Controlled surface treatment of mild steel with carbon nanotubes at austenitic temperature

Ayo S. Afolabi, Ajoke S. Hassan, Michael O. Daramola

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This study reports a novel nanocarburization of mild steel using carbon nanotubes at specified austenitic temperature. Carbon nanotubes synthesized in a horizontal chemical vapour deposition reactor were used to enhance the surface hardness of mild steel at 750°C austenitic temperature for 40 minutes carburization period. Various samples of known composition of mild steel were carburized with as-synthesized carbon nanotubes, purified carbon nanotubes and amorphous carbon. The resultant carburized samples were subjected to surface hardness test, and the results of the analyses indicated improved surface hardness having the highest peak surface hardness value of 173.842 ± 4.89 GPa with the purified carbon nanotubes, followed by as-synthesized carbon nanotubes with 162.56 ± 1.55 GPa; and the least was the amorphous carbon with 155.74 ± 4.28 GPa. These values were still higher than that of the original metal substrate, which was 145.188 ± 2.66 GPa. The enhanced surface microhardness displayed by the carbon nanotubes can be attributed to their nano-sizes which assisted in increased diffusion of these materials at the austenitic temperature under study coupled with higher mechanical properties exhibited by these carbon materials.

Original languageEnglish
Title of host publicationWCECS 2015 - World Congress on Engineering and Computer Science 2015
EditorsCraig Douglas, Jon Burgstone, Warren S. Grundfest, Jon Burgstone, Craig Douglas, S. I. Ao
PublisherNewswood Limited
Pages614-618
Number of pages5
Volume2220
ISBN (Electronic)9789881404725
Publication statusPublished - Jan 1 2015
Event2015 World Congress on Engineering and Computer Science, WCECS 2015 - San Francisco, United States
Duration: Oct 21 2015Oct 23 2015

Other

Other2015 World Congress on Engineering and Computer Science, WCECS 2015
CountryUnited States
CitySan Francisco
Period10/21/1510/23/15

All Science Journal Classification (ASJC) codes

  • Computer Science (miscellaneous)

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  • Cite this

    Afolabi, A. S., Hassan, A. S., & Daramola, M. O. (2015). Controlled surface treatment of mild steel with carbon nanotubes at austenitic temperature. In C. Douglas, J. Burgstone, W. S. Grundfest, J. Burgstone, C. Douglas, & S. I. Ao (Eds.), WCECS 2015 - World Congress on Engineering and Computer Science 2015 (Vol. 2220, pp. 614-618). Newswood Limited.