凝胶注模法制备多孔铝铜合金  

Preparation of porous aluminum copper alloy by gelcasting

作　　者：袁海英[1] 张新新[1] 卡瑞玛 王召利[1] 常宇宏[1] 王聪聪[1] 贾成厂[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《粉末冶金技术》2014年第4期281-284,295,共5页Powder Metallurgy Technology

基　　金：国家自然科学基金资助项目(51274041)

摘　　要：通过凝胶注模工艺,采用非水基凝胶体系,成功地制备了铝铜合金多孔材料。通过预备试验优化工艺,采用球磨的混粉手段,球料比为1∶4,球磨时间30 min,非水基凝胶体系采用1 ml单体(HEMA),8 ml溶剂(PBO),0.2 ml交联剂(DEGDA),0.02 ml催化剂-引发剂(DMA-CHP),1.2 g分散剂(PVP)。研究不同烧结工艺参数对材料性能的影响。结果表明,在不添加发泡剂的前提下,烧结温度660℃时,烧结体的孔隙率为42.8%。烧结体中形成的第二相CuAl2,经过热处理后可使显微硬度明显提高,最大硬度可以达到95 HV。Abstract： The porous aluminum copper alloy was successfully prepared by non-aqueous gelcasting system. The homogeneous powder was obtained under a ball milling process with ratio of ball to material of 1 ： 4 and milling time of 30min,and optimal condition of 1 ml monomer（HEMA） ,8 ml solvent（PBO） ,0.2 ml cross-linker（DEGDA） ,0.02 ml catalyst-initiator（DMA-CHP） ,and 1.2 g dispersant（PVP）. The sintering conditions and porosity of the sintered body at different temperatures were also studied. The results show that without foaming agent,the porosity reaches 42.8 % at the optimum sintering temperature of 660 ℃. Due to the formation of the second phase CuA12 in the sintered body, mierohardness increases obviously after heat treatment,and the maximum hardness value reaches up to 95 HV.

关 键 词：凝胶注模 铝铜合金 多孔 CuAl2 热处理 

分 类 号：TQ174.62[化学工程—陶瓷工业]