| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bulk Metallic Glasses XX
|
| Presentation Title |
J-81: Investigation of Isothermal Crystallization Behavior of Zr-Cu-Ni-Al Metallic Glass with Enhanced Icosahedral Ordering via Flash DSC |
| Author(s) |
Myeongjun Lee, Geun Hee Yoo, Eon Su Kim, Wook Ha Ryu, Eun Soo Park |
| On-Site Speaker (Planned) |
Myeongjun Lee |
| Abstract Scope |
Many studies have shown that icosahedral phase is formed in Zr-Cu-Ni-Al metallic glass by introduction of certain elements (Ti, Nb, Ta, Mo, etc.). In our past study, we have developed a new composition of Zr-based metallic glass with icosahedral phase as primary phase by substituting Cu with TiNbTaMo high entropy alloy. At thermal analysis with differential scanning calorimetry, two exothermic peak indicating crystallization merge into single exothermic peak with increasing heating rate. This might be indicating the existence of double-nosed TTT-diagram with secondary nose in smaller time scale and higher temperature than primary I-phase nose, but when sample is quenched slower than critical cooling rate, only single I-phase precipitation was shown. By utilizing Flash DSC, a novel chip-based fast scanning calorimetry with extreme heating rate, we investigated isothermal crystallization behavior of Zr<sub>65</sub>Cu<sub>13</sub>Ni<sub>10</sub>Al<sub>10</sub>(TiNbTaMo)<sub>2</sub> in large time/temperature range. We expect to clarify how crystallization sequence changes in our newly developed alloy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Characterization, Other |