| 快速凝固Al-Mn-Cu合金中准晶相的研究 |
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| 引用本文： | 易丹青,李松瑞,邓至谦,聂祚仁,成钧. 快速凝固Al-Mn-Cu合金中准晶相的研究[J]. 中南大学学报(自然科学版), 1991, 0(4) |
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| 作者姓名： | 易丹青 李松瑞 邓至谦 聂祚仁 成钧 |
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| 作者单位： | 中南矿冶学院材料科学与工程系，中南矿冶学院材料科学与工程系，中南矿冶学院材料科学与工程系，中南矿冶学院测试分析中心，中南矿冶学院测试分析中心 |
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| 摘 要： | 采用X射线衍射、透射电镜(TEM)和差热分析(DTA)等手段在快速凝固A_(66)Mn_(14)Cu_(20)合金中发现一个二十面体相。这个相的选区电子衍射花样显示出准晶体结构的五次对称性。X射线能谱分析结果表明它是一个成分为Al_(11)Mn_3Cu_6的三元相。差热分析结果反映出这个准晶相有很高的热稳定性。以20K/min的速度加热时,这个相的晶化峰值温度为818K,其转变激活能约为405.7kJ/mol。
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| 关 键 词： | 铝合金 快速凝固 准晶相 |
STUDY ON A QUASICRYSTALLINE PHASE IN A RAPIDLY SOLIDIFIED Al-Mn-Cu ALLOY |
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| Yi Danqing,Li Songrui Associate Professor,Den Zhiqian Associate Professor,Nie Zuoren,Cheng Jun. STUDY ON A QUASICRYSTALLINE PHASE IN A RAPIDLY SOLIDIFIED Al-Mn-Cu ALLOY[J]. Journal of Central South University:Science and Technology, 1991, 0(4) |
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| Authors: | Yi Danqing Li Songrui Associate Professor Den Zhiqian Associate Professor Nie Zuoren Cheng Jun |
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| Affiliation: | Yi Danqing;Li Songrui Associate Professor;Den Zhiqian Associate Professor;Nie Zuoren;Cheng Jun Department of Materials Science and Engineering Instrument Test and Analysis Center |
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| Abstract: | An icosahedral phase in a rapidly solidifidd Al_(66) Mn_(14) Cu_(20) alloy is identified by means of X-ray diffraction (XRD), transmission microscope (TEM) and differential thermal analysis (DTA)methods. The selected area diffraction patterns from the phase show a fivefold symmetry of a qua-sierystalline structure. The energy dispersive X-ray spectra (EDXS) for the phase indicate that it is aternary of composition Al_(11) Mn_3 Cu_6. The results of DTA reveal that it has high thermal stability.Its crystalization peak temperature (at heating rate 20 K/min) is 818 K, and the activation energy ofthe transformation is about 405. 7 kJ/mol. |
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| Keywords: | aluminium alloy rapid solidification quasicrystalline phase |
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