About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
| Presentation Title |
Reaction Flash Sintering of Ti0.5Zr0.5N and Ti0.5Al0.5N Ternary Metal Nitrides |
| Author(s) |
Suprabha Das, Andriy Durygin, Vadym Drozd, Md Shariful Islam Sozal , Jesse Smith, Zhe Cheng |
| On-Site Speaker (Planned) |
Suprabha Das |
| Abstract Scope |
This study aims to demonstrate reaction flash sintering (RFS) for two powder mixtures - TiN-ZrN (both conducting) and AlN-TiN (TiN conducting but AlN insulating), targeting ternary metal nitrides (TMN) of Ti0.5Zr0.5N and Ti0.5Zr0.5N, respectively. A constant DC electrical field of ~50 V/cm and pressure of ~15 MPa at room temperature triggers RFS without pre-heating, and the entire process finishes in a few minutes. Both ex situ XRD and in situ synchrotron studies are carried out to track the phase evolution during RFS and subsequent cooling. Although both systems have a miscibility gap extending to high temperature, uniform Ti0.5Zr0.5N solution formed in RFS persists upon cooling, while (Ti, Al) N solid solution formed at high temperature goes through a quick phase separation in the cooling process. The final products’ microstructure as well as oxidation resistance and mechanical properties are characterized by TGA/DSC, SEM/EDS, Vickers indentation methods. |