| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
|
| Presentation Title |
Densification, Mechanical and Thermal Properties Study of Zirconium Diboride with Carbon Additions |
| Author(s) |
Yue Zhou, William Fahrenholtz, Gregory Hilmas |
| On-Site Speaker (Planned) |
Yue Zhou |
| Abstract Scope |
Zirconium diboride (ZrB2) ceramics with carbon additions were fabricated by hot-pressing. Two batches of starting powders were prepared: ZrB2 + 0.5wt% C (ZB05C), and ZrB2 + 0.5wt% C + 4.7 wt% ZrH2 (ZB05C-1). The starting ZrB2 and carbon were commercial ZrB2 and phenolic resin which was used to assist in the densification. ZrH2 was used for removing the graphite and B4C impurities. Starting powders were densified at 2150℃ under 32 MPa for 10 minutes. The cross-section morphologies were observed by SEM. Mechanical and thermal properties of both samples were measured and compared. Strength, fracture toughness, hardness, and elastic modulus were measured at room temperature. Thermal diffusivities were measured from room temperature to 1500℃. In addition, ZB05C-1 was densified at temperatures from 1800 - 2150℃ with 50℃ increments. The ram travel of the pressing die at each hot-pressing temperature were collected, and the densification behavior was studied. |