Enhanced bending strength and thermal conductivity in diamond/Al composites with B4C coating
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-07-17 |
| Journal | Scientific Reports |
| Authors | Youhong Sun, Chi Zhang, Linkai He, Qingnan Meng, ŠŠ°Š¾ŃŠ°Š½Š³ ŠŠøŃ |
| Institutions | Jilin University, Ministry of Natural Resources |
| Citations | 39 |
Abstract
Section titled āAbstractāAbstract Diamond/Al composites containing B 4 C-coated and uncoated diamond particles were prepared by powder metallurgy. The microstructure, bending strength and thermal conductivity were characterized considering the B 4 C addition and diamond fraction. The influence of B 4 C coating and fraction of diamond on both bending strength and thermal conductivity were investigated. The bending strength increased with decreasing diamond fraction. Moreover, addition of B 4 C coating led to an obvious increase in bending strength. The peak value at 261.2 MPa was achieved in the composite with 30 vt.% B 4 C-coated diamond particles, which was about twice of that for 30 vt.% uncoated diamond/Al composite (140.1 MPa). The thermal conductivity enhanced with the increase in diamond fraction, and the highest value (352.7 W/mĀ·K) was obtained in the composite with 50 vt.% B 4 C-coated diamond particles. Plating B 4 C on diamond gave rise to the enhancement in bending strength and thermal conductivity for diamond/Al composites, because of the improvement of the interfacial bonding between diamond and aluminum matrix.