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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