Influence of Multi-Walled Carbon Nanotube Addition on the Hardness of NiAl-CNT and NiAl₃-CNT Composites

Abstract:

Nickel aluminides have shown great potential as high temperature structural materials. In this study, two classes of nickel aluminide were reinforced with 0.5wt% MWCNTs. Starting powders of nickel, aluminium and MWCNTs were ball milled together using a two stage milling regime and consolidated by spark plasma sintering. The effect of MWCNT reinforcement on the hardness of two classes of nickel aluminide was investigated. Microhardness values revealed a lack of dependence on densification for the NiAl₃ composites. The microhardness values of NiAl-CNT reduced with MWCNT addition whereas microhardness values of NiAl₃-CNT increased with MWCNT addition.

• Periodical: Key Engineering Materials (Volume 821)
• Pages: 54-58
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.821.54
• Online since: September 2019
• Authors: Mary Awotunde*, Olusoji Oluremi Ayodele, Adewale Oladapo Adegbenjo, Moses Okoro, Mxolisi Brendon Shongwe, Peter Apata Olubambi
• Keywords: Ball Milling, Carbon Nanotubes, Densification, Microhardness, NiAl, NiAl₃

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