| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Cast Shop Technology
|
| Presentation Title |
Recent Studies Using HR-TEM on the Fundamental Mechanism of Nucleation of α Aluminium on TiB2 in High Efficiency Grain Refiners |
| Author(s) |
John H. Courtenay |
| On-Site Speaker (Planned) |
John H. Courtenay |
| Abstract Scope |
Recent studies undertaken using HR-TEM (High Resolution Transmission Electron Microscopy) at BCAST, Brunel University London on the mechanism of nucleation of α aluminium on TiB2 in commercial high efficiency grain refiners has shown that efficiency as measured by the Opticast Nucleation test can be directly related to the extent to which the TiB2 particles have successfully formed a monoatomic layer of TiAl3 on their basal plane. This factor was found to be predominant over other factors generally considered to have an influence such as particle size distribution and average particle diameter in high efficiency grain refiners. As a result of this research it is now possible to produce a range of ultra high efficiency grain refiners which enable addition rates to be further reduced to levels as low as 0.15kg/t enabling the particle count to be significantly reduced benefiting liquid metal and as cast metal quality to be improved |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Biomaterials, |