离心成型法制备无宏观界面的Al_2O_3/Ni功能梯度材料  

Processing of Al_2O_3/Ni functionally gradient composites without macro-interface by centrifugal compaction

作　　者：赵志江[1] 李晓东[1] 修稚萌[1] 潘新[1] 霍地[1] 孙旭东[1] 

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,辽宁沈阳110004

出　　处：《功能材料》2007年第10期1690-1693,共4页Journal of Functional Materials

基　　金：国家杰出青年基金资助项目(50425413)

摘　　要：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,并研究了浆料调制工艺、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%(质量分数)、固相含量为63%(体积分数)、球磨时间为36h,可得到的流动性良好的料浆。经离心成型(3000r/min,40min)得到了无宏观界面的坯体,该坯体在1400℃经2h真空烧结,可以得到致密、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。Abstract.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%, 63vo1% and 36h, respectively. Greenbodies of the Al2O3/Ni functionally gradient composites without macro-interface were fabricated by centrifugal casting （3000r/min for 40min）. Al2O3/Ni functionally gradient composites were produced by vacuum sintering at 1400℃ for 2h. Through adjusting the solid and binder content, the composition gradient in Al2O3/Ni composites can be controlled.

关 键 词：功能梯度材料 Al2O3/Ni 离心成型法 浆料调制 

分 类 号：TB333[一般工业技术—材料科学与工程]