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Chemical Homogeneity and Dispersoid Formation in Mechanically Alloyed Al-Ti Composite Metal Powders
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1992, v.5 no.1, pp.103-110
Lee,
K., &
Moon,
I.
(1992). Chemical Homogeneity and Dispersoid Formation in Mechanically Alloyed Al-Ti Composite Metal Powders. Analytical Science and Technology, 5(1), 103-110.
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Abstract
Chemical homogeneity and dispersoid formation in mechanically alloyed Al-Ti composite metal powders were investigated in order to fabricate the high temperature Al-Ti alloys. The homogeneity of composite particles was able to be obtained by MA milling time more than 10 hours with the milling velocity of 400 rpm. The amounts of titanium, carbon and oxygen elements in MA Al-Ti alloys by chemical analysis were 8.2, 1.135 and 0.233 wt.%, respectively. The amount of carbon analyzed corresponds to 90 pet. of carbon contained the PCA of stearic acid. TEM analysis has revealed the presence of the rounded <TEX>$Al_3Ti$</TEX> dispersoids with the size of 250nm and the <TEX>$Al_4C_3$</TEX> dispersoids of cylindrical shape with a size of 50nm in thickness and 150nm in length. Also, the some rounded <TEX>$Al_2O_3$</TEX> dispersoids with a size of about 20nm were found in grain boundaries as well as in matrix.
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- Chemical homogeneity and dispersoid formation, Al-Ti composite metal powders
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