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Al–CNT–Ni composite with significantly increased strength and hardness

Journal Article · · SN Applied Sciences
 [1];  [2]
  1. Bangladesh Univ. of Engineering and Technology, Dhaka (Bangladesh); Univ. of Central Florida, Orlando, FL (United States); University of Central Florida
  2. Univ. of Central Florida, Orlando, FL (United States)
Here, aluminium–carbon nanotube–nickel (Al–CNT–Ni) composite was prepared by powder metallurgy from pure Al powder and Ni-encapsulated CNT. Previously, carbon nanotubes were coated with nickel following ultraviolet-assisted electroless deposition method. Tensile strength and hardness of the composites were found to increase in proportion to the CNTs addition. For an addition of 7 wt.% Ni-coated CNTs containing 2.5 wt.% nanotubes of 8–15 nm diameter (Ni to CNT ratio was 1–0.357), resultant tensile and yield strength were increased by 129.26% and 157.48% respectively compared to pure aluminium. Hardness was also increased by 171.39%. These results were obtained while conventional sintering was followed by further consolidation by Hot Isostatic Pressing (HIP). Enhanced mechanical properties are attributed to the well dispersion of CNTs in aluminium matrix and strong interfacial bonding between CNT and aluminium. Lastly, well dispersion of CNTs and strong interfacial bonding was resulted from the uniform Ni-encapsulation as verified by red shift in Raman Spectroscopy.
Research Organization:
Univ. of Central Florida, Orlando, FL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Advanced Manufacturing Office (EE-5A)
Grant/Contract Number:
EE0007864
OSTI ID:
1581646
Journal Information:
SN Applied Sciences, Journal Name: SN Applied Sciences Journal Issue: 6 Vol. 1; ISSN 2523-3963
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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