摘要
The structure and microstructure of constituent phases in annealed IQC100-xDQCx alloys, made from mixtures of (Al62Cu25.5Fe12.5) icosahedral quasicrystal （IQC） and (Al70Co15Ni15) decagonal quasicrystal （DQC）, were studied by X-ray diffractometry（XRD）, scanning electron microscopy （SEM）, and energy-dispersive X-ray spectroscopy （EDAX）. These constituent phases are mostly approximants: λ, β and τ3. In addition, an Al-Cu-Co DQC phase is observed in (IQC80DQC20) alloy. The nature of these approximants and their relationship with the quasicrystals（QCs） are discussed; and the evolution of these phases is interpreted by the shifting of their e/a-constant lines in the Al-（Cu, Ni）-（Fe, Co） pseudo-ternary phase diagrams.
The structure and microstructure of constituent phases in annealed IQC_(100-x)DQC_x alloys, made from mixtures of (Al_(62)Cu_(25.5)Fe_(12.5)) icosahedral quasicrystal (IQC) and (Al_(70)Co_(15)Ni_(15)) decagonal quasicrystal (DQC), were studied by X-ray diffractometry(XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDAX). These constituent phases are mostly approximants: λ, β and τ3. In addition, an Al-Cu-Co DQC phase is observed in (IQC_(80)DQC_(20)) alloy. The nature of these approximants and their relationship with the quasicrystals(QCs) are discussed; and the evolution of these phases is interpreted by the shifting of their e/a-constant lines in the Al-(Cu, Ni)-(Fe, Co) pseudo-ternary phase diagrams.
出处
《中国有色金属学会会刊：英文版》
CSCD
2003年第6期1360-1366,共7页
Transactions of Nonferrous Metals Society of China
基金
Project (PRAMX 99/0 4)supportedbyFrench ChineseAssociationforScientificandTechnologicResearch(AFCRST),FrenchChineseAdvancedResearchProgramonMaterials,project(5 0 0 710 13 )supportedbytheNationalNaturalScienceFoundationofChina
