SiCp/AZ31镁基纳米复合材料的高能超声制备及性能  

Study on the fabrication of SiCp/AZ31 nanocomposites by high energy ultrasonic viberation and its characteristics

作　　者：凌李石保[1] 闫洪[1] 胡志[1] 

机构地区：[1]南昌大学先进成形制造及模具研究所,南昌330029

出　　处：《塑性工程学报》2010年第1期139-143,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(50765005);江西省科技厅和江西省教育厅资助项目

摘　　要：文章采用自行设计的高能超声装置制备SiCp/AZ31镁基纳米复合材料,并对制备的复合材料进行显微组织观察和力学性能测试。实验结果表明,高能超声波能使纳米SiCp在镁合金熔体中均匀分散,复合材料抗拉强度和屈服强度都比基体有较大提高,并能保持较高的延伸率。另外,对高能超声波制备金属基复合材料的分散机理,以及SiCp增强镁基纳米复合材料的增强机制,进行了初步探讨。Nano-sized SiC enhanced magnesium matrix nanocomposites （MMNCS）, SiCp/AZ31 MMNCS were successfully fabricated by high-energy ultrasonic device. The microstructure of the composites was investigated by scanning electron microscopy （SEM）. Experimental results show a nearly uniform distribution and dispersion of the nano-sized SiCp within the magnesium ma trix. Test on the tensile property of composites shows that the mechanical properties including tensile strength and yield strength of SiCp/AZ31 were improved significantly with the ductility being retained. The interaction between ultrasonic waves and nanoparticles was discussed. In order to predict the potential yield strength of the reinforced magnesium alloy composites, the strengthening mechanism of nano-sized SiCp enhanced magnesium matrix nanc-composites is also discussed.

关 键 词：金属基纳米复合材料 超声波 纳米碳化硅 

分 类 号：TG148[一般工业技术—材料科学与工程]