High-Density Pressureless-Sintered HfC-Based Composites |
| |
Authors: | Diletta Sciti Laura Silvestroni Alida Bellosi |
| |
Affiliation: | CNR-ISTEC, Institute of Science and Technology for Ceramics, Faenza I-48018, Italy |
| |
Abstract: | Hafnium carbide (HfC)-(5, 10, and 20 vol%) MoSi2 ceramics were pressureless sintered at 1950°C in an argon flux. The materials had nearly full density (96%–98%), with mean grain sizes in the range of 3–4 μm. Depending on the MoSi2 amount (5–20 vol%), the mechanical properties were in the following ranges: hardness 16–15 GPa, Young's modulus 434–385 GPa, fracture toughness 3.6–3.4 MPa·m1/2, and room-temperature 4-point flexural strength 465–383 MPa. |
| |
Keywords: | |
|
|