Synchrotron X-ray radiation diffraction studies of thermal expansion, free volume change and glass transition phenomenon in Cu-based glassy and nanocomposite alloys on heating
Synchrotron X-ray radiation diffraction studies of thermal expansion, free volume change and glass transition phenomenon in Cu-based glassy and nanocomposite alloys on heating
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DOI：
10.1016/j.jnoncrysol.2005.04.054
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发表时间：
2005-07
影响因子：
3.5
通讯作者：
D. Louzguine;A. Yavari;K. Ota;G. Vaughan;A. Inoue
中科院分区：
文献类型：
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作者：
D. Louzguine;A. Yavari;K. Ota;G. Vaughan;A. Inoue
采用同步辐射x射线衍射法原位研究了玻璃合金热处理过程中结构松弛引起的热膨胀和体积变化。还发现了玻璃化转变现象。同步辐射x射线衍射成功地用于研究膨胀、玻璃化转变和体积变化现象，探测玻璃合金中的多余自由体积。热-机械长度变化测量和同步辐射x射线衍射分别获得了热膨胀系数的良好对应关系，DSC和同步辐射x射线衍射分别获得了玻璃化转变温度。与全玻璃化合金相比，含纳米晶相的玻璃化基体合金的平均自由体积变化减小了。
Thermal expansion and volume changes due to structural relaxation during heat treatment in glassy alloys were studied in situ using Synchrotron X-ray radiation diffractometry. A glass transition phenomenon was also detected. Synchrotron X-ray radiation diffractometry was successfully used for studying dilatation, glass transition and volume change phenomena detecting excess free volume and in glassy alloys. Good correspondence of the thermal expansion coefficients was obtained independently by thermo-mechanical length change measurements and Synchrotron X-ray radiation diffractometry as well as the glass transition temperature obtained by DSC and Synchrotron X-ray radiation diffractometry. The reduced average free volume change is smaller in the alloy consisting of the glassy matrix containing the nanocrystalline phase compared to the fully glassy alloy.