Electron microscopy investigation of the TiBAl and TiCAl grain refiner master alloys

Cizek, Pavel 2006, Electron microscopy investigation of the TiBAl and TiCAl grain refiner master alloys, in Journal of Physics: Conference Series, IOP Publishing, Bristol, Eng., pp. 107-110, doi: 10.1088/1742-6596/26/1/025.

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Title Electron microscopy investigation of the TiBAl and TiCAl grain refiner master alloys
Author(s) Cizek, PavelORCID iD for Cizek, Pavel orcid.org/0000-0003-0707-5737
Conference name EMAG–NANO 05: Imaging, Analysis and Fabrication on the Nanoscale
Conference location Leeds, Eng.
Conference dates 2005/08/31 - 2005/09/02
Title of proceedings Journal of Physics: Conference Series
Publication date 2006
Start page 107
End page 110
Total pages 4
Publisher IOP Publishing
Place of publication Bristol, Eng.
Summary The present work brings a detailed statistical analysis of the microstructural characteristics and chemistry of the second phase particles present in the Al-5Ti-1B and Al- 3Ti-0.15C (wt.%) commercial grain refiner rods used in the Al casting industry. The investigation was performed using the TEM, EDS, STEM and HREM techniques. Both refiner rods contained large, blocky Al3Ti DO22particles. Borides present in the TiBAl rod, known to be main α-Al nucleation substrates, exhibited a facetted, hexagonal platelet morphology and largely represented a mixed (Ti,Al)B2phase, with Ti and Al contents changing continuously across the particle dimensions. There were two distinct families of small particles observed in the TiCAl rod. The coarser, facetted particles corresponded to cubic TiC crystal structure and these are believed to be major α-Al nucleation sites. The family of finer, round particles appeared to correspond to orthorhombic Al6Fe phase and their role in the nucleation process remains to be clarified. The results obtained may be used in optimising the grain refiner rod microstructures that would ensure improved refining performance during casting. © 2006 IOP Publishing Ltd.
ISSN 1742-6588
DOI 10.1088/1742-6596/26/1/025
Field of Research 02 Physical Sciences
09 Engineering
HERDC Research category EN.1 Other conference paper
Copyright notice ©2006, IOP Publishing
Persistent URL http://hdl.handle.net/10536/DRO/DU:30098379

Document type: Conference Paper
Collections: Institute for Frontier Materials
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