Two approaches were made for improving the toughness of Al-Cu-Fe quasicrystals(QC), i.e., addition of Sn to the Al-Cu-Fe QC(Al-Cu-Fe-Sn), and composite fabrication of Al-Cu-Fe quasi-crystals with various content of pure aluminium. Powders of quasi-crystals were made by atomizer. They were sintered as a disk by PAS (Plasma Activated Sintering) process which shows some particular advantages during sintering. Composites of pure aluminium and Al-Cu-Fe quasi-crystal were also fabricated by PAS. The PASintered bulk specimens were examined by various methods. The experimental results represent that both sintered bulk specimens of Al-Cu-Fe-Sn QC and the composites have shown considerable improvement in toughness comparing with bulk specimen of Al-Cu-Fe quasi-crystals, if not applicable right away.