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Zr60Al15Ni25大块非晶合金的无序程度对晶化动力学的影响
引用本文:马强,闫志杰,郝维新,胡勇.Zr60Al15Ni25大块非晶合金的无序程度对晶化动力学的影响[J].中国有色金属学会会刊,2011(2):300-306.
作者姓名:马强  闫志杰  郝维新  胡勇
作者单位:太原科技大学材料科学与工程学院;
基金项目:Project (50804032) supported by the National Natural Science Foundation of China; Project (2008011046) supported by the Natural Science Foundation of Shanxi Province, China; Project (20080321036) supported by the Key Technologies R & D Program of Shanxi Province, China
摘    要:采用高分辨率电镀观测铸态Zr60Al15Ni25的微观结构。X-射线分析表明,铸态Zr60Al15Ni25合金为非晶态,而通过高分辨电镜发现非晶合金中存在大量的短程有序区。实验发现,非晶合金的无序程度与相对应的母合金铸锭的凝固组织密切相关。通过差示扫描量热法研究非晶合金在线性加热和等温条件下的晶化动力学。结果表明:非晶合金的晶化是预先存在的短程有序区作为晶核长大开始的三维扩散控制的过程。Zr60Al15Ni25块体非晶合金的无序程度对其晶化动力学具有明显的影响,即无序程度越大,非晶合金的晶化越迟缓。

关 键 词:Zr60Al15Ni25金属玻璃  短程有序  晶化动力学

Influence of amorphous degree on crystallization kinetics of Zr_(60)Al_(15)Ni_(25) bulk metallic glass
MA Qiang,YAN Zhi-jie,HAO Wei-Xin,HU Yong School of Materials Science , Engineering,Taiyuan Univ ersity of Science , Technology,Taiyuan ,China.Influence of amorphous degree on crystallization kinetics of Zr_(60)Al_(15)Ni_(25) bulk metallic glass[J].Transactions of Nonferrous Metals Society of China,2011(2):300-306.
Authors:MA Qiang  YAN Zhi-jie  HAO Wei-Xin  HU Yong School of Materials Science  Engineering  Taiyuan Univ ersity of Science  Technology  Taiyuan  China
Affiliation:MA Qiang,YAN Zhi-jie,HAO Wei-Xin,HU Yong School of Materials Science and Engineering,Taiyuan Univ ersity of Science and Technology,Taiyuan 030024,China
Abstract:The microstructure of as-cast Zr60Al15Ni25 bulk metallic glass was investigated by high-resolution transmission electron microscopy. It is found that there exist numerous short-range order regions (SRORs) in the metallic glass though it is identified to be amorphous by X-ray diffraction method. Furthermore, the amorphous degree shows a close correlation with the microstructure of corresponding mother ingot. The crystallization kinetics was investigated by differential scanning calorimetry under isochronal a...
Keywords:Zr60Al15Ni25 metallic glass  short-range order  crystallization kinetics  
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