Microstructural changes induced by thermal treatment in Cu47Ti33Zr11Ni8Si1 metallic glass

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:498

Article

Bednarcik, J.²  Venkataraman, S.¹  Khvostikova, O.¹  Franz, H.²  Sordelet, D. J.³  Eckert, J.^1,4 

[1] Inst Komplexe Mat, IFW Dresden, D-01069 Dresden, Germany

[2] DESY, HASYLAB, D-22603 Hamburg, Germany

[3] Iowa State Univ, Ames Lab, Mat & Engn Phys Program, USDOE, Ames, IA 50011 USA

[4] Inst Werkstoffwissensch, TU Dresden, D-01062 Dresden, Germany

关键词: Metallic glass;    Synchrotron light;    Thermal treatment;    DSC;    XRD;   

DOI  :  10.1016/j.msea.2008.08.016

来源: Elsevier

【 摘 要 】

The influence of thermal treatment on structural changes in the Cu47Ti33Zr11Ni8Si1 metallic glass has been monitored using X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Additionally, the short-range order structure has been investigated by XRD using synchrotron radiation. The changes observed in the calorimetric behaviour cannot be quantified using conventional XRD. Small changes are, however, visible in the total structure factor S (Q) primarily in terms of amplitude of the oscillations, which tend to increase with increasing thermal treatment temperature. Real-space analysis of the pair distribution function suggests that the first coordination shell consists of three peaks, which can be modelled using Gaussian distributions. Furthermore, the synchrotron data also reveal changes in the local structure that occur during structural relaxation and early formation of nanocrystals at temperatures close to the experimentally determined crystallization temperature. (C) 2008 Elsevier B.V. All rights reserved

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