无压浸渗法制备高体积含量的铝基复合材料  

High volume aluminum matrix composites prepared by pressureless infiltration

作　　者：赵国田[1] 孙素杰[1] 徐永东[1] 朱秀荣[1] 陈照峰[2] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103 [2]南京航空航天大学材料科学与技术学院,南京210016

出　　处：《兵器材料科学与工程》2006年第2期66-69,共4页Ordnance Material Science and Engineering

摘　　要：试验采用对SiCp表面预氧化后镀镍处理,将颗粒大小为28、43、74μm,质量之比为2∶3∶5的SiCp和有机胶PVA混合后,用液压机制成Φ(100±1)mm、厚10mm、相对密度为68%的预制件,将预制件置于N2气氛的箱式电阻炉中850℃浸渗2h制成SiCp增强的铝基复合材料。试验结果表明,SiCp表面镀镍后明显地改善了铝合金对其的润湿性能,促使浸渗过程快速进行。显微组织观察表明,复合材料中SiC颗粒在基体合金中分布均匀,并与基体合金界面结合良好,无孔洞。SiC particle surface is plated with nickel after preoxidation, then preform is fabrie＇ated by hydraulic pressure machine with three sizes of SiC particle which is 28.43,74 μm and weight ratio is 2：3：5. The preform diameter is 100±1mm, thickness is 10 mm and the density is 68%. SiCp/Al composite is prepared by the preform being placed in the resistance furnace that the temperat-ure is 850 ℃, holding 2 hour. The experiment result shows that the nickel-plated SiC particle has improved the wettability and accelerated infiltration rate. Microstructure observation shows that SiCp uniformly distributes in the matrix alloy, and the interf-acial bonding between matrix and reinforcement is well, and no cavity exists.

关 键 词：SIC颗粒 预制件 无压浸渗法 复合材料 

分 类 号：TB331[一般工业技术—材料科学与工程]