硫酸铝铵原位分解制备Al_2O_3颗粒增强铝基复合材料  

Fabrication of Al_2O_3 particle reinforced aluminum matrix composite by in situ decomposition of NH_4Al(SO_4)_2

作　　者：田福泉[1] 付高峰[1] 姜澜[1] 李兴杰[1] 史玉娟[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《材料与冶金学报》2006年第1期46-49,共4页Journal of Materials and Metallurgy

基　　金：教育部科学技术研究重点项目资助项目(105055)

摘　　要：向铸铝ADC12熔体中添加脱水后的硫酸铝铵,反应分解的A l2O3原位生成颗粒增强铝基复合材料.该方法既可节约成本,同时由NH4A l(SO4)2分解的SO3对熔体具有精炼作用.SEM观察表明,A l2O3颗粒在铝基体中细小弥散分布,形成球形、不团聚的增强体颗粒.与基材相比,该复合材料的耐磨性明显提高;拉伸试验显示,复合材料的抗拉强度和延伸率有所降低.NH4Al（SO4）2 powder was added into ADC12 aluminum alloy melt to fabricate Al2O3 particle reinforced aluminum matrix composite. Not only production cost will be reduced but also the molten composites can be refined due to SO3 gas decomposed from NH4Al （SO4）2- SEM observation shows that insitu Al2O3 particles are generally spherical and distribute homogenously in the ADC12 matrix. The results of wear and tensile tests show that abrasive properties of the composites are better than those of the matrix but the tensile strength and elongation of the composites decrease a little.

关 键 词：铝基复合材料 原位反应 NH4Al(SO4)2 AL2O3颗粒 

分 类 号：TB331[一般工业技术—材料科学与工程]