Relationship between powder characteristic and internal oxidation of Al in Cu-Al pre-alloyed powders

doi:10.1016/S1006-7191(08)60073-3

Abstract

Abstract:

Since Cu-Al powder characteristics have important effects on the preparation of Cu/Al₂O₃ composite, the apparent activation energy of Al internal oxidation reaction in Cu-Al pre-alloyed powders with different characteristics was calculated in the present investigation. The microstructure and properties of the synthesized Cu/Al₂O₃ were studied. The results show that high-energy milling can obviously promote internal oxidation of Al in Cu-Al powders in the same solid solubility. At the same milling conditions and internal oxidation parameters, the solid solution of Al in Cu either in low or high amount will result in the poor microstructure and properties of the Cu/Al₂O₃composite. Subsequently, when high-energy milling and internal oxidation are synchronously used to prepare the Cu/Al₂O₃composite, there should be an appropriate solubility and milling effect for the pre-alloyed powders.

Key words: characteristic, Internal oxidation, Cu/Al₂O₃ composite material, Solid solution, Reaction rate

Shuhua LIANG,Xianhui WANG,Liang FANG,Zhikang FAN. Relationship between powder characteristic and internal oxidation of Al in Cu-Al pre-alloyed powders[J]. Acta Metallurgica Sinica (English Letters), 2009, 22(1): 71-80.

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