Crystallization Behavior and Structural Stability of Zr50Cu40Al10 Bulk Metallic Glass
Crystallization Behavior and Structural Stability of Zr50Cu40Al10 Bulk Metallic Glass
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DOI：
10.2320/matertrans.mbw200833
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发表时间：
2009-06
影响因子：
1.2
通讯作者：
Shuo Zhang;T. Ichitsubo;Y. Yokoyama;Tokujirou Yamamoto;E. Matsubara;A. Inoue
中科院分区：
文献类型：
--
作者：
Shuo Zhang;T. Ichitsubo;Y. Yokoyama;Tokujirou Yamamoto;E. Matsubara;A. Inoue
采用差示扫描量热仪(DSC)、X射线衍射仪(X射线衍射仪)和共振超声波谱仪(RUS)研究了非晶合金ZR50Cu40Al10的热稳定性及其晶化行为。X射线衍射仪和差示扫描量热仪分析表明：(1)在玻璃状态下，(1)组成原子高度紧密堆积；(2)在常规升温速率下，玻璃呈现出复杂的晶化过程，而在快速升温时，主要形成有序的B2型ZrCu。从原子的长程扩散和弹性应变能两个方面讨论了该材料的热稳定性及其晶化行为。
We have investigated the origin of significantly high thermal stability of Zr 50 Cu 40 Al 10 metallic glass and its crystallization behavior as compared to Zr 70 CU 20 Al 10 and Zr 70 Cu 30 glassy alloys, by differential scanning calorimetry (DSC), x-ray diffraction (XRD) and resonant ultrasound spectroscopy (RUS) techniques. It was found from XRD and DSC analyses that (i) constituent atoms in Zr 50 CU 40 Al 10 are highly close-packed in a glassy state and (ii) Zr 50 Cu 40 Al 10 glass shows a complicated crystallization process when it is heated at conventional heating rates, but when it is rapidly heated, the ordered B2-type ZrCu is dominantly formed. The high thermal stability and its crystallization behavior are discussed in terms of the long-range-diffusion of atoms and elastic strain energy.