LU Lingchao, SHEN Yufang, CHANG Jun, LIU Futian, CHENG Xin,^∗ GUO Jianting

（Jinan University‚250022‚^∗Institute of Metal Research‚Chinese Academy of Science）

Abstract: The present paper deals with a primary study on the dispersion behavior of Al₂O₃/NiAl slurries. The experiments are shown as follows: zeta potenial of both Al₂O₃ and NiAl particles reaches the highest point in a slurry with respect to  pH＞10.6. For Al₂O₃ slurries with a solid content higher than40vol％‚the optimum pH range is 11～12; the optimum dispersant content of 40vol％、50vol and 60vol％ slurries are 0.6wt％‚2.8wt％ and 8.0wt％ respectively．For NiAl slurries    with a solid content less than 30vol％‚the optimum pH range is 9～11；the optimum dispersant content is 0.5wt％. The slurry with 50vol％ （Al₂O₃/NiAl－20） composite system exhibits excellent dispersion behavior under the best dispersing conditions.

Keywords: ceramic slurry‚intermetallics‚rheological behavior‚dispersion behavior