Abstract
This study investigated and compared the mechanical properties of boron suboxide (B6O) with and without chromium bromide (CrB2) additive, hot pressed at 1900°C and 1850°C and for 20 minutes, with applied pressures of 50 and 80 MPa respectively. The theoretical density attained for these materials was More than 96%. The phase relationship, microstructures and mechanical properties of these materials were examined and good combination of mechanical properties was obtained with the B6O-CrB2 material (HV 32.1 GPa, K1C 4.5 MPa.m0.5) compared to pure B6O material. Mixing with a small amount (1.7 wt.%, equivalent of 0.4 vol.%) of CrB2 additive resulted in a pronounced improvement in both the hardness and fracture toughness values. The improvement in the fracture toughness was attributed to the introduction of the second phase and the toughening mechanism is presumed to be by crack bridging and deflection due to bimetallic stress.
| Original language | English |
|---|---|
| Title of host publication | World Congress on Engineering, WCE 2014 |
| Editors | Craig Douglas, S. I. Ao, S. I. Ao, Warren S. Grundfest, Jon Burgstone, Craig Douglas, Jon Burgstone, S. I. Ao |
| Publisher | Newswood Limited |
| Pages | 632-636 |
| Number of pages | 5 |
| Volume | 2 |
| ISBN (Electronic) | 9789881925374 |
| ISBN (Print) | 9789881925350 |
| Publication status | Published - Jan 1 2014 |
| Event | World Congress on Engineering and Computer Science 2014, WCECS 2014 - San Francisco, United States Duration: Oct 22 2014 → Oct 24 2014 |
Other
| Other | World Congress on Engineering and Computer Science 2014, WCECS 2014 |
|---|---|
| Country | United States |
| City | San Francisco |
| Period | 10/22/14 → 10/24/14 |
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All Science Journal Classification (ASJC) codes
- Computer Science (miscellaneous)
Cite this
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Mechanical properties of hot-pressed boron suboxide with chromium boride additive. / Ogunmuyiwa, Enoch N.; Johnson, Oluwagbenga T.; Sigalas, Iakovos; Hermann, Mathias; Afolabi, Ayo S.
World Congress on Engineering, WCE 2014. ed. / Craig Douglas; S. I. Ao; S. I. Ao; Warren S. Grundfest; Jon Burgstone; Craig Douglas; Jon Burgstone; S. I. Ao. Vol. 2 Newswood Limited, 2014. p. 632-636.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Mechanical properties of hot-pressed boron suboxide with chromium boride additive
AU - Ogunmuyiwa, Enoch N.
AU - Johnson, Oluwagbenga T.
AU - Sigalas, Iakovos
AU - Hermann, Mathias
AU - Afolabi, Ayo S.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - This study investigated and compared the mechanical properties of boron suboxide (B6O) with and without chromium bromide (CrB2) additive, hot pressed at 1900°C and 1850°C and for 20 minutes, with applied pressures of 50 and 80 MPa respectively. The theoretical density attained for these materials was More than 96%. The phase relationship, microstructures and mechanical properties of these materials were examined and good combination of mechanical properties was obtained with the B6O-CrB2 material (HV 32.1 GPa, K1C 4.5 MPa.m0.5) compared to pure B6O material. Mixing with a small amount (1.7 wt.%, equivalent of 0.4 vol.%) of CrB2 additive resulted in a pronounced improvement in both the hardness and fracture toughness values. The improvement in the fracture toughness was attributed to the introduction of the second phase and the toughening mechanism is presumed to be by crack bridging and deflection due to bimetallic stress.
AB - This study investigated and compared the mechanical properties of boron suboxide (B6O) with and without chromium bromide (CrB2) additive, hot pressed at 1900°C and 1850°C and for 20 minutes, with applied pressures of 50 and 80 MPa respectively. The theoretical density attained for these materials was More than 96%. The phase relationship, microstructures and mechanical properties of these materials were examined and good combination of mechanical properties was obtained with the B6O-CrB2 material (HV 32.1 GPa, K1C 4.5 MPa.m0.5) compared to pure B6O material. Mixing with a small amount (1.7 wt.%, equivalent of 0.4 vol.%) of CrB2 additive resulted in a pronounced improvement in both the hardness and fracture toughness values. The improvement in the fracture toughness was attributed to the introduction of the second phase and the toughening mechanism is presumed to be by crack bridging and deflection due to bimetallic stress.
UR - http://www.scopus.com/inward/record.url?scp=84918553820&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84918553820&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84918553820
SN - 9789881925350
VL - 2
SP - 632
EP - 636
BT - World Congress on Engineering, WCE 2014
A2 - Douglas, Craig
A2 - Ao, S. I.
A2 - Ao, S. I.
A2 - Grundfest, Warren S.
A2 - Burgstone, Jon
A2 - Douglas, Craig
A2 - Burgstone, Jon
A2 - Ao, S. I.
PB - Newswood Limited
ER -