Processing and characterization of MWCNT reinforced aluminum matrix composites
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Metal matrix composites comprising aluminum matrix and multi-wall carbon nanotubes (MWCNTs) as reinforcements are fabricated using cold uniaxial compaction followed by sintering and cold extrusion as secondary processes. The MWCNTs are pretreated with sodium dodecyl sulfate for improved adhesion with aluminum powder. The effect of sintering temperature on the microstructure is explored using differential scanning calorimetric spectrum. The tensile yield and ultimate strength of Al-MWCNTs increased to 90% with 2 wt% addition of MWCNTs. Various theories for the strengthening and stiffening of Al-MWCNTs composites are explored.
KeywordsSodium Dodecyl Sulfate Metal Matrix Composite Interplanar Spacing Aluminum Powder Aluminum Matrix Composite
The authors acknowledge many fruitful discussions they had with Prof. Raju Ramanujan and Prof. Tan Ming Jen. The experimental help rendered by Mr. Seah Kheng Wee, Mr. Lim Yee Wee, and Mr. Sa’Don Ahmad is much appreciated. The authors are grateful for the financial support from NTU Academic Research Fund (AcRF) via project number RG 19/06.
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