原位生成(Al_2O_3+Al_3Zr)_p/A359复合材料的电磁制备及磨擦性能  

Electromagnetic Fabrication and Wear Properties of (Al_2O_3+Al_3Zr)_p/A359 Composites with In-situ Process

作　　者：王宏明[1] 李桂荣[1] 赵玉涛[1] 戴起勋[1] 李忠华[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《铸造技术》2005年第6期459-461,464,共4页Foundry Technology

基　　金：国家自然科学基金(50471050);教育部重点基金项目(2000156);江苏省高校自然科学计划项目(04BJK430022)

摘　　要：利用A359Zr(CO3)2体系,原位反应合成法制备(Al2O3+Al3Zr)p/A359颗粒增强铝基复合材料,在制备过程中施加低频交变电磁场进行搅拌以提高复合材料性能。干滑动磨擦试验表明,复合材料的耐磨擦性比纯基体合金明显提高,施加电磁搅拌后复合材料在较大载荷下的耐磨性提高,磨损量随载荷增加的瞬变载荷由58.8N提高到78.8N。磨损表面的SEM分析显示纯基体合金为粘着磨损和剥层磨损,复合材料的磨损为磨粒磨损为主,施加电磁搅拌后的复合材料为纯磨粒磨损。The particle reinforced aluminum alloy matrix composites, (Al2O3+Al3Zr)p/A359, was fabricated by In-situ reaction in melt A359 and Zr(CO3)2 system. During the fabrication process, a low frequency alternative electromagnetic field was employed to improve the properties of composites by stirring, The results of dry friction experiments indicated that the wear resistance of composites was better than that of pure matrix alloy. And the wear resistance of composites under a heavy load was improved by electromagnetic stirring. The scanning electron microscopy (SEM) analysis of worn-out surface indicated that the wear mechanism of pure matrix alloy was adhesive wear and spalling wear, that of composites without electromagnetic stirring (EMS) in fabrication was mainly abrasion and that of electromagnetic fabricated composites is pure abrasion.

关 键 词：原位反应 铝基复合材料 颗粒增强 电磁制备 磨擦性能 

分 类 号：TB331[一般工业技术—材料科学与工程]