Formation, Structure, and Crystallization Behavior of Cu-Based Bulk Glass-Forming Alloys
Formation, Structure, and Crystallization Behavior of Cu-Based Bulk Glass-Forming Alloys
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DOI：
10.1007/s11661-009-0087-8
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发表时间：
2010-07-01
影响因子：
2.8
通讯作者：
Inoue, A.
中科院分区：
文献类型：
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作者：
Louzguine-Luzgin, D. V.;Xie, G.;Inoue, A.
研究了具有极高玻璃形成能力（GFA）的cu - zr基合金，并研究了Ag和Al的加入对其结构和结晶行为的影响。大多数大块玻璃合金（BGAs）不含任何晶体，而通过高分辨率透射电子显微镜（HRTEM）研究的一些样品被发现含有发育良好的中程有序区和大块形式的纳米颗粒。分析了Cu55Zr45、Cu50Zr50、Cu55-x Zr45Ag (x) （x = 0,10,20）、Cu45Zr45Al5Ag5、Cu44Ag15Zr36Ti5和Cu36Zr48Al8Ag8玻璃合金的结晶动力学。研究了冷却速率对铜基玻璃合金加热时玻璃相形成和热稳定性的影响。分析了带状和块状Cu36Zr48Al8Ag8合金的结晶动力学和相组成。结果还表明，由于非平衡加工条件导致的共晶点移位，最佳的非晶化成分可能位于稍微偏离共晶的区域。
We studied Cu-Zr-based alloys having exceptionally high glass-forming ability (GFA) and investigated the influence of Ag and Al addition on their structure and crystallization behavior. Most of the bulk glassy alloys (BGAs) do not contain any crystals, while some samples studied by high-resolution transmission electron microscopy (HRTEM) were found to contain well-developed medium-range order zones and nanoparticles in a bulk form. The crystallization kinetics of Cu55Zr45, Cu50Zr50, Cu55-x Zr45Ag (x) (x = 0, 10, 20), Cu45Zr45Al5Ag5, Cu44Ag15Zr36Ti5, and Cu36Zr48Al8Ag8 glassy alloys was analyzed. An influence of the cooling rate on the formation of glassy phase and thermal stability of the Cu-based glassy alloys on heating was also studied. The crystallization kinetics and phase composition of the ribbon-shape and bulk glassy samples of Cu36Zr48Al8Ag8 alloys were also analyzed. The results also indicate that the best glass-forming compositions are possibly located at slightly off-eutectic area, owing to the shift of the eutectic point due to the nonequilibrium processing conditions.