Details

Autor(en) / Beteiligte

• Courtenay, John
• Wang, Yun

Titel

Recent Studies Using HR-TEM on the Fundamental Mechanism of Nucleation of a-Aluminum on TiB2 in TiB D High-Efficiency Grain Refiners

Ist Teil von

• Light Metals 2023, p.967-973

Ort / Verlag

Cham: Springer Nature Switzerland

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Recent studies using HR-TEM, (High-Resolution TransmissionTransmission Electron Microscopy) at BCAST, Brunel University, London, on the mechanism of nucleation of a­aluminiumAluminium on TiB2 in commercial high-efficiencyEfficiencygrain refinersGrain refiner have shown that efficiencyEfficiency 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 such as particle size distribution and average particle size. As a result of this research, it is now possible to produce a range of ultra-high efficiencyEfficiencygrain refinersGrain refiner which enable addition rates to be further reduced to levels as low as 0.15 kg/t resulting in higher cost savings and the particle count being significantly reduced in the liquid metal leading to as cast metal quality being improved.