底部真空无压浸渗制备SiC_p/Al工艺与性能（英文）  

Process and Performance of β-SiC_p/Al Prepared by Bottom-Vacuum Pressureless Infiltration

作　　者：谢斌[1] 王晓刚[1,2] 华小虎[1] 易大伟[1] 

机构地区：[1]西安科技大学陕西省硅镁产业节能与多联产工程技术研究中心,陕西西安710054 [2]陕西西科博尔科技有限责任公司,陕西西安710054

出　　处：《稀有金属材料与工程》2014年第9期2089-2094,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51074123);Science and Technology R&D Projects of Shaanxi Province(2010TG-02);TheResearch Foundation of Xi’an University of Science and Technology(2012QDJ034 and 201202)

摘　　要：采用底部真空无压浸渗新工艺制备了β-SiCp/Al复合材料。SiC预制体在1373 K高温氧化及被熔融铝浸渗时加入Si、Mg合金元素。通过金相显微镜及SEM表征了复合材料的表面和断口形貌。结果表明,SiC颗粒在基体铝中分布均匀,SiC预制体浸渗完全。XRD分析表明,复合材料中的主晶相为SiC和Al,存在Mg2Si,MgAl2O4界面产物,没有出现Al4C3脆性相。复合材料的力学性能研究表明,复合材料的磨损机制为磨粒磨损和黏着磨损;随着SiC体积分数的增加,复合材料的磨损率下降,硬度上升。A composite material β-SiCp/Al was fabricated by a novel manufacturing process of bottom-vacuum pressureless infiltration. The β-SiC perform was oxidized at 1373 K and the infiltration in molten Al with the addition of Si and Mg. To evaluate the microstructure and the fractograph of the prepared composites, metallographic and scanning electron microscopes （SEM） were applied. The results reveal that SiC particles can be distributed in the aluminum matrix uniformly, the SiC preform can be completely infiltrated by the molten aluminum. X-ray diffraction （XRD） shows that the main crystalline phases in the composites are β-SiC and Al. There exist Mg2Si, MgAl2O4 interface products, brittle phases such as Al4C3 are not formed within the interface zone. Mechanical properties of the β-SiCp/Al composites were investigated by the wear and friction, Brinell hardness tests. The results prove that the wear mechanisms of the composites are abrasive and adhesive wear. With the increased of SiC volume fraction the wear rate of the composite decreases while the hardness increases.

关 键 词：SICP/AL复合材料 界面 体积分数 脆性相 

分 类 号：TB333[一般工业技术—材料科学与工程]