Numéro
J. Phys. IV France
Volume 01, Numéro C3, Octobre 1991
DYMAT 1991 - 3rd International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) C3-123 - C3-130
DOI http://dx.doi.org/10.1051/jp4:1991316
DYMAT 1991 - 3rd International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading

J. Phys. IV France 01 (1991) C3-123-C3-130

DOI: 10.1051/jp4:1991316

REACTION SYNTHESIS/DYNAMIC COMPACTION OF TITANIUM CARBIDE AND TITANIUM DIBORIDE

M.A. MEYERS1, J.C. LA SALVIA1, L.W. MEYER2, D. HOKE1 and A. NIILER3

1  Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla, CA 92093-0411, U.S.A.
2  Fraunhofer Institut für Angewandte Materialforschung, Bremen, Germany
3  U.S. Army Ballistic Research Laboratory, Aberdeen, MD, U.S.A.


Abstract
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 (10-3 s-1) and dynamic (102 s-1) strengths were 1.7 and 2.2 GPa, respectively.



© EDP Sciences 1991