A study on the role of diborides in the heterogeneous nucleation of aluminium
DOI:
https://doi.org/10.3989/revmetalm.2004.v40.i3.260Keywords:
Heterogeneous nucleation, aluminium grain refiners, boridesAbstract
The intangible role of titanium and aluminium diborides in the nucleation of aluminium was re-examined. Two different techniques, complemented with scanning electron microscopy, allowed determining the stability of the diborides in the presence of titanium trialuminides and liquid aluminium phases. Through rapid solidification quenching the high temperature diborides were retained and studied. Then, in a diffusion couple, the reactivity of such diborides was tested in contact with pure titanium trialuminide. It is proposed that a ternary diboride acts as the main catalytic particle in the crystallization of aluminium alloys with refined grains.
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Published
2004-06-30
How to Cite
Suárez, O. M. (2004). A study on the role of diborides in the heterogeneous nucleation of aluminium. Revista De Metalurgia, 40(3), 172–181. https://doi.org/10.3989/revmetalm.2004.v40.i3.260
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