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Title
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A quantitative method to characterize the -formed interfacial reaction : the case study of MWCNT/Al composites
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Author
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Abstract
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| The Al4C3-formed interfacial reaction plays an important role in tuning the mechanical and thermal properties of carbon/aluminum (C/Al) composites reinforced with carbonaceous materials such as multi-wall carbon nanotube (MWCNT) and graphene nanosheet. In terms of the hydrolysis nature of Al4C3, an electrochemical dissolution method was developed to quantitatively characterize the extent of C/Al interfacial reaction, which involves dissolving the composite samples in alkaline solution first, then collecting and measuring the CH4 gas released by Al4C3 hydrolysis with a gas chromatograph. Through a case study with powder metallurgy fabricated 2.0 wt.% MWCNT/Al composites, the detectability limit of the proposed method is 0.4 wt.% Al4C3, corresponding to 5% extent of interfacial reaction with a measurement error of ± 3%. And then, with the already known MWCNT/Al reaction extent vs different sintering temperature and time, the reaction kinetics with an activation energy of 281 kJ mol− 1 was successfully derived. Therefore, this rapid, sensitive, accurate method supplies a useful tool to optimize the processing and properties of all kinds of C/Al composites via interface design/control. |
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Language
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English
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Source (journal)
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Materials characterization. - New York
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Publication
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New York
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2016
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ISSN
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1044-5803
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DOI
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10.1016/J.MATCHAR.2015.12.031
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Volume/pages
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112
(2016)
, p. 213-218
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ISI
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000370109200026
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Full text (Publisher's DOI)
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Full text (open access)
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Full text (publisher's version - intranet only)
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