采用一种新颖的离心成型法制备了无宏观界面的Al2O3/Ni功能梯度材料, 并研究了料浆调制工艺、离心成型制备机理和梯度材料的力学性能。结果表明， 配制料浆时，粘结剂(聚乙二醇)含量为2 mass%、固相含量为63vol.%、球磨时间为36h，可得到流动性良好的料浆，经离心成型（40min，转速3000 r/min）得到无宏观界面的坯体，在1400 C真空烧结2 h，最终得到致密、组元宏观连续过渡的Al2O3/Ni梯度材料。通过调整固相含量和粘结剂含量，可调控Al2O3/Ni复合材料的成分梯度。
A novel centrifugal compaction method was used to fabricate Al2O3/Ni functionally gradient composites without macro-interface. The slurry preparation, centrifugal compaction mechanism and mechanical properties of the composites were investigated. The results show that slurry with good fluidity can be produced when the binder content, solid content and milling time is 2wt.%, 63vol.% and 36h, respectively. Greenbodies of the Al2O3/Ni functionally gradient composites without macro-interface were fabricated by centrifugal casting (3000 r/min for 40min). Al2O3/Ni functionally gradient composites were produced by vacuum sintering at 1400 C for 2 hours. Through adjusting the solid and binder content, the composition gradient in Al2O3/Ni composites can be controlled.
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