Abstract
Triplex particulate composites composed of boride and carbide ceramics were found to have high strength, hardness, and fracture toughness values. Two compositions consisting of 70:15:15 and 1:1:1 volume ratios of TiB 2 , SiC, and B 4 C were produced from commercially available powders by hot-pressing. The 70:15:15 ceramic exhibited a strength of ~1.3 GPa, while the 1:1:1 ceramic had a strength of ~0.9 GPa. These strengths are comparable to super-strong Y 2 O 3 -PSZ and β-SiAlON based composites. The Vickers' hardness values of these ceramics were ~32 GPa for indent loads of 9.8 N. Hardness increased as indentation load decreased. The 1:1:1 ceramic had a hardness of ~53 GPa at an indentation load of 0.49 N, higher than values reported for so-called "super-hard" ceramics, and comparable to c-BN.
| Original language | American English |
|---|---|
| Pages (from-to) | 497-501 |
| Number of pages | 5 |
| Journal | Journal of the American Ceramic Society |
| Volume | 101 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 1 2018 |
Keywords
- Boron Carbide
- Silicon Carbide
- Super-Hard
- Super-Strong
- Titanium Diboride
Disciplines
- Ceramic Materials
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