays the second improvement, Be and Cu are slightly effective while Pd, Y and Zr deteriorate the GFA. Based on the combination of the melting behavior change reflected by the DSC result, and the relationship between the GFA and the melting temperatures, electro-negativities, atomic sizes of M elements as well as mixing-enthalpies of M-C, the effect of the minor alloying on the GFA in U-Co system should be attributed to the variation of both metallic liquid stability and the crystallization driving force.
作者单位E-mail
黄火根 中国工程物理研究院材料研究所 hhgeng2002@sina.com 
柯海波 中国工程物理研究院材料研究所  
刘天伟 中国工程物理研究院材料研究所  
张鹏国 中国工程物理研究院材料研究所  
唐县娥 中国工程物理研究院材料研究所  
王英敏 大连理工大学材料科学与工程学院三束材料改性教育部重点实验室  
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