.png){kind=icon}
.png){kind=icon}
Return
Microstructure and mechanical properties of (TiB2-SiC)/B4C composite ceramics using (TiSi2 + C) as sintering aid
.png){kind=icon}
PRE
AI
X
Z
Q
Q
DOI：10.1016/j.ceramint.2025.10.365.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
In this study, (TiB2-SiC)/B4C composite ceramics were fabricated via in-situ reaction using spark plasma sintering (SPS) at a temperature of 1650 °C and a pressure of 80 MPa, with (TiSi2 + C) employed as the sintering additive. The effects of the secondary phase content on the phase composition, microstructure, and mechanical properties were systematically investigated. The results indicate that the addition of the (TiSi2 + C) sintering aid effectively improves both the sinterability and the mechanical properties of B4C. With the addition of 25 wt% sintering aids, the (TiB2-SiC)/B4C composite ceramic exhibited an ultra-high Vickers hardness of 33.92 GPa, an excellent flexural strength of 546.02 MPa, and a high fracture toughness of 6.75 MPa m1/2. These enhancements are primarily attributed to the reduced porosity, the formation of strongly bonded TiB2+SiC secondary phase aggregates, the grain refinement strengthening effect due to the inhibition of grain growth by intergranular secondary phases, and the synergistic influence of a mixed fracture mode.
Journal
IF:
5.6
Papers:
5.0W
Citations:
15.5W
Organization
Cited Papers