【摘 要】
：
The structure and microstructure of constituent phases in annealed IQC100-x DQCx alloys,made from mixtures of Al62 Cu25.5 Fe12.5 icosahedral quasicrystal(IQC)an
【机 构】
：
State Key Laboratory for Materials Modification,LSG2M,Institute of Material & Technology
论文部分内容阅读
The structure and microstructure of constituent phases in annealed IQC100-x DQCx alloys,made from mixtures of Al62 Cu25.5 Fe12.5 icosahedral quasicrystal(IQC)and Al70 Co15 Ni15 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 IQC80 DQC20 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.
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