About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Thermodynamics of Materials in Extreme Environments
|
| Presentation Title |
Metal di-boride (MB2 | M = Ti, Zr, Nb, Hf, Ta) properties above 3000 ˚C |
| Author(s) |
Elizabeth Sobalvarro, Fox Thorpe, Jesus Rivera, Harry Charalambous, Gabrella King, James Cahill, Wyatt Du Frane, Joshua Kuntz, Scott J. Mccormack |
| On-Site Speaker (Planned) |
Scott J. Mccormack |
| Abstract Scope |
Metal diborides (MB2 | M = Ti, Zr, Nb, Hf, Ta) are considered an ultra-high temperature ceramic due to their relatively low reactivity and high melting point. This work will discuss high temperature levitation methods using a conical nozzle levitator system equipped with lasers to investigate the melting points and thermal expansion of the metal di-borides. The melting point will be investigated using a cooling trace experiments in conjunction with a 400 W CO2 laser and a 500 W Yb laser to melt metal di-boride samples. The thermal expansion will be investigated by coupling the levitation system with X-ray diffraction at Argonne National Laboratories Advanced Photon Source. The high temperature X-ray diffraction data was used to calculate anisotropic coefficients of thermal expansion. The coefficients were compared amongst the diborides. These thermophysical measurements will be critical in developing ultra-high temperature material systems for applications in nuclear fission/fusion reactors, and aerospace vehicles. |