高频脉冲磁场下原位合成(Al_3Zr+Al_2O_3)_p/Al复合材料  

In-Situ Fabrication of Particles-Reinforced Aluminium Matrix Composite with High-Frequency Pulsed Electromagnetic Field

作　　者：李桂荣[1] 戴起勋[1] 赵玉涛[1] 王宏明[1] 张宏杰[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7期568-570,共3页Foundry Technology

基　　金：国家自然科学基金项目(50471050)教育部重点基金项目(2000156)江苏省"十五"科技攻关项目(BE2002040)

摘　　要：在高频磁场中施加脉冲信号,产生脉冲涡流磁场,感应线圈内部磁场分布趋向均匀,并在熔体内出现一定强度的振荡和扰动现象。该外场作用下选用Al-Zr(CO3)2作为反应组元通过熔体直接反应法原位合成了Al3Zr、Al2O3增强颗粒铝基复合材料,粒度2-3μm,颗粒在基体中弥散均匀分布。热力学和动力学分析表明:脉冲涡流磁场促进了传热传质和扩散过程,改善了原位合成过程动力学条件。Pulsing vortexing magnetic field was produced with imposing impulse signal in high-frequency magnetic field; Distribution of magnetic intensity in induction coils tent to be uniform; and meanwhile oscillation and disturbance effects appeared in melt. In-situ Al3Zr, Al2O3 particle reinforced aluminum matrix composite were fabricated through direct melt reaction method. The size of particles was 2~3 μm and the particles were well distributed in the matrix. The results of thermodynamic and kinetic analysis showed that with the imposing foreign field the heat, mass transfer and diffusion were accelerated, which improved the kinetic conditions of in-situ fabricating processing.

关 键 词：脉冲涡流磁场 原位合成 颗粒增强复合材料 

分 类 号：TB331[一般工业技术—材料科学与工程]