Al-Al3Ti powders obtained by mechanical alloying and heat treatment
DOI:
https://doi.org/10.3989/revmetalm.2005.v41.iExtra.1003Keywords:
Powder metallurgy, Mechanical alloying, Al-Ti, Heat treatment, SinteringAbstract
Mixed powders of aluminium and titanium (10 wt %) have been mechanically alloyed in an Attritor mill. A metastable solution of titanium in an aluminium matrix is obtained. Changes produced on shape and particle size, structure and microstructure, have been studied when milling time varies between 2 and 10 h. The final processing is carried out for a milling time of 10 h, with approximately 9 wt % of titanium dissolved in the matrix. Finally, a heat treatment is carried out at different temperatures, up to a maximum of 625 °C, which produces the precipitation of different phases such as different structures of Al3Ti and Al4C3. The appearance of these second phases is characterized according to the selected heat treatment temperature.
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