| Autor: |
MEYERS, M. A., LA SALVIA, J. C., MEYER, L. W., HOKE, D., NIILER, A., MEYERS, M. A., LA SALVIA, J. C., MEYER, L. W., HOKE, D., NIILER, A. |
| Zdroj: |
Journal de Physique IV - Proceedings; October 1991, Vol. 1 Issue: 1 pC3-123-C3-130, 1233128p |
| Abstrakt: |
Titanium carbide and titanium diboride were synthesized by self-propagating combustion reactions and densified by a high-speed forging technique, in which a hammer strikes the hot and porous ceramic ([MATH]) at velocities in the range 5 - 15 m/s. Compacts with densities higher than 96% of the theoretical density and diameters close to 10 cm were produced by this method. Optical and scanning electron microscopy of the consolidated material were carried out, revealing a grain size of approximately 44 µm for TiC and 15 µm for TiB2; these grains were equiaxed, indicating that crystallization (or recrystallization) occurred after the densification process. The quasistatic and dynamic compressive strengths were established and compared to those of hot-pressed material produced by CERCOM. For TiB2, the strengths were approximately 1.8 GPa, while for TiC the quasistatic (10-3s-1) and dynamic (102s-1) strengths were 1.7 and 2.2 GPa, respectively. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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