期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 862, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.158686
关键词
Composite materials; Liquid-solid reactions; Diffusion; Phase transitions; X-ray diffraction; Scanning electron microscopy, SEM
资金
- Korea Institute of Materials Science [PNK6710, PNK7070]
- National Research Council of Science & Technology (NST), Republic of Korea [PNK7070, PNK6710] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The cenosphere-reinforced aluminum-magnesium alloy matrix syntactic foams were synthesized by stir casting to investigate the effect of interfacial diffusion during solidification on the dispersion of light hollow particles. It was found that the phase transformation of MgAl2O4 formed by interfacial diffusion during solidification effectively promoted the formation of Al-Mg alloy MSF with a high volume of cenosphere.
To investigate the effect of interfacial diffusion during solidification on the dispersion of light hollow particles, the cenosphere-reinforced aluminum-magnesium (Al-Mg) alloy matrix syntactic foams (MSF) were synthesized by stir casting. Microstructures of the foams were characterized by computed tomography, energy dispersive spectrometry, and electron backscatter diffraction. Cenosphere shells containing Al2O3 and SiO2 were decomposed by redox-reaction, and MgAl2O4 was formed on the shell by interfacial diffusion during solidification. This phase transformation was effective in forming Al-Mg alloy MSF with a high volume of cenosphere, which increased by about 50%. Magnesium silicide (Mg2Si) precipitates were also formed on the matrix by SiO2 reduction. (C) 2021 Elsevier B.V. All rights reserved.
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