| Ti-(Cu,Ni)-Sn合金形成金属玻璃的成分优化及其相关联的共晶反应 |
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| 引用本文： | 刘元帅,徐坚.Ti-(Cu,Ni)-Sn合金形成金属玻璃的成分优化及其相关联的共晶反应[J].金属学报,2008,44(12):1424-1430. |
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| 作者姓名： | 刘元帅 徐坚 |
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| 作者单位： | 中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016 |
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| 基金项目： | 973国家重点基础研究发展计划资助 2007CB613906; |
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| 摘 要： | 采用“3D法”, 系统地研究了Ti-(Cu1-xNix)-Sn(0.20≤x≤0.30, 原子分数, 下同) 四元合金的玻璃 形成能力对成分变化的依赖性. 确定玻璃形成能力最佳的合金为Ti38Cu37.8Ni16.2Sn8,Cu模吸铸形成金属玻璃 棒材的临界直径接近1 mm.该金属玻璃的过冷液态温度区间宽度ΔTx为56 K, 约化玻璃转变温度T rg为0.57. 对电弧熔炼Ti38Cu37.8Ni16.2Sn8合金微观结构的研究表明,合金熔体的凝固主要经历伪二元共晶反应:L→ Ti5Sn3Cu+TiCuNi.
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| 关 键 词： | 非晶态合金 金属玻璃 共晶反应 钛合金 |
| 收稿时间： | 2008-03-26 |
| 修稿时间： | 2008-05-04 |
OPTIMIZED COMPOSITIONS OF Ti-(Cu,Ni)-Sn ALLOY FOR METALLIC GLASS FORMATION AND THEIR CORRELATION WITH EUTECTIC REACTION |
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| LIU Yuanshuai,XU Jian.OPTIMIZED COMPOSITIONS OF Ti-(Cu,Ni)-Sn ALLOY FOR METALLIC GLASS FORMATION AND THEIR CORRELATION WITH EUTECTIC REACTION[J].Acta Metallurgica Sinica,2008,44(12):1424-1430. |
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| Authors: | LIU Yuanshuai XU Jian |
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| Affiliation: | Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences |
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| Abstract: | Adopting the “3D pinpointing approach”, compositional dependence of glass--forming ability (GFA) for Ti-(Cu1-xNix)-Sn (0.20≤x≤0.30, atomic fraction) quaternary alloys was systematically investigated. The alloy with the optimized GFA is located at Ti38Cu37.8Ni16.2Sn8. Its critical diameter for metallic glass formation is near 1.0 mm for the rods fabricated using Cu mold casting. This metallic glass exhibits the supercooled liquid region ΔTx of 56 K and the reduced glass transition temperature Trg of 0.57. By characterizing the microstructure of the arc-melted Ti38Cu37.8Ni16.2Sn8 alloy, it is indicated that solidification of the alloy melt undergoes a pseudo-binary eutectic reaction of L→Ti5Sn3Cu+TiCuNi. |
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| Keywords: | amorphous alloy metallic glass eutectic reaction Ti alloy |
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