Fe-Al系粉末压坯激光反应烧结的研究  

Study on Laser Reactive Sintering of Fe-Al Powder Compacts

作　　者：郭作兴[1] 李光玉[1] 关振中[2] 李雨田[2] 

机构地区：[1]吉林大学材料科学与工程学院,吉林长春130025 [2]中国科学院长春光学精密机械及物理研究所,吉林长春130022

出　　处：《吉林大学学报（工学版）》2003年第1期28-32,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家教育部博士学科点基金资助项目(2000018501)

摘　　要：探讨了Fe Al系粉末压坯在激光作用下的反应烧结行为、物相转变、微观结构和硬度特征。结果表明:在短暂的烧结过程中,粉末压坯实现了燃烧和蔓延,完成了单元素组分向产物相的转变,富Al相大多在颗粒边界形成,也有部分是在颗粒内部析出;随Al含量的增多,边界上析出相的Al含量比内部析出的多,试样的硬度值提高。Laser reactive sintering behavior,phase transformation,microstructure and microhardness characters of a FeAl system powder compacts are investigated.The experimental results show that under the laser beam irradiation,the powder compacts exhibit combustion and propagation.Products of the consinting of compounds reacted from elements are obtained during the sintering pure elements.Alrich phases exist in grain boundary while a few are separated out in the inside grains.As the amount of Al in the alloy increases,more Alrich phases are formed on the grain bowndary and thus the hardness of the alloy increases.

关 键 词：Fe-Al系粉末压坯 激光加热 反应烧结 粉末材料 

分 类 号：TF124[冶金工程—粉末冶金]