Complex crystallization mode of amorphous/nanocrystalline composite Al86Ni2Co5.8Gd5.7Si0.5期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Complex crystallization mode of amorphous/nanocrystalline composite Al₈₆Ni₂Co_5.8Gd_5.7Si_0.5

Authors:	VI Tkatch SG Rassolov VV Maksimov VK Nosenko GE Abrosimova

Institution:	^a Donetsk Physics and Engineering Institute of NAS of Ukraine, R. Luksemburg str., 72, Donetsk 83114, Ukraine ^b Institute for Metal Physics of NAS of Ukraine, 36 Vernadsky St., Kyiv 03142, Ukraine ^c Institute of Solid State Physics RAS, Chernogolovka, Moscow District 142432, Russia

Abstract:	Kinetics of the first crystallization stage of Al₈₆Ni₂Co_5.8Gd_5.7Si_0.5 amorphous alloy and structure of the partially crystallized specimens were investigated by measurements of electrical resistance, X-ray diffraction and transmission electron microscopy. The presence of Al nanocrystals and eutectic colonies consisted of mutually oriented crystals of Al and metastable phase was found. The transient nucleation and slowing-down diffusion-limited growth and the interface-controlled growth of the quenched-in nuclei were identified as mechanisms of formation of the Al nanocrystals and eutectic colonies, respectively.

Keywords:	Melt-spinning Transmission electron microscopy (TEM) X-ray diffraction (XRD) Aluminum alloys Crystallization
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