Abstract
CNTs/Al composites were fabricated by high energy ball milling. The phase structure and consti- tuent of the preparation process were analyzed. The interface reaction and the formation process of the interface reaction product Al4C3 were discussed by thermodynamics and kinetics. The result shows that no Al4C3 can be found in Al-CNTs composite powders fabricated by high energy ball milling. Al4C3 exists in the inter- face after pressureless sintering. And no appreciable amount of Al4C3 was observed in CNTs/Al composites directly by powder metallurgy. It shows that high energy ball milling can benifit the interface reaction. And the purified CNTs, never milled, is stable in the preparation process of CNTs/Al composites by powder metallurgy.
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