Improving the Toughness of Boron Carbide with SiC and TiB2 Additions
Author Information
Author(s): Ka Juhan, Kim Kyoung Hun, Choi Woohyuk, Jung Sungmo, Lee Tae Hwan, Kim Hyun Sik, Lee Heesoo, Lee Jae Hwa, Paul Geo
Primary Institution: Korea Institute of Ceramic Engineering & Technology (KICET)
Hypothesis
Can minor additions of SiC and TiB2 enhance the mechanical properties of boron carbide composites?
Conclusion
Small amounts of SiC and TiB2 can significantly improve the mechanical properties of boron carbide ceramics while maintaining their lightweight characteristics.
Supporting Evidence
- Adding SiC improved the strength and toughness of boron carbide composites.
- TiB2 addition significantly enhanced fracture toughness without reducing hardness.
- Microstructural analysis showed uniform distribution of second-phase particles.
- Composites achieved over 95% relative density.
- Flexural strength increased with the addition of SiC and TiB2.
- Crack propagation mechanisms were different for SiC and TiB2, contributing to toughness.
- Small amounts of additives effectively enhanced mechanical properties.
- Results suggest potential applications in military and aerospace industries.
Takeaway
This study shows that adding tiny bits of two materials, SiC and TiB2, to boron carbide makes it stronger and tougher without making it heavier.
Methodology
Boron carbide composites were made using hot-press sintering with minor additions of SiC and TiB2, and their mechanical properties were analyzed.
Limitations
The study focused only on small additions of SiC and TiB2, and the effects of larger amounts were not explored.
Digital Object Identifier (DOI)
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