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 language | English |
|---|---|
| Title of host publication | WCECS 2015 - World Congress on Engineering and Computer Science 2015 |
| Editors | Craig Douglas, Jon Burgstone, Warren S. Grundfest, Jon Burgstone, Craig Douglas, S. I. Ao |
| Publisher | Newswood Limited |
| Pages | 614-618 |
| Number of pages | 5 |
| Volume | 2220 |
| ISBN (Electronic) | 9789881404725 |
| Publication status | Published - Jan 1 2015 |
| Event | 2015 World Congress on Engineering and Computer Science, WCECS 2015 - San Francisco, United States Duration: Oct 21 2015 → Oct 23 2015 |
Other
| Other | 2015 World Congress on Engineering and Computer Science, WCECS 2015 |
|---|---|
| Country | United States |
| City | San Francisco |
| Period | 10/21/15 → 10/23/15 |
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All Science Journal Classification (ASJC) codes
- Computer Science (miscellaneous)
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Controlled surface treatment of mild steel with carbon nanotubes at austenitic temperature. / Afolabi, Ayo S.; Hassan, Ajoke S.; Daramola, Michael O.
WCECS 2015 - World Congress on Engineering and Computer Science 2015. ed. / Craig Douglas; Jon Burgstone; Warren S. Grundfest; Jon Burgstone; Craig Douglas; S. I. Ao. Vol. 2220 Newswood Limited, 2015. p. 614-618.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Controlled surface treatment of mild steel with carbon nanotubes at austenitic temperature
AU - Afolabi, Ayo S.
AU - Hassan, Ajoke S.
AU - Daramola, Michael O.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84992735273&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84992735273&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84992735273
VL - 2220
SP - 614
EP - 618
BT - WCECS 2015 - World Congress on Engineering and Computer Science 2015
A2 - Douglas, Craig
A2 - Burgstone, Jon
A2 - Grundfest, Warren S.
A2 - Burgstone, Jon
A2 - Douglas, Craig
A2 - Ao, S. I.
PB - Newswood Limited
ER -