块状纳米材料的液态Spinodal分解  

Research on Liquid Spinodal Decomposition of Bulk Nanocrystalline Materials

作　　者：马南钢[1] KuiH W 

机构地区：[1]华中科技大学

出　　处：《中国机械工程》2000年第11期1298-1301,共4页China Mechanical Engineering

基　　金：香港政府研究资助委员会资助项目

摘　　要：对块状纳米材料的形成机理和实验进行了研究 ,在理论和实验上论证了液态 Spinodal分解 ,发生了深度过冷的共晶合金中 ,当过冷度足够大时 ,Spinodal的波长可以进入到纳米尺度 ,从而形成了块状纳米材料。具体研究了 Fe90 B10 合金 ,当 ΔT≥ 41 6℃时 ,得到晶粒尺寸为 2 nm～ 3nm的纳米材料 ,软磁性能为 Br=1 .30 T,Hc=0 .0 1 A/ cm,该合金发生液态的 Spinodal分解 ,并出现多重The manufacturing mechanisms and experiments of bulk nanocrystalline materials are researched in our Lab. The facts of theory and experiment are pointed out:If eutectic alloy is undercooled deeply enough, the spinodal's wavelength can be reduced quickly even to nano-scale, nanocrystalline materials can be gained.The alloy of Fe90B 10 is researched in experiment, when the undercooling temperature is higher than 416℃, a nanocrystalline material which grain size of 2-3nm is gotten. and the soft magnetic properties are Br=1.30T, Hc=0.01A/cm., the liquid spinodal decomposition of Fe90B10occurs spontaneously many times.

关 键 词：SPINODAL分解 纳米材料 晶粒尺寸 过冷度 

分 类 号：TB383[一般工业技术—材料科学与工程]