摘要
利用机械活化-放电等离子烧结的方法,将Fe-A l-A l2O3粉末经机械活化后快速烧结,得到致密且晶粒细小的FeA l/A l2O3块体复合材料。研究表明,在球粉质量比13∶1、转速170 r/m in、球磨时间25h的球磨条件下,Fe-40%(原子数分数)A l-10%(质量分数)A l2O3粉体中的纳米级A l2O3颗粒,在细化和活化Fe、A l金属粉末的同时,还能有效地阻止金属粉末在烧结前合金化生成金属间化合物。在烧结压力40MPa、烧结温度1 050℃、加热时间15m in、保温时间10m in的工艺条件下,制备的FeA l/A l2O3复合材料的相对密度达96.4%。
By mechanical activation -spark plasma sintering methods, dense and small-grain FeAl/Al2O3 bulk composite materials are obtained through rapidly sintering of mechanical-activated Fe-Al-Al2O3 powder. Research shows that, with the ball-milling parameters being ball/powder ratio of 13： 1, milling speed of 170r/min and milling time at 25h, nano-Al2O3 powder in （Fe-40at. % Al）-10wt. % Al2O3 not only activates Fe and Al metal powders, but also effectively prevents the motal powder from generating intermetallic before sintering. With the sintering parameters being sintering press of 40MPa, sintering temperature of 1 050℃, heating time of 15min and holding time of 5min, the sintered density of FeAl/Al2O3 bulk composite material is up to 96.4 %.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2009年第3期203-206,共4页
Powder Metallurgy Technology
基金
湖北工业大学高层次人才科研基金项目
