快速凝固Al─Fe基合金条带中准晶相的形成及稳定性

对快速凝固Ａｌ─Ｆｅ基合金的原始条带及退火组织进行了透射电镜分析．结果表明．原始条带截面组织按准晶形成可分成三个区域：无准晶区；准晶形成区；准晶分解区，在６９８Ｋ保温１ｈ发现中间区的准晶开始晶化．组织形貌类同铸态组织的准晶分解区，说明准晶的晶化是在凝固过程中进行的、并且始于准晶与基体界面处

FORMATION AND STABILITY OF QUASICRYSTALLINE PHASE IN RS Al-Fe BASED ALLOY RIBBON

The microstructures of as-cast and annealed ribbons of the RS Al-Fe based alloys have been studied by TEM and energy dispersive X-ray spectrometer. Microstructure of the cross-section ribbons revealed as three areas: with or without quasicrystalline phase and with decomposed quasicrystalline particles.The quasicrystalline in the middle area began to crystallize during annealing at 698 K for 1 h and the resultant microstructure is similar to that of as-cast free-side section,indicating that the crystallization of quasicrystalline phase occurred during solidification and at the interface between quasicrystalline phase and matrix.