Nanocrystallization of bulk Zr-Cu-Ti metallic glass
Nanocrystallization of bulk Zr-Cu-Ti metallic glass
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大块Zr-Cu-Ti金属玻璃的纳米晶化
DOI：
10.1016/s0921-5093(00)01424-6
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发表时间：
2001
期刊：
影响因子：
6.4
通讯作者：
V. Molokanov
中科院分区：
文献类型：
--
作者：
A. Aronin;G. Abrosimova;A. Gurov;Yu. V. Kir’yanov;V. Molokanov
采用差示扫描量热法、X射线衍射法、透射电镜和高分辨电镜研究了Zr 30 Cu 60 Ti 10块体非晶合金在加热过程中的相变。大块金属玻璃的晶化过程分为几个阶段。根据X射线衍射研究，当样品被加热到第一个DSC亚峰（781 K）的末端时，结构与非晶态结构非常相似。然而，第一阶段的转变的体积效应是1.6%，它形成约80%的总体积效应的结晶（2%）。的衍射峰的形状的变化进行了分析的情况下，结构弛豫和纳米晶结构的形成。在晶化的第一阶段形成了晶粒尺寸非常细小的纳米晶结构。纳米晶的粒径为1- 5 nm。
The phase transformations during heating of Zr30Cu60Ti10bulk metallic glass were studied by differential scanning calorimetry, dilatometry, X-ray diffraction, transmission and high resolution electron microscopy. The crystallization of bulk metallic glass was found to occur in several stages. According to X-ray diffraction studies the structure was closely similar to amorphous structure when the sample was heated to the end of the first DSC sub-peak (781K). However, the volume effect of the first stage of transformation is 1.6%; it forms about 80% of total volume effect of the crystallization (2%). A change of the shape of the diffraction maxima has been analyzed for the cases of structure relaxation and nanocrystalline structure formation. The nanocrystalline structure with very fine grain size was found to form during first stage of crystallization. The grain size of the nanocrystals was 1–5nm.